CN111962952A - A kind of concrete-filled steel tubular column-H-shaped steel beam-steel support-π-shaped connecting piece combined middle column bottom node and method - Google Patents

A kind of concrete-filled steel tubular column-H-shaped steel beam-steel support-π-shaped connecting piece combined middle column bottom node and method Download PDF

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CN111962952A
CN111962952A CN202010790616.9A CN202010790616A CN111962952A CN 111962952 A CN111962952 A CN 111962952A CN 202010790616 A CN202010790616 A CN 202010790616A CN 111962952 A CN111962952 A CN 111962952A
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曹万林
杨兆源
董宏英
张奕慧
乔崎云
张建伟
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Beijing University of Technology
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
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    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings
    • EFIXED CONSTRUCTIONS
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    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/185Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
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    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
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    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
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    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
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    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
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    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02Load-carrying floor structures formed substantially of prefabricated units
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/023Separate connecting devices for prefabricated floor-slabs

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Abstract

本发明公开了一种钢管混凝土柱‑H型钢梁‑钢支撑‑π形连接件组合式中柱底部节点及作法,该节点主要由轻型方钢管再生混凝土柱、H型钢梁、π形连接件、腹板连接板、高强螺栓、钢支撑、工字形板凳拉结钢筋、板柱拉结钢筋以及预制再生混凝土楼板组成。对比现有技术,本节点构造简单,施工便捷,传力路径明确,具有两道抗震防线。本发明创造性的提出π形连接件、板凳形钢筋以及板柱拉结钢筋等新型构造,板‑柱‑节点域整体性增强。有效提高了节点的抗弯、抗压能力及稳定性。进一步保证了钢支撑与π形节点连接构造的可靠性。该节点梁‑柱‑撑‑楼板连接牢固,整体性强,抗震性能优异,为装配式绿色住宅轻钢组合结构的工程设计提供了关键技术支撑。

Figure 202010790616

The invention discloses a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connecting piece combined type middle column bottom node and a method for the method. It consists of parts, web connecting plates, high-strength bolts, steel supports, I-shaped bench tie bars, slab-column tie bars, and prefabricated recycled concrete floor slabs. Compared with the prior art, the node has simple structure, convenient construction, clear force transmission path, and has two anti-seismic defense lines. The invention creatively proposes new structures such as π-shaped connectors, bench-shaped steel bars, and plate-column-tie steel bars, and the integrity of the plate-column-node domain is enhanced. Effectively improve the bending resistance, compression resistance and stability of the node. This further ensures the reliability of the connection structure between the steel support and the π-shaped node. The joint beam-column-bracing-floor connection is firm, the integrity is strong, and the seismic performance is excellent, which provides key technical support for the engineering design of the light steel composite structure of the prefabricated green house.

Figure 202010790616

Description

一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱 底部节点及作法A concrete-filled steel tubular column-H-shaped steel beam-steel support-π-shaped connecting piece combined central column Bottom nodes and practices

技术领域technical field

本发明涉及一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点及作法,属于结构工程技术领域。The invention relates to a combined middle column bottom node of a concrete filled steel tube column-H-shaped steel beam-steel support-π-shaped connector and a method thereof, and belongs to the technical field of structural engineering.

背景技术Background technique

以工业化为依托实现住宅产业化发展已成为必然趋势,发展住宅产业化技术是实现装配式建筑广泛应用并达到城镇绿色建筑发展目标主要手段。Relying on industrialization to realize the development of housing industrialization has become an inevitable trend, and the development of housing industrialization technology is the main means to realize the widespread application of prefabricated buildings and achieve the goal of urban green building development.

装配式钢结构具有轻质高强、生产效率高、装配化水平高等优势,是村镇住宅产业化的理想结构体系。装配式轻钢住宅体系装配化效率高、用钢量低、建设成本低,若结合钢管混凝土等组合结构构件,可进一步减少用钢量、构件截面尺寸并可以获得卓越的承载能力和抗震性能。The prefabricated steel structure has the advantages of light weight, high strength, high production efficiency, and high level of assembly. It is an ideal structural system for the industrialization of village houses. The prefabricated light steel residential system has high assembly efficiency, low steel consumption and low construction cost. If combined with structural components such as concrete-filled steel tubes, the steel consumption and the cross-sectional size of the components can be further reduced, and excellent bearing capacity and seismic performance can be obtained.

传统钢结构多采用H型钢柱作为承重构件,但对于建筑长宽比接近1的村镇住宅,H型钢柱的弱轴方向抗弯性能差。且H型钢柱超过一定长细比,柱底在承受较大弯矩和轴力时存在失稳风险。采用方钢管混凝土混凝土柱这种组合构件,不仅可以满足两个主轴方向抗震性能相同的受力原则,由于钢管和内填混凝土的组作用其在复杂应力状态下的承载能力会大大提高,抗火及抗腐蚀性能得到提高。并且柱截面尺寸可以进一步减小,从而节省混凝土和钢材用量。若在钢管内部浇筑再生混凝土形成方钢管再生混凝土柱,则达到了绿色循环可持续的目的,更有利与环境保护。因此方钢管再生混凝土柱适用于装配式轻钢住宅体系。Traditional steel structures mostly use H-shaped steel columns as load-bearing components, but for village houses with a building length-to-width ratio close to 1, the H-shaped steel columns have poor bending performance in the weak axis direction. Moreover, when the H-section steel column exceeds a certain slenderness ratio, the column bottom has the risk of instability when it is subjected to large bending moments and axial forces. The use of CFST column as a composite member can not only meet the stress principle of the same seismic performance in the two main axis directions, but also greatly improve the bearing capacity under complex stress states due to the combined action of the steel tube and the inner-filled concrete. and improved corrosion resistance. And the column section size can be further reduced, thereby saving concrete and steel consumption. If the recycled concrete is poured inside the steel tube to form a square steel tube recycled concrete column, the purpose of sustainable green circulation is achieved, and it is more beneficial to environmental protection. Therefore, the square steel tube recycled concrete column is suitable for the prefabricated light steel residential system.

轻钢结构体系的抗震性能与装配率一定程度上取决于节点构造的受力合理与否与装配化程度。传统钢结构体系中梁柱连接节点多采用外环板式连接、内隔板式连接以及铸钢连接形式。这几种连接形式适用于跨度、荷载较大的重型钢结构厂房。其节点构造复杂、用钢量大且均无法避免施工现场的焊接工作,装配化程度低,并不适用于轻钢住宅体系梁柱连接。同时,传统节点连接构造并未考虑预制楼板以及预制墙体的装配连接。目前多数装配式墙体与传统节点连接复杂,尤其是基础梁位置底部节点,底部梁柱节点处预制楼板与节点连接可靠性低,防水防潮等构造措施难以实现。预制墙板由于节点处加劲肋等构造的存在需要提前切割出相应空间,容易造成冷桥,不利于房屋保温节能。另外,方钢管再生混凝土柱承载力高,在轻钢村镇住宅结构中,柱截面宽度可以控制在100~150mm。柱截面的缩小造成结构整体抗侧刚度下降,因此需要采用设置层间支撑的方式提高结构整体刚度。目前没有任何适用于钢支撑装配的梁柱节点构造。The seismic performance and assembly rate of the light steel structure system depend to a certain extent on whether the stress of the joint structure is reasonable or not and the degree of assembly. In the traditional steel structure system, the beam-column connection joints mostly adopt the outer ring plate connection, the inner partition plate connection and the cast steel connection. These connection forms are suitable for heavy-duty steel structure workshops with large spans and large loads. Its joint structure is complex, the amount of steel used is large, and the welding work on the construction site cannot be avoided. The degree of assembly is low, and it is not suitable for beam-column connection of light steel residential system. At the same time, the traditional node connection structure does not consider the assembly connection of prefabricated floor slabs and prefabricated walls. At present, most prefabricated walls are complicated to connect with traditional nodes, especially the bottom nodes at the base beam position, and the connection reliability between the prefabricated floor and the nodes at the bottom beam-column nodes is low, and structural measures such as waterproofing and moisture-proofing are difficult to achieve. Due to the existence of stiffeners and other structures at the nodes, the prefabricated wall panels need to cut out the corresponding space in advance, which is easy to cause cold bridges, which is not conducive to the insulation and energy saving of houses. In addition, the square steel tube recycled concrete column has high bearing capacity. In the light steel village and town residential structure, the column section width can be controlled at 100-150mm. The reduction of the column cross-section results in a decrease in the overall lateral stiffness of the structure. Therefore, it is necessary to improve the overall stiffness of the structure by setting interlayer supports. There are currently no beam-column connection configurations available for steel bracing assemblies.

综上所述,设计一种构造简单、传力明确、抗震性能优良且适用于预制墙板、楼板,利于装配式钢支撑安装的轻型装配式方钢管混凝土柱-H型钢梁底部连接节点是目前村镇轻钢组合结构住宅体系发展中亟待解决的问题。基于此,本发明提出了一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点及作法,特别适用于低、多层轻钢框架结构住宅底部中柱连接节点的应用,在保证结构安全可靠的前提下,提高轻钢住宅的经济性和装配效率,为住宅产业化、建筑装配化提供技术参考。To sum up, the design of a lightweight prefabricated concrete-filled square steel tubular column-H-beam bottom connection node, which is simple in structure, clear in force transmission, excellent in seismic performance, suitable for prefabricated wall panels and floor slabs, and conducive to the installation of prefabricated steel supports. At present, the problems to be solved urgently in the development of the light steel composite structure residential system in villages and towns. Based on this, the present invention proposes a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node and method, which is especially suitable for low and multi-storey light steel frame structure residential bottom middle column connection The application of nodes, on the premise of ensuring the safety and reliability of the structure, improves the economy and assembly efficiency of light steel houses, and provides technical reference for the industrialization of houses and building assembly.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点及作法,以解决轻钢框架住宅中柱底部梁柱连接节点受力不合理、耗钢量大、构造复杂问题。解决了中柱底部位置预制楼板及钢支撑与梁柱节点装连接构造难题。The purpose of the present invention is to provide a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connecting piece combined type middle column bottom node and method, so as to solve the unreasonable stress of the beam-column connection node at the bottom of the middle column of the light steel frame residence , The steel consumption is large, and the structure is complex. Solve the problem of connecting the prefabricated floor at the bottom of the central column, the steel support and the beam-column joint.

为实现上述目的,本发明采用如下技术方案:一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点及作法,该节点构造包括轻型方钢管再生混凝土柱(1)、柱板拉结筋(2)、H型钢梁(3)、π形连接件(4)、腹板连接板(5)、30mm长高强螺栓(6)、楼板抗剪栓钉(7)、π形连接件上肢(8)、π形连接件下肢(9)、矩形底板(10)、预制钢支撑(11)、70mm贯通高强螺栓(12)、工字形板凳拉结钢筋(13)、灌浆料托板(14)、预制再生混凝土楼板(15)以及楼板钢筋(16)。如图1、2、3、4所示In order to achieve the above object, the present invention adopts the following technical solutions: a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node and method, the node structure comprises a lightweight square steel tube recycled concrete column ( 1), column-plate tie bars (2), H-shaped steel beams (3), π-shaped connectors (4), web connection plates (5), 30mm long high-strength bolts (6), floor shear bolts ( 7), the upper limb of the π-shaped connector (8), the lower limb of the π-shaped connector (9), the rectangular bottom plate (10), the prefabricated steel support (11), the 70mm through high-strength bolts (12), the I-shaped bench tie steel bar (13) ), a grouting material pallet (14), a prefabricated recycled concrete floor slab (15) and a floor slab reinforcement (16). As shown in Figures 1, 2, 3, and 4

该发明各部件连接与组成关系如下:柱板拉结筋(2)焊接在轻型方钢管再生混凝土柱(1)上用于连接预制再生混凝土楼板(15);π形连接件(4)由π形连接件上肢(8)、π形连接件下肢(9)以及矩形底板(10)组成,其中矩形底板(10)为一中间开矩形孔的钢板,π形连接件上肢(8)、π形连接件下肢(9)分别满焊焊接在矩形底板(10)上,从而形成π形连接件(4);轻型方钢管再生混凝土柱(1)与π形连接件(4)焊接,利用π形连接件(4)上矩形底板(10)的外边缘四边与轻型方钢管再生混凝土柱(1)钢管壁焊接形成外缘四条角焊缝,矩形底板(10)的内侧开孔出的四条边与轻型方钢管再生混凝土柱(1)钢管壁焊接形成内缘四条角焊缝,因此轻型方钢管再生混凝土柱(1)与单个π形连接件(4)通过内侧与外侧共8条角焊缝相连;腹板连接板(5)通过两条直角角焊缝透过矩形底板(10)内侧开孔与轻型方钢管再生混凝土柱(1)钢管壁焊接;H型钢梁(3)上下翼缘与π形连接件(4)的π形连接件上肢(8)、π形连接件下肢(9)通过30mm长高强螺栓(6)进行连接;H型钢梁(3)腹板与腹板连接板(5)通过30mm长高强螺栓(6)进行连接;预制钢支撑(11)通过30mm长高强螺栓(6)与70mm贯通高强螺栓(12)与π形连接件上肢(8)连接;预制再生混凝土楼板(15)通过楼板抗剪栓钉(7)以及高强灌浆料与H型钢梁(3)连接;预制再生混凝土楼板(15)通过柱板拉结筋(2)、工字形板凳拉结钢筋(13)、楼板钢筋(16)相互绑扎最后通过高强浇筑灌浆料相连;灌浆料托板(14)预埋在预制再生混凝土楼板(15)中;工字形板凳拉结钢筋(13)通过70mm贯通高强螺栓(12)固定在π形连接件上肢(8)的腹板处,并与楼板钢筋(16)进行绑扎,浇筑高强灌浆料后使π形连接件上肢(8)与预制再生混凝土楼板(15)形成一体。The connection and composition of the components of the invention are as follows: the column-plate tie bars (2) are welded on the light-weight square steel tube recycled concrete column (1) for connecting the prefabricated recycled concrete floor (15); The upper limb (8) of the π-shaped connector, the lower limb (9) of the π-shaped connector, and the rectangular bottom plate (10) are composed of the rectangular bottom plate (10) being a steel plate with a rectangular hole in the middle, and the upper limb (8) of the The lower limbs (9) of the connecting piece are respectively fully welded on the rectangular base plate (10) to form a π-shaped connecting piece (4); The four sides of the outer edge of the rectangular bottom plate (10) on the connecting piece (4) are welded with the steel pipe wall of the light-duty square steel pipe to form four fillet welds on the outer edge. The light-duty square steel pipe recycled concrete column (1) is welded to the steel pipe wall to form four fillet welds on the inner edge, so the light-duty square steel pipe recycled concrete column (1) and a single π-shaped connector (4) are connected by a total of 8 fillet welds from the inside to the outside. ; The web connecting plate (5) is welded to the steel tube wall of the light-duty square steel tube recycled concrete column (1) through the inner opening of the rectangular base plate (10) through two right-angle welds; the upper and lower flanges of the H-shaped steel beam (3) are The upper limb (8) and the lower limb (9) of the π-shaped connector (4) are connected by 30mm long high-strength bolts (6); the web of the H-shaped steel beam (3) is connected to the web connection plate (5) Connect by 30mm long high-strength bolts (6); prefabricated steel supports (11) are connected to the upper limb (8) of the π-shaped connector by 30mm long high-strength bolts (6) and 70mm through high-strength bolts (12); prefabricated recycled concrete The floor slab (15) is connected with the H-shaped steel beam (3) through the slab shear studs (7) and high-strength grouting material; the prefabricated recycled concrete floor slab (15) is connected with the column-slab tie bars (2) and the I-shaped bench tie bars (13), the floor steel bars (16) are bound to each other and finally connected by high-strength pouring grouting material; the grouting material support plate (14) is embedded in the prefabricated recycled concrete floor slab (15); The high-strength bolts (12) are fixed at the web of the upper limb (8) of the π-shaped connector, and are bound with the floor reinforcement bars (16). 15) Form one.

所述的轻型方钢管再生混凝土柱(1)中的方钢管采用方形热轧无缝钢管。钢管外径为100mm~150mm,壁厚为4mm~8mm,内填再生混凝土,再生粗骨料粒径为5mm~20mm,混凝土强度为C30~C50。所述的轻型方钢管再生混凝土柱(1)具有以下优势:方钢管对内填再生混凝土具有约束作用,提高再生混凝土承载力的同时增强了混凝土的延性;内填再生混凝土限制钢管屈曲,可以有效避免钢管失稳破坏。由于薄壁钢管与内填混凝土的组合作用,柱截面尺寸相比混凝土结构可大大减小,相比钢结构柱用钢量进一步减少。钢管可以作为混凝土浇筑是的模板,施工更加方便、节省成本。在实际工程中,钢管混凝土柱具有施工刚度大、承载力高、抗火抗腐蚀性能好等优点。使用再生混凝土材料后,兼具环保优势。The square steel pipe in the light-duty square steel pipe recycled concrete column (1) is a square hot-rolled seamless steel pipe. The outer diameter of the steel pipe is 100mm-150mm, the wall thickness is 4mm-8mm, the recycled concrete is filled, the particle size of the recycled coarse aggregate is 5mm-20mm, and the concrete strength is C30-C50. The light-duty square steel tube recycled concrete column (1) has the following advantages: the square steel tube has a constraining effect on the inner filled recycled concrete, which improves the bearing capacity of the recycled concrete and enhances the ductility of the concrete; the inner filled recycled concrete limits the buckling of the steel tube, which can effectively Avoid instability and damage of steel pipes. Due to the combined effect of the thin-walled steel pipe and the filled concrete, the cross-sectional size of the column can be greatly reduced compared with the concrete structure, and the amount of steel used in the column of the steel structure is further reduced. Steel pipe can be used as a formwork for concrete pouring, which is more convenient and cost-effective for construction. In practical engineering, CFST columns have the advantages of high construction rigidity, high bearing capacity, and good fire and corrosion resistance. After using recycled concrete materials, it has both environmental advantages.

所述柱板拉结筋(2)为带有弯折锚固端的钢筋。钢筋直径为8mm,强度等级HRB345级。长度为80mm,锚固端弯折长度为40mm。焊接在轻型方钢管再生混凝土柱(1)上,焊接位置与预制再生混凝土楼板(15)内的钢筋处于同一高度处,间距为50mm。装配时柱板拉结筋(2)与楼板钢筋(16)绑扎在一起,并在预制再生混凝土楼板(15)与轻型方钢管再生混凝土柱(1)间的预留孔洞位置浇筑高强灌浆料,其主要作用是将轻型方钢管再生混凝土柱(1)与预制再生混凝土楼板(15)进行有效拉结,增强节点整体性,提高各截面刚度和耗能能力。The column-plate tie bars (2) are steel bars with bent anchoring ends. The diameter of the steel bar is 8mm, and the strength grade is HRB345. The length is 80mm, and the bending length of the anchor end is 40mm. It is welded on the recycled concrete column (1) of the light-weight square steel tube, and the welding position is at the same height as the steel bars in the prefabricated recycled concrete floor slab (15), and the spacing is 50mm. During assembly, the column-slab tie bars (2) and the floor steel bars (16) are bound together, and high-strength grouting material is poured in the reserved holes between the prefabricated recycled concrete floor slab (15) and the light-duty square steel tube recycled concrete column (1). Its main function is to effectively tie the light-duty square steel tube recycled concrete column (1) and the prefabricated recycled concrete floor slab (15) to enhance the integrity of the joint and improve the stiffness and energy dissipation capacity of each section.

所述H型钢梁(3)是轻钢框架结构中的主要承重构件,其主要承担墙体、楼板荷载并将其传递给轻型方钢管再生混凝土柱(1)。轻钢组合结构中一般采用热轧H型钢梁作为主梁或次梁。为避免H型钢梁(2)端部因与节点连接构造柱应力集中发生局部屈曲,在π形连接件(4)的π形连接件上肢(8)、π形连接件下肢(9)外侧设置厚度等于H型钢梁(3)腹板厚度的加劲肋以提高端部刚度。由于π形连接件上肢(8)、π形连接件下肢(9)需要与矩形底板(10)焊接,为防止焊缝处钢梁上下翼缘无法与钢管柱比贴合紧密,在装配前需要将H型钢梁(3)的端部上下各打磨7mm三角形缺口,保证各螺栓孔精确对正。在H型钢梁(3)顶面均匀布置抗剪栓钉,准备将其用以装配式楼板的安装。The H-shaped steel beam (3) is the main load-bearing member in the light steel frame structure, which mainly bears the wall and floor loads and transfers them to the light-weight square steel tube recycled concrete column (1). In the light steel composite structure, the hot-rolled H-beam is generally used as the main beam or the secondary beam. In order to avoid local buckling at the end of the H-shaped steel beam (2) due to the stress concentration of the structural column connected to the node, the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece of the π-shaped connecting piece (4) Provide stiffeners with a thickness equal to the web thickness of the H-beam (3) to increase end stiffness. Since the upper limb (8) of the π-shaped connector and the lower limb (9) of the π-shaped connector need to be welded with the rectangular bottom plate (10), in order to prevent the upper and lower flanges of the steel beam at the welding seam from being unable to fit closely with the steel pipe column, it needs to be assembled before assembly. Grind the upper and lower ends of the H-beam (3) with 7mm triangular notches to ensure accurate alignment of the bolt holes. The shear studs are evenly arranged on the top surface of the H-shaped steel beam (3), ready to be used for the installation of the prefabricated floor.

所述π形连接件(4)是轻钢组合框架梁柱节点的关键部件,由π形连接件上肢(8)、π形连接件下肢(9)与中心开孔的矩形底板(10)构成。The π-shaped connecting piece (4) is a key component of the beam-column joint of the light steel composite frame, and is composed of the upper limb (8) of the π-shaped connecting piece, the lower limb (9) of the π-shaped connecting piece and a rectangular bottom plate (10) with a central hole. .

所述腹板连接板(5)为矩形钢板,其长度与π形连接件上肢(8)、π形连接件下肢(9)长度相同,宽度为矩形底板(10)矩形孔洞高度的80%,厚度等于H型钢梁(3)腹板厚度。腹板连接板(5)一侧通过两条垂直角焊缝,透过矩形底板(9)中心的矩形孔洞垂直焊接在轻型方钢管再生混凝土柱(1)柱壁上。腹板连接板(4)通过、30mm长高强螺栓(6)与H型钢梁(3)腹板相连,形成节点抗震的第二道防线。试验证明,π形连接件(4)在地震作用下失效后腹板连接板(5)仍然可以为节点提供可靠的抗弯与抗剪承载力,因此可以有效防止轻钢框架由于π形连接件(4)破坏而造成梁柱节点失效,导致结构的连续倒塌。腹板连接板(5)的宽度小于矩形底板(10)矩形孔洞的高度,从而可以避开矩形底板(10)与轻型方钢管再生混凝土柱(1)的内侧角焊缝。腹板连接板(5)轴线偏离H型钢梁(2)腹板中心线0.5倍腹板连接板(5)厚度与0.5倍H型钢梁(2)腹板厚度之和。保证H型钢梁(2)安装时腹板中心线可以与轻型方钢管再生混凝土柱(1)截面宽度中心重合。焊缝质量控制等级应为一级或二级。The web connecting plate (5) is a rectangular steel plate, its length is the same as the length of the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece, and the width is 80% of the height of the rectangular hole in the rectangular bottom plate (10), The thickness is equal to the thickness of the web of the H-beam (3). One side of the web connecting plate (5) is vertically welded to the column wall of the light-duty square steel tube recycled concrete column (1) through two vertical fillet welds and a rectangular hole in the center of the rectangular bottom plate (9). The web connecting plate (4) is connected to the web of the H-shaped steel beam (3) through a 30mm long high-strength bolt (6) to form the second line of defense for the joint against earthquakes. The test proves that the web connecting plate (5) can still provide reliable flexural and shear bearing capacity for the joint after the π-shaped connector (4) fails under the action of earthquake, so it can effectively prevent the light steel frame from being caused by the π-shaped connector. (4) Failure of beam-column joints due to damage, resulting in continuous collapse of the structure. The width of the web connecting plate (5) is smaller than the height of the rectangular hole of the rectangular bottom plate (10), so that the inner fillet weld between the rectangular bottom plate (10) and the light-duty square steel tube recycled concrete column (1) can be avoided. The axis of the web connecting plate (5) deviates from the centerline of the web of the H-shaped steel beam (2) by 0.5 times the sum of the thickness of the web connecting plate (5) and 0.5 times the thickness of the web of the H-shaped steel beam (2). It is ensured that the center line of the web plate of the H-shaped steel beam (2) can coincide with the center of the section width of the light-duty square steel tube recycled concrete column (1). The welding seam quality control level shall be first or second.

所述的30mm长高强螺栓(6)是梁柱节点连接的重要环节,其材料应为高强度合金钢或其他优质钢材,在装配式轻钢住宅中多采用8.8和10.9两个强度等级。其长度一般为螺母外露出10~20mm。其主要作用为连接紧固H型钢梁(3)与π形连接件(4)、腹板连接板(5),连接预制钢支撑(11)与π形连接件上肢(8)。同时为方便节点处高强螺栓安装,可先将螺母焊接在π形连接件上肢(8)、π形连接件下肢(9)螺栓孔处,在H型钢梁(3)上下翼缘间使用扭矩扳手装配螺栓,每个螺栓设定相同扭矩。The 30mm long high-strength bolts (6) are an important link in the connection of beam-column joints, and their materials should be high-strength alloy steel or other high-quality steel, and two strength grades of 8.8 and 10.9 are mostly used in prefabricated light steel houses. Its length is generally 10-20mm exposed outside the nut. Its main function is to connect and fasten the H-shaped steel beam (3) with the π-shaped connecting piece (4), the web connecting plate (5), and connect the prefabricated steel support (11) with the upper limb (8) of the π-shaped connecting piece. At the same time, in order to facilitate the installation of high-strength bolts at the nodes, the nuts can be welded to the bolt holes of the upper limb (8) of the π-shaped connector and the lower limb (9) of the π-shaped connector, and torque is applied between the upper and lower flanges of the H-shaped steel beam (3). A wrench assembles the bolts, setting each bolt to the same torque.

所述楼板抗剪栓钉(7)是加强H型钢梁(3)与装配式混凝土板连接的重要构造可充当楼板抗剪键,其长为40mm,其直径10mm,沿梁上翼缘顶面设置一道,节点段部设置两道用以加强。水平间距为80~150mm,预制再生混凝土楼板(15)装配完成后在楼板抗剪栓钉(7)预留孔洞处浇筑高强灌浆料,完成H型钢梁(3)与预制再生混凝土楼板(15)的连接。The floor shear stud (7) is an important structure to strengthen the connection between the H-shaped steel beam (3) and the prefabricated concrete slab, and can act as a floor shear key. On the one hand, the node segment is set up with two channels for reinforcement. The horizontal spacing is 80-150mm. After the prefabricated recycled concrete floor slab (15) is assembled, high-strength grouting material is poured at the reserved holes of the floor slab shear studs (7) to complete the H-shaped steel beam (3) and the prefabricated recycled concrete floor slab (15). )Connection.

所述π形连接件上肢(8)、π形连接件下肢(9)为两个材料、尺寸相同的短工字钢梁,其外伸长度为H型钢梁(3)梁高的1.0~1.5倍,梁高为H型钢梁(3)梁高的0.5~1.0倍,上下翼缘及腹板厚度为H型钢梁(3)翼缘厚度的0.8~1.0倍,翼缘宽度与H型钢梁(3)翼缘宽度相同。π形连接件上肢(8)、π形连接件下肢(9)通过角焊缝垂直焊接于矩形底板(10)上,π形连接件上肢(8)、π形连接件下肢(9)关于中心开孔的矩形底板(10)形心对称布置,上工字钢悬挑短梁下翼缘底部与下工字钢悬挑短梁上翼缘顶部距中心开孔的矩形底板(10)的形心距离分别为H型钢梁(3)的0.55倍梁高度。如此可以保证π形连接件上肢(8)、π形连接件下肢(9)保留一定空隙,保证H型钢梁(3)可以顺利拼装在π形连接件上肢(8)、π形连接件下肢(9)。π形连接件(4)通过外侧角焊缝及内侧角焊缝与轻型方钢管再生混凝土柱(1)通过贴焊连接,焊缝质量控制等级应为一级或二级。The upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece are two short I-beam beams of the same material and size, and their outreach lengths are 1.0 to 1.5 of the beam height of the H-shaped steel beam (3). The beam height is 0.5 to 1.0 times the beam height of the H-shaped steel beam (3), the thickness of the upper and lower flanges and the web is 0.8 to 1.0 times the thickness of the H-shaped steel beam (3) flange, and the flange width is the same as that of the H-shaped steel beam (3). The flange width of the steel beam (3) is the same. The upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece are vertically welded to the rectangular bottom plate (10) through fillet welding, and the upper limb (8) and the lower limb (9) of the π-shaped connecting piece are about the center The centroid of the open rectangular bottom plate (10) is symmetrically arranged, and the centroid distance between the bottom of the lower flange of the upper I-beam cantilever short beam and the top of the upper flange of the lower I-beam cantilever short beam from the center of the rectangular bottom plate (10) with the central hole They are respectively 0.55 times the beam height of the H-shaped steel beam (3). In this way, it can be ensured that the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece retain a certain gap, so that the H-shaped steel beam (3) can be smoothly assembled on the upper limb (8) of the π-shaped connecting piece and the lower limb of the π-shaped connecting piece. (9). The π-shaped connector (4) is connected with the light-weight square steel tube recycled concrete column (1) through the outer fillet weld and the inner fillet weld by stick welding, and the quality control level of the weld shall be first or second.

所述矩形底板(10)为中心开孔的矩形钢板。其材料强度与轻型方钢管再生混凝土柱(1)所用钢材相同,在轻钢住宅建筑中可采用Q345钢。其高度为300mm,并且满足其与π形连接件上肢(8)、π形连接件下肢(9)直角角焊缝尺寸要求。其宽度为100mm,即与π形连接件上肢(8)、π形连接件下肢(9)等宽并满足外侧角焊缝尺寸要求。矩形底板(10)中间位置矩形孔洞宽60mm,高140mm,并满足内侧角焊缝尺寸要求。矩形底板(10)主要起到轻型方钢管再生混凝土柱(1)与π形连接件(4)的连接过渡作用,并且局部加强了轻型方钢管再生混凝土柱(1)钢管壁厚度,保护该部位钢管柱壁不受腐蚀。The rectangular bottom plate (10) is a rectangular steel plate with a central hole. Its material strength is the same as the steel used for the light-weight square steel tube recycled concrete column (1), and Q345 steel can be used in light-steel residential buildings. Its height is 300mm, and it meets the size requirements of right-angle welds with the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece. Its width is 100mm, that is, it is the same width as the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece, and meets the size requirements of the outer fillet weld. The rectangular hole in the middle of the rectangular bottom plate (10) is 60 mm wide and 140 mm high, and meets the size requirements of the inner fillet weld. The rectangular base plate (10) mainly plays the role of connecting and transitioning between the light-duty square steel pipe recycled concrete column (1) and the π-shaped connecting piece (4), and the thickness of the steel pipe wall of the light-duty square steel pipe recycled concrete column (1) is partially strengthened to protect this part The wall of the steel pipe column is not corroded.

所述钢支撑(11)为热轧H型钢,一般以60°~45°角布置在两个相邻轻型方钢管再生混凝土柱(1)之间。钢支撑(11)翼缘宽度与π形连接件上肢(8)相等,腹板高度一般为60mm~100mm。采用Q345钢材。其下端通过开有螺栓孔的钢板与π形连接件上肢(8)的上翼缘通过30mm长高强螺栓(6)以及70mm贯通高强螺栓(12)连接。钢支撑与其下端的钢板焊接。钢支撑(11)主要起到提高框架抗侧刚度、承载力以及提高框架地震过程中的耗能能力。The steel support (11) is a hot-rolled H-section steel, and is generally arranged between two adjacent light-duty square steel tube recycled concrete columns (1) at an angle of 60° to 45°. The width of the flange of the steel support (11) is equal to the upper limb (8) of the π-shaped connecting piece, and the height of the web is generally 60mm to 100mm. Made of Q345 steel. The lower end is connected with the upper flange of the upper limb (8) of the π-shaped connector through a steel plate with bolt holes through a 30mm long high-strength bolt (6) and a 70mm through high-strength bolt (12). The steel support is welded to the steel plate at its lower end. The steel bracing (11) mainly serves to improve the lateral rigidity and bearing capacity of the frame and to improve the energy dissipation capacity of the frame during an earthquake.

所述70mm贯通高强螺栓(12)为S8.8S或S10.3级高强螺栓。其上端位于预制钢支撑(11)底部节点板上表面,下端位于H型钢梁(3)上翼缘下表面。70mm贯通高强螺栓(12)连接了预制钢支撑(11)底部节点板、π形连接件上肢(8)以及H型钢梁(3)上翼缘。将三者连接成一个整体,同时将工字形板凳拉结钢筋(13)一侧卡在π形连接件上肢(8)腹板位置,起到连接工字形板凳拉结钢筋(13)与π形连接件(4)的作用。The 70mm through high-strength bolts (12) are S8.8S or S10.3-grade high-strength bolts. The upper end is located on the upper surface of the bottom gusset plate of the prefabricated steel support (11), and the lower end is located on the lower surface of the upper flange of the H-shaped steel beam (3). 70mm through high-strength bolts (12) are connected to the bottom gusset plate of the prefabricated steel support (11), the upper limb (8) of the π-shaped connecting piece and the upper flange of the H-shaped steel beam (3). Connect the three into a whole, and at the same time, clamp one side of the I-shaped bench tie steel bar (13) to the web position of the upper limb (8) of the π-shaped connector, so as to connect the I-shaped bench tie steel bar (13) with the π-shaped tie-tie steel bar (13). The role of the connector (4).

所述工字形板凳拉结钢筋(13)为一种预制成型三维钢筋笼。工字形板凳拉结钢筋(13)主要由横向拉结弓形钢筋网与纵向拉结筋两部分组成。横向拉结弓形钢筋网由两侧两根带锚固端的弓形钢筋以及中间横向连接钢筋构成。两侧弓形钢筋长80mm,直角锚固端长30mm。中间两根横向连接钢筋长70mm,间距60mm。两端通过点焊或绑扎的形式将弓形钢筋与其进行固定,形成一个预制成型三维钢筋网。横向拉结弓形钢筋网布置在柱两侧π形连接件上肢(8)腹板处。纵向拉结筋则由两根300mm长钢筋组成,与两端弓形钢筋网进行点焊,使柱两侧弓形钢筋网拉结在一起。工字形板凳拉结钢筋(13)两部分都采用HRB335Φ8钢筋组成,弓形钢筋网延伸至预制再生混凝土楼板(15)的预留孔中并和露出的楼板钢筋(16)进行绑扎,另一端通过70mm贯通高强螺栓(12)固定在π形连接件上肢(8)腹板位置,π形连接件上肢(8)腹板两侧对称布置两个工字形板凳拉结钢筋(13)。将其设计为“板凳”形有利于其与楼板钢筋(16)以及灌浆料之间的锚固,同时锚固端朝下可以垫高钢筋网使其与楼板钢筋(16)位于同一高度处便于绑扎。纵向拉结筋在将两端弓形钢筋网拉结在一起的同时与楼板钢筋(16)以及柱板拉结筋(2)进行绑扎使预制再生混凝土楼板(15)、π形连接件(4)以及轻型方钢管再生混凝土柱(1)形成一个统一的整体,有效的提高了节点域整体性。The I-shaped bench tie reinforcement bar (13) is a prefabricated three-dimensional reinforcement cage. The I-shaped bench-tie reinforcement bar (13) is mainly composed of two parts: a transversely-tie-tie bow-shaped steel mesh and a longitudinally-tie-tie bar. The transversely knotted bow-shaped steel mesh is composed of two bow-shaped steel bars with anchor ends on both sides and the middle transverse connecting steel bar. The length of the bow-shaped steel bars on both sides is 80mm, and the length of the right-angle anchoring end is 30mm. The two transverse connecting bars in the middle are 70mm long and 60mm apart. The two ends are fixed to the bow-shaped steel bar by spot welding or binding to form a prefabricated three-dimensional steel mesh. The transversely tied bow-shaped steel mesh is arranged at the webs of the upper limbs (8) of the π-shaped connecting pieces on both sides of the column. The longitudinal tie bars are composed of two 300mm long steel bars, which are spot welded with the bow-shaped steel meshes at both ends, so that the bow-shaped steel meshes on both sides of the column are tied together. The two parts of the I-shaped bench tie steel bar (13) are made of HRB335Φ8 steel bars. The bow-shaped steel bar mesh extends into the reserved holes of the prefabricated recycled concrete floor slab (15) and is bound with the exposed floor slab steel bar (16), and the other end passes through 70mm The through high-strength bolts (12) are fixed at the position of the web of the upper limb (8) of the π-shaped connecting piece, and two I-shaped bench tie bars (13) are symmetrically arranged on both sides of the web of the upper limb (8) of the π-shaped connecting piece. Designing it in the shape of a "bench" is conducive to the anchoring between it and the floor reinforcement (16) and the grouting material, and at the same time, the anchoring end facing down can elevate the steel mesh so that it is at the same height as the floor reinforcement (16) for easy binding. The longitudinal tie bars are tied together with the floor reinforcement bars (16) and the column-slab tie bars (2) while the bow-shaped steel meshes at both ends are tied together, so that the prefabricated recycled concrete floor slabs (15) and the π-shaped connectors (4) are bound together. And the light-weight square steel tube recycled concrete column (1) forms a unified whole, which effectively improves the integrity of the node domain.

灌浆料托板(14)为三边焊接有预埋锚固钢筋弯钩的薄钢板,其厚度为3mm,矩形钢板尺寸长为390mm,宽为110mm。略大于预制再生混凝土楼板(14)在此处预留的长370mm,宽100mm的灌浆孔洞。灌浆料托板(14)在预制再生混凝土楼板(15)成型前埋入预留孔洞下部,钢板上表面与楼板下表面以及π形连接件上肢(8)下翼缘上表面平齐。钢板外边缘与π形连接件上肢(8)下翼缘边缘吻合,因此可以保证灌浆料倒入后底部不漏浆。The grouting material pallet (14) is a thin steel plate welded with pre-embedded anchoring steel bar hooks on three sides, its thickness is 3mm, and the size of the rectangular steel plate is 390mm in length and 110mm in width. A grouting hole with a length of 370 mm and a width of 100 mm reserved here is slightly larger than the prefabricated recycled concrete floor slab (14). The grouting material pallet (14) is embedded in the lower part of the reserved hole before the prefabricated recycled concrete floor slab (15) is formed, and the upper surface of the steel plate is flush with the lower surface of the floor slab and the upper surface of the lower flange of the upper limb (8) of the π-shaped connector. The outer edge of the steel plate is matched with the edge of the lower flange of the upper limb (8) of the π-shaped connecting piece, so it can be ensured that the bottom of the grouting material will not leak after the grouting material is poured.

所述预制再生混凝土楼板(15)为工厂预制的钢筋混凝土楼板,其厚度味80mm~100mm与π形连接件上肢(8)、π形连接件下肢(9)高度相等,混凝土采用再生混凝土,混凝土强度为C40。根据设计要求内部配有单层或双层钢筋网一般采用HRB335级Φ8钢筋,钢筋间距为100mm。预制楼板在节点处为π形连接件上肢(8)预留长100mm、宽100mm灌浆孔,楼板上表面与π形连接件上肢(8)上翼缘表面平齐。灌浆孔内部放置板凳钢筋(14)后灌注高强灌浆料,使灌浆料填满预留孔洞以及π形连接件上肢(7)腹板两侧,从而达到楼板与装配式节点共同工作的目的。The prefabricated recycled concrete floor slab (15) is a factory-prefabricated reinforced concrete floor slab, and its thickness is 80 mm to 100 mm, which is the same height as the upper limb (8) of the π-shaped connector and the lower limb (9) of the π-shaped connector. Strength is C40. According to the design requirements, there is a single-layer or double-layer steel mesh inside. Generally, HRB335 grade Φ8 steel bars are used, and the spacing between the steel bars is 100mm. A grouting hole of 100 mm long and 100 mm wide is reserved for the upper limb (8) of the π-shaped connecting piece at the node of the prefabricated floor slab, and the surface of the floor slab is flush with the upper flange surface of the upper limb (8) of the π-shaped connecting piece. The bench steel bar (14) is placed inside the grouting hole and high-strength grouting material is poured, so that the grouting material fills the reserved hole and both sides of the web of the upper limb (7) of the π-shaped connector, so as to achieve the purpose of working together between the floor slab and the prefabricated node.

所述楼板钢筋(16)即为预制再生混凝土楼板(15)内配置的分布钢筋,预留孔洞处露出的分布钢筋起到与工字形板凳拉结钢筋(13)连接的作用。The floor reinforcement bars (16) are distributed reinforcement bars arranged in the prefabricated recycled concrete floor slab (15), and the distribution reinforcement bars exposed at the reserved holes serve to connect with the I-shaped bench tie reinforcement bars (13).

本发明涉及一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点及作法,其具体做法如下:The invention relates to a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connecting piece combined type middle column bottom node and a method, and the specific method is as follows:

第一步:工厂预制轻型方钢管再生混凝土柱(1)、柱板拉结筋(2),购买相应尺寸方钢管以及钢板,切割、打磨、开孔后在底部焊接基础连接板,随后在内部浇筑再生混凝土,经过养护完成方钢管再生混凝土柱(1)的制作。将制作完成的柱板拉结筋(2)焊接至轻型方钢管再生混凝土柱(1)两侧相应位置如图5所示。Step 1: Factory prefabricated lightweight square steel tube recycled concrete columns (1), column-plate tie bars (2), purchase square steel tubes and steel plates of corresponding sizes, cut, grind, and drill holes to weld the base connecting plate at the bottom, and then internally The recycled concrete is poured, and the production of the square steel tube recycled concrete column (1) is completed after curing. The fabricated column-slab tie bars (2) are welded to the corresponding positions on both sides of the light-duty square steel tube recycled concrete column (1) as shown in Figure 5.

第二步:在工厂车间加工π形连接件(4)以及腹板连接板(5),先购买相应尺寸的成品热轧工字钢梁,进行切割、打磨、打孔等制作成π形连接件上肢(8)、π形连接件下肢(9),将相应厚度热轧钢板切割、开孔,制作成矩形底板(10)。将π形连接件上肢(8)、π形连接件下肢(9)与矩形底板(10)进行焊接,制作成π形连接件(4)。购买相应尺寸与强度的钢板进行切割、开孔后制作成腹板连接板(5)。如图6所示。Step 2: Process the π-shaped connector (4) and the web connecting plate (5) in the factory workshop, first purchase the finished hot-rolled I-beam of the corresponding size, and cut, grind, punch, etc. to make the π-shaped connection. The upper limb (8) of the piece and the lower limb (9) of the π-shaped connecting piece are cut and drilled from a hot-rolled steel plate of a corresponding thickness to make a rectangular bottom plate (10). The upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece are welded with the rectangular bottom plate (10) to manufacture the π-shaped connecting piece (4). Purchase a steel plate of corresponding size and strength to cut and open the holes to make a web connecting plate (5). As shown in Figure 6.

第三步:在工厂车间将π形连接件(4)以及腹板连接板(5)焊接至轻型方钢管再生混凝土柱(1)的两侧相应位置。首先将π形连接件(4)焊接至轻型方钢管再生混凝土柱(1)上,应注意π形连接件(4)通过外侧角焊缝及内侧角焊缝与轻型方钢管再生混凝土柱(1)侧面贴焊连接,因此π形连接件(4)通过两圈矩形满焊角焊缝与方钢管柱连接这样充分保证了焊缝长度,充分满足节点处焊缝的抗剪承载力与抗弯承载力。然后将腹板连接板(5)通过矩形底板(10)中心孔洞焊接至方钢管柱上。将螺母焊接至π形连接件上肢(8)、π形连接件下肢(9)螺栓孔位置以备安装螺栓。如图7所示。The third step: welding the π-shaped connecting piece (4) and the web connecting plate (5) to the corresponding positions on both sides of the light-duty square steel tube recycled concrete column (1) in the factory workshop. First, weld the π-shaped connector (4) to the light-weight square steel tube recycled concrete column (1). It should be noted that the π-shaped connector (4) is connected to the light-weight square steel tube recycled concrete column (1) through the outer and inner fillet welds. ) side welding connection, so the π-shaped connector (4) is connected to the square steel pipe column through two rounds of rectangular full-welded fillet welds, which fully guarantees the length of the weld and fully meets the shear bearing capacity and bending resistance of the weld at the node. carrying capacity. Then, the web connecting plate (5) is welded to the square steel tube column through the central hole of the rectangular bottom plate (10). Weld the nuts to the positions of the bolt holes of the upper limb (8) of the π-shaped connector and the lower limb (9) of the π-shaped connector to prepare for installing the bolts. As shown in Figure 7.

第四步:设置一道加劲肋焊接在H型钢梁(3)上,加劲肋厚度不小于H型钢梁(3)腹板厚度。按照设计位置加工H型钢梁(3)上下翼缘与腹板螺栓孔。最后在H型钢梁(3)顶面焊接栓钉。如图8所示。Step 4: A stiffening rib is arranged to be welded on the H-shaped steel beam (3), and the thickness of the stiffening rib is not less than the thickness of the web of the H-shaped steel beam (3). Process the upper and lower flanges and web bolt holes of the H-beam (3) according to the design position. Finally, the studs are welded on the top surface of the H-beam (3). As shown in Figure 8.

第五步:工厂加工预制钢支撑(11),购买符合截面尺寸要求的热轧H型钢,打磨、切削成相应尺寸。购买钢板,经过切割、打磨、开孔等工序,加工制作钢支撑底部节点板。将加工成型的钢支撑焊接到底部节点板上。预制钢支撑加工完成。如图9所示。Step 5: The factory processes the prefabricated steel support (11), purchases hot-rolled H-beams that meet the cross-sectional size requirements, and grinds and cuts them into corresponding sizes. Purchase steel plates, and process the bottom gusset plate of steel support after cutting, grinding, drilling and other processes. Weld the machined steel supports to the bottom gusset plate. Prefabricated steel supports are finished. As shown in Figure 9.

第六步:制作灌浆料托板(14)和预制再生混凝土楼板(15),工厂购买成品钢板切割成相应尺寸,通过切割、弯折等工序加工灌浆料托板(14)上的锚固用钢筋弯钩,将钢筋弯钩点焊到钢板上加工完成灌浆料托板。制作、绑扎楼板钢筋,支楼板模板,将灌浆料托板放置在开洞处,浇筑楼板再生混凝土,养护成型。如图10所示。Step 6: Make the grouting material pallet (14) and the prefabricated recycled concrete floor slab (15), the factory purchased finished steel plates and cut them into corresponding sizes, and process the steel bars for anchoring on the grouting material pallet (14) through processes such as cutting and bending. Hook, spot welding the steel bar hook to the steel plate to complete the grouting material pallet. Make and bind the steel bars of the floor slab, support the floor slab formwork, place the grouting material pallet at the opening, pour the recycled concrete of the floor slab, and maintain the molding. As shown in Figure 10.

第七步:在施工现场安装带有π形连接件(4)及腹板连接板(5)的轻型方钢管再生混凝土柱(1),将钢管混凝土柱通过基础连接板安装至基础上。在H型钢梁(6)端部上下切割长约5mm的三角形缺口,将H型钢梁(3)滑入两侧方钢管柱π形连接件(4)之间,使π形连接件(4)及腹板连接板(5)上的螺栓孔与H型钢梁(3)螺栓孔对正,用高强螺栓拧紧固定。如图11所示。Step 7: Install the light-duty square steel tube recycled concrete column (1) with the π-shaped connector (4) and the web connecting plate (5) on the construction site, and install the steel tube concrete column to the foundation through the foundation connecting plate. Cut a triangular notch with a length of about 5mm at the upper and lower ends of the H-shaped steel beam (6), and slide the H-shaped steel beam (3) between the π-shaped connecting pieces (4) of the steel pipe columns on both sides, so that the π-shaped connecting pieces ( 4) and the bolt holes on the web connecting plate (5) are aligned with the bolt holes of the H-beam (3), and fasten them with high-strength bolts. As shown in Figure 11.

第八步:将预制再生混凝土楼板安装到相应位置。如图12所示。Step 8: Install the prefabricated recycled concrete floor slab into the corresponding position. As shown in Figure 12.

第九步:将预制钢支撑(11)通过高强螺栓安装到相应位置上。如图13所示。Step 9: Install the prefabricated steel support (11) to the corresponding position through high-strength bolts. As shown in Figure 13.

第十步:将工字形板凳拉结钢筋(13)放置到相应位置,拧紧70mm贯通高强螺栓(13)将工字形板凳拉结钢筋(13)固定在π形连接件上肢(8)腹板位置。并将工字形板凳拉结钢筋(13)两端横向弓形拉结筋绑扎到楼板钢筋(16)上。将纵向拉结筋与柱板拉结筋(2)以及楼板钢筋(16)进行绑扎。如图14所示。Step 10: Place the I-shaped bench tie bars (13) at the corresponding positions, and tighten the 70mm through high-strength bolts (13) to fix the I-shaped bench tie bars (13) at the web position of the upper limb (8) of the π-shaped connector . The transverse bow-shaped tie bars at both ends of the I-shaped bench tie bars (13) are bound to the floor steel bars (16). Bind the longitudinal tie bars to the column-slab tie bars (2) and the floor reinforcement bars (16). As shown in Figure 14.

第十一步:在楼板抗剪栓钉(7)、π形连接件上肢(8)、工字形板凳拉结钢筋(13)以及灌浆料托板(14)等位置浇筑高强灌浆料,待养护完成即可进行后续施工。如图15所示。The eleventh step: pour high-strength grouting material on the floor shear studs (7), the upper limbs of the π-shaped connectors (8), the I-shaped bench tie bars (13), and the grouting material pallets (14), etc. After completion, subsequent construction can be carried out. As shown in Figure 15.

与现有技术相比,本发明涉及一种适于钢管混凝土柱-H型钢梁-钢支撑连接的π形连接件中柱底部节点及作法,具有以下优势:Compared with the prior art, the present invention relates to a π-shaped connector mid-column bottom node and method suitable for CFST column-H-shaped steel beam-steel support connection, and has the following advantages:

1、本发明创造性的采用π形连接件(4)这一构造进行梁柱间的装配连接:π形连接件(4)增大了梁柱节点域高度,提高了节点抗剪承载力。同时中心开孔的矩形底板(9)贴焊在轻型方钢管再生混凝土柱(1)上使节点处柱壁钢材不会直接暴露在空气中,提高了节点抗腐蚀性能。整个节点有较强的受弯、受剪承载能力。同时π形连接件只需要在有梁的一侧进行布置,同一柱上不同位置的π形连接件并不连续。如中柱两侧π连接件无直接联系,其中一侧节点失效,另一侧节点不会受到影响。降低了结构连续倒塌的风险。1. The present invention creatively adopts the structure of the π-shaped connector (4) to assemble and connect between beams and columns: the π-shaped connector (4) increases the height of the beam-column joint domain and improves the joint shear bearing capacity. At the same time, the rectangular bottom plate (9) with the central hole is welded to the light-weight square steel tube recycled concrete column (1), so that the steel of the column wall at the node is not directly exposed to the air, and the corrosion resistance of the node is improved. The entire node has strong bending and shear bearing capacity. At the same time, the π-shaped connectors only need to be arranged on the side with the beam, and the π-shaped connectors at different positions on the same column are not continuous. If there is no direct connection between the π connectors on both sides of the central column, one node on one side fails, and the node on the other side will not be affected. The risk of successive collapse of the structure is reduced.

2、本发明创造性的将节点连接构造与钢支撑构造进行装配:π形连接件(4)中π形连接件上肢(8)上翼缘开螺栓孔与预制钢支撑(11)的底部连接板采用螺栓进行连接。这种构造形式使钢支撑在框架装配式阶段即可进行装配,无需后期增设其他部件即可进行支撑安装。大大简化了施工步骤,节省成本且提高了施工效率。2. The present invention creatively assembles the node connection structure and the steel support structure: bolt holes are opened on the upper flange of the upper limb (8) of the π-shaped connector (4) and the bottom connecting plate of the prefabricated steel support (11). Connect with bolts. This form of construction enables the steel supports to be assembled at the frame assembly stage, and supports installation without the need for additional components at a later stage. It greatly simplifies construction steps, saves costs and improves construction efficiency.

3、本发明创造性的将装配式楼板通过板凳拉结筋钢筋、柱板拉结筋实现了板-柱-节点域以及中柱两侧节点域的整体化设计:预制再生混凝土楼板(15)在与π形连接件上肢(8)连接部位开孔,内部露出楼板钢筋(16),楼板钢筋(16)与工字形板凳拉结钢筋(13)进行绑扎。工字形板凳拉结钢筋(13)通过70mm贯通高强螺栓(12)与π形连接件上肢(8)进行固定。最后在开洞部位浇筑高强灌浆料,即形成了预制楼板-板凳形拉结钢筋-π形连接件连接构造。3. The invention creatively realizes the integrated design of the plate-column-node domain and the node domains on both sides of the central column by using the bench tie bars and column-slab tie bars for the prefabricated floor slab: the prefabricated recycled concrete floor slab (15) is in the A hole is opened at the connection part with the upper limb (8) of the π-shaped connecting piece, and the floor steel bar (16) is exposed inside, and the floor steel bar (16) is bound with the I-shaped bench tie steel bar (13). The I-shaped bench tie steel bar (13) is fixed to the upper limb (8) of the π-shaped connecting piece through a 70mm through high-strength bolt (12). Finally, high-strength grouting material is poured at the opening, which forms the connection structure of prefabricated floor slab-bench-shaped tie-bar-π-shaped connector.

同时板凳形拉结钢筋纵向钢筋与板柱拉结钢筋进行绑扎,并通过灌浆料将楼板与轻型钢管混凝土柱进行拉结,增强了板-柱-节点域协调变形能力。同时,纵向钢筋构造将中柱两侧π形连接件上肢(8)进行有效拉结,提高了中柱两侧节点域整体性,一定程度上提高了板柱-节点域的延性。At the same time, the longitudinal steel bars of the bench-shaped tie bars are bound with the slab-column tie bars, and the floor slabs and the light-weight CFST columns are tied through the grouting material, which enhances the coordinated deformation ability of the slab-column-joint domain. At the same time, the longitudinal reinforcement structure effectively ties the upper limbs (8) of the π-shaped connectors on both sides of the central column, which improves the integrity of the node domains on both sides of the central column and improves the ductility of the slab-column-node domain to a certain extent.

同时,π形连接件内部灌注钢管灌浆料后大大增强了其抗弯、抗压能力及稳定性。进一步保证了钢支撑与π形节点连接构造的可靠性。At the same time, the π-shaped connector is filled with steel pipe grouting material, which greatly enhances its bending resistance, compression resistance and stability. This further ensures the reliability of the connection structure between the steel support and the π-shaped node.

4、本发明创造性的实现了中柱位置楼板的整体安装,在装配式传统钢结构房屋中,由于梁柱节点区域构造较为复杂,很难实现中柱梁柱节点区域楼板的整体化装配,只能在该区域将楼板进行分割拼装,这极大地削弱了楼板整体性以及节点与楼板组合工作的性能。该发明中由于楼板和节点π形连接件是整体浇筑的,通过在楼板上预留孔洞可以跨中柱装配在两侧的H型钢梁上,通过板凳形拉结钢筋以及板柱拉结筋有效的将节点-柱-板结合为一个整体。节点处刚度大大提高,节点在复杂状态下承载力提升。同时将原中柱节点处的2~4块楼板装配量降低到了1块,大大提升了施工效率。4. The present invention creatively realizes the overall installation of the floor slab at the central column position. In the prefabricated traditional steel structure house, because the structure of the beam-column node area is relatively complex, it is difficult to realize the integral assembly of the floor slab in the central column beam-column node area. The slab can be split and assembled in this area, which greatly weakens the integrity of the slab and the performance of the joint and slab combination work. In this invention, since the floor slab and the π-shaped connector of the node are integrally cast, the mid-span column can be assembled on the H-shaped steel beams on both sides by reserving holes in the floor slab, and the bench-shaped tie bars and the slab-column tie bars can be used. Effectively combines the node-column-plate as a whole. The stiffness of the joint is greatly improved, and the bearing capacity of the joint is improved in a complex state. At the same time, the assembly quantity of 2 to 4 slabs at the original central column node was reduced to 1, which greatly improved the construction efficiency.

5、利于房屋防水、防潮,便于保温、防水等构造的施工。本发明中预制楼板装配位置位于基础以上300mm处,底部与基础隔开,更利于房屋一层防水防潮。同时该节点的上翼缘π形连接件与楼板浇筑在一起,方便了外部墙体及保温结构的安装,一定程度上避免了冷桥产生,利于房屋保温节能。5. It is conducive to the construction of waterproof and moisture-proof houses, and it is convenient for the construction of thermal insulation and waterproof structures. In the present invention, the assembly position of the prefabricated floor slab is located 300mm above the foundation, and the bottom is separated from the foundation, which is more conducive to the waterproofing and moisture-proofing of the first floor of the house. At the same time, the π-shaped connector of the upper flange of the node is poured together with the floor slab, which facilitates the installation of the external wall and the thermal insulation structure, avoids the generation of cold bridges to a certain extent, and is conducive to thermal insulation and energy saving of the house.

6、受力明确,具备两道抗震防线。本发明涉及的节点连接构造设计简便、可靠度高。工字形截面梁将建筑荷载传递给梁柱节点,工字形截面梁的轴力、剪力及弯矩通过螺栓传递给π形连接件及腹板连接板,最终由矩形底板及腹板连接板的焊缝实现二者与钢管柱的作用力传递。因此通过控制焊缝长度及钢材厚度即可完成不同荷载作用下的节点设计,其设计可靠性更加明确。在地震往复荷载作用下π形连接件作为第一道防线耗散大部分地震能量,π形连接件失效后腹板连接板仍可承担剪力与弯矩作用,整个节点仍可继续工作。这对于装配式结构地震作用下抗连续倒塌及震后修复具有积极意义。6. The force is clear, with two anti-seismic defense lines. The node connection structure involved in the present invention is simple in design and high in reliability. The I-shaped section beam transfers the building load to the beam-column joint, and the axial force, shear force and bending moment of the I-shaped section beam are transmitted to the π-shaped connecting piece and the web connecting plate through the bolts, and finally the rectangular bottom plate and the web connecting plate are connected. The welding seam realizes the force transmission between the two and the steel pipe column. Therefore, the joint design under different loads can be completed by controlling the length of the weld and the thickness of the steel, and its design reliability is more clear. Under the action of seismic reciprocating load, the π-shaped connector acts as the first line of defense to dissipate most of the seismic energy. After the failure of the π-shaped connector, the web connecting plate can still bear the shear force and bending moment, and the entire node can continue to work. This has positive significance for the anti-continuous collapse and post-earthquake repair of the fabricated structure under the action of earthquake.

7、装配化程度高、工业化水平高。本发明涉及的方钢管再生混凝土柱、π形连接件、腹板连接板、H型钢梁等均可以在工程预制,施工现场拼装。工程规模化生产精度高、质量控制严格、节省资源。减少了施工现场焊接与湿作业工作量,可针对不同梁柱截面生产出标准统一、规格不同的标准件进行拼装,有利于实现住宅产业化。7. High degree of assembly and high level of industrialization. The square steel tube recycled concrete column, the π-shaped connecting piece, the web connecting plate, the H-shaped steel beam, etc. involved in the present invention can all be prefabricated in engineering and assembled on the construction site. The large-scale production of the project has high precision, strict quality control and resource saving. The workload of welding and wet work at the construction site is reduced, and standard parts with unified standards and different specifications can be produced for different beam and column sections for assembly, which is conducive to the realization of residential industrialization.

8、节能环保、运输方便。本发明涉及的预制连接件耗钢量少,采用再生混凝土等环保节能材料,节点组件多采用热轧型钢,材料易得并且可以基本实现无废料。本发明提出的节点构造作法将容易造成噪声污染、光污染的工序放在工厂进行,在保证施工质量的同时,可以做到绿色环保。8. Energy saving and environmental protection, convenient transportation. The prefabricated connecting piece involved in the present invention consumes less steel, adopts recycled concrete and other environment-friendly and energy-saving materials, and mostly adopts hot-rolled section steel for node components, which is easy to obtain and can basically realize no waste. The node construction method proposed by the present invention places the processes that are likely to cause noise pollution and light pollution in the factory, and can achieve green environmental protection while ensuring the construction quality.

附图说明Description of drawings

图1节点构造拆解图。Figure 1. The disassembly diagram of the node structure.

图2节点整体俯视图。Figure 2. Overall top view of the node.

图3节点整体轴测图。Figure 3. The overall axonometric view of the node.

图4节点整体仰视图。Figure 4 Overall bottom view of the node.

图5步骤1—制作再生钢管混凝土柱。Figure 5 Step 1 - Fabrication of recycled concrete-filled steel tubular columns.

图6步骤2—制作π形连接件与腹板连接板。Figure 6 Step 2 - Making the pi-connector and web connection plate.

图7步骤3—焊接π形连接件。Figure 7 Step 3 - Soldering the Pi Connector.

图8步骤4—制作工字钢底梁。Figure 8 Step 4 - Making the I-Beam Bottom Beam.

图9步骤5—制作钢支撑。Figure 9 Step 5 - Making the Steel Support.

图10步骤6—制作预制再生混凝土楼板。Figure 10 Step 6 - Making Precast Recycled Concrete Floor Slabs.

图11步骤7—装配梁柱。Figure 11 Step 7 - Assemble the beam and column.

图12步骤8—装配楼板。Figure 12 Step 8 - Assemble the floor.

图13步骤9—装配钢支撑。Figure 13 Step 9 - Assemble the Steel Support.

图14步骤10—绑扎固定板凳钢筋。Figure 14 Step 10 - Binding and fixing the bench steel bars.

图15步骤11—浇筑灌浆料。Figure 15 Step 11—Pour the grout.

具体实施方式Detailed ways

下面结合具体实施例对发明做进一步说明。The invention will be further described below with reference to specific embodiments.

如图3所示,一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,该节点包括轻型方钢管再生混凝土柱(1)、柱板拉结筋(2)、H型钢梁(3)、π形连接件(4)、腹板连接板(5)、30mm长高强螺栓(6)、楼板抗剪栓钉(7)、π形连接件上肢(8)、π形连接件下肢(9)、矩形底板(10)、预制钢支撑(11)、70mm贯通高强螺栓(12)、工字形板凳拉结钢筋(13)、灌浆料托板(14)、预制再生混凝土楼板(15)以及楼板钢筋(16)。As shown in Fig. 3, a CFST column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node, the node includes a light-weight square steel tube recycled concrete column (1), a column-plate tie bar ( 2), H-shaped steel beams (3), π-shaped connectors (4), web connecting plates (5), 30mm long high-strength bolts (6), floor shear studs (7), upper limbs of π-shaped connectors ( 8), the lower limb of the π-shaped connector (9), the rectangular bottom plate (10), the prefabricated steel support (11), the 70mm through high-strength bolts (12), the I-shaped bench tie bars (13), the grouting material support plate (14) , a prefabricated recycled concrete floor slab (15) and a floor slab reinforcement (16).

根据建筑荷载大小可对方钢管再生混凝土柱所需承载力进行计算,通过调整钢管外径、厚度以及再生混凝土强度等对方钢管再生混凝土柱进行调整。根据H型钢梁端的弯矩和剪力对π形连接件的上下翼缘连接件的翼缘与腹板厚度、梁高、悬挑长度等主要参数进行设计,确定矩形底板的长度与厚度以及中心开孔尺寸等。同时根据H型钢梁端轴力、剪力与弯矩调整腹板连接板长度与厚度,计算节点域所需螺栓数量以及焊缝长度等。本发明所涉及梁柱节点可通过上述参数设计变化控制节点连接刚度,实现刚性节点或半刚性节点的设计目标。According to the size of the building load, the bearing capacity of the steel tube recycled concrete column can be calculated, and the steel tube recycled concrete column can be adjusted by adjusting the outer diameter, thickness and strength of the recycled concrete of the steel tube. According to the bending moment and shear force at the end of the H-shaped steel beam, the main parameters such as flange and web thickness, beam height, and cantilever length of the upper and lower flange connectors of the π-shaped connector are designed, and the length and thickness of the rectangular bottom plate are determined. Center opening size, etc. At the same time, according to the axial force, shear force and bending moment of the H-beam end, adjust the length and thickness of the web connecting plate, and calculate the number of bolts and weld length required in the node domain. The beam-column joints involved in the present invention can control the joint connection stiffness through the above-mentioned parameter design changes, so as to achieve the design goal of rigid joints or semi-rigid joints.

根据楼面荷载设计楼板厚度、混凝土强度、分布钢筋直径、分布钢筋间距等参数。根据π形连接件尺寸以及梁上抗剪螺栓布置确定预留孔洞位置及大小。Design parameters such as floor thickness, concrete strength, distribution bar diameter, distribution bar spacing and other parameters according to the floor load. Determine the location and size of the reserved holes according to the size of the π-shaped connector and the arrangement of the shear bolts on the beam.

根据结构抗震设计相关理论,确定预制钢支撑截面尺寸以及布置角度等参数。以上数据确定后即可进行性下料、生产、施工、装配等程序。According to the relevant theory of structural seismic design, parameters such as section size and arrangement angle of prefabricated steel bracing are determined. After the above data is determined, the process of blanking, production, construction and assembly can be carried out.

根据轻型钢管再生混凝土柱截面宽度以及预制楼板开洞大小设计板柱拉结钢筋以及板凳形拉结钢筋。According to the section width of the recycled concrete column of the light steel tube and the size of the opening of the prefabricated floor, the plate-column tie-bar and the bench-shaped tie-bar are designed.

在正常使用阶段,π形连接件增大了梁柱节点域的高度,因此本发明所述节点在弹性工作阶段具有较大的刚度,有效控制了工字型截面梁的变形,在正常使用状态下避免了梁挠度过大以及外界震动荷载激励下梁震幅过大的缺陷。In the normal use stage, the π-shaped connector increases the height of the beam-column joint domain, so the joint of the present invention has greater stiffness in the elastic working stage, effectively controlling the deformation of the I-shaped section beam, and in the normal use state It avoids the defects of excessive beam deflection and excessive beam vibration amplitude excited by external vibration loads.

同时,本节点中楼板与π形连接件通过板凳形以及高强螺栓等构造进行了有效连接,后期浇筑灌浆料后更是对π形连接件进行了强化。π形连接件上肢因与底梁和钢支撑二者同时连接,其上翼缘受到钢支撑传来的局部压力以及剪力,下翼缘受到底梁传来的轴力、弯矩和剪力,整体处于复杂应力状态。腹板周围浇筑灌浆料后极大的提升了其局部承压性能以及抗剪承载力。因此节点域的抗弯刚度得到提升,抗剪承载力提高。通过板凳形拉结钢筋与板柱拉结钢筋增强板-柱-节点整体性以及两侧节点域的整体性。At the same time, the floor slab and the π-shaped connector in this node are effectively connected through bench-shaped and high-strength bolts and other structures, and the π-shaped connector is strengthened after the grouting is poured in the later stage. Because the upper limb of the π-shaped connector is connected with both the bottom beam and the steel support at the same time, the upper flange is subjected to the local pressure and shear force from the steel support, and the lower flange is subjected to the axial force, bending moment and shear force from the bottom beam. stress state. After the grouting material is poured around the web, its local pressure bearing performance and shear bearing capacity are greatly improved. Therefore, the flexural stiffness of the node domain is improved, and the shear capacity is improved. The integrity of the plate-column-joint and the integrity of the joint domains on both sides is enhanced by the bench-shaped tie-bar and the slab-column tie-bar.

同时,为满足“强节点弱构件”的设计原则,即加强梁柱节点并使节点所连接的工字形钢梁先于节点破坏。本发明所涉及的梁柱节点,π形连接件与腹板连接板与方钢管再生混凝土柱使用焊接连接,与H型钢梁采用螺栓连接,当梁端剪力与弯矩传递至螺栓与焊缝后,螺栓剪断与焊缝开裂均为脆性破坏。因此需要在设计阶段保证焊缝与螺栓有充足的安全储备。节点的破坏形式应设计为梁端变形破坏,地震作用下钢梁破坏位置集中于梁翼缘螺栓孔处,此处钢梁翼缘截面将会经历从屈服到断裂的过程,这是一个较为缓慢的、有显著变形的过程,具有理想的延性破坏特征。本发明所述节点在地震作用主要耗能区域为π形连接件,在往复荷载作用下π形连接件上下工字钢悬挑短梁的翼缘发生变形从而消耗部分地震能量,上下工字钢悬挑短梁的腹板将发挥加劲肋的作用,形成连接梁端的拉压杆桁架体系,在控制节点变形的同时也会消耗部分地震能量。随着水平地震作用的增大作为节点第一道抗震防线的π形连接件失效,腹板连接板作为第二道抗震防线仍会继续工作防止工字形钢梁坍塌。此时节点区域楼板相互挤压,梁端楼板和墙之间的裂缝变宽甚至完全开裂,此过程持续时间较长,利于人员疏散。由于不同梁柱节点之间没有直接关联,某一节点失效不会引起该处其他节点失效,因此符合“强柱弱梁”的设计原则。At the same time, in order to meet the design principle of "strong joints and weak members", that is, to strengthen the beam-column joints and make the I-shaped steel beams connected to the joints fail before the joints. In the beam-column joint involved in the present invention, the π-shaped connecting piece is connected with the web connecting plate and the square steel tube recycled concrete column by welding, and is connected with the H-shaped steel beam by bolts. After welding, bolt shearing and weld cracking are both brittle failures. Therefore, it is necessary to ensure sufficient safety reserves for welds and bolts in the design stage. The failure mode of the joint should be designed as the deformation failure of the beam end. The failure position of the steel beam under the action of the earthquake is concentrated at the bolt hole of the beam flange, where the section of the steel beam flange will experience the process from yielding to fracture, which is a relatively slow and significant process. The deformation process has ideal ductile failure characteristics. The node of the present invention is a π-shaped connector in the main energy-consuming area of earthquake action. Under the action of reciprocating load, the flanges of the upper and lower I-beam cantilever short beams of the π-shaped connector are deformed to consume part of the seismic energy. The web of the cantilevered short beam will act as a stiffener to form a tension-compression rod truss system connecting the beam ends, which will consume part of the seismic energy while controlling the deformation of the joints. With the increase of the horizontal seismic action, the π-shaped connector, which is the first seismic defense line of the node, fails, and the web connecting plate, as the second seismic defense line, will continue to work to prevent the I-shaped steel beam from collapsing. At this time, the floor slabs in the node area are pressed against each other, and the crack between the beam end floor slab and the wall becomes wider or even completely cracked. This process lasts for a long time, which is conducive to the evacuation of personnel. Since there is no direct relationship between different beam-column nodes, failure of one node will not cause failure of other nodes at that location, so it conforms to the design principle of "strong column and weak beam".

采用本发明所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点连接牢固、整体性好、装配便捷、绿色环保,是适用于低、多轻钢框架及轻钢桁架住宅建筑体系梁柱装配一种新型节点连接型式。Adopting the concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connecting piece of the present invention has the advantages of firm connection at the bottom of the middle column, good integrity, convenient assembly, and green environmental protection. Steel frame and light steel truss residential building system beam-column assembly is a new type of node connection.

以上是本发明的一个典型实施例,本发明的实施不限于此。The above is a typical embodiment of the present invention, and the implementation of the present invention is not limited thereto.

Claims (10)

1.一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:柱板拉结筋(2)焊接在轻型方钢管再生混凝土柱(1)上用于连接预制再生混凝土楼板(15);π形连接件(4)由π形连接件上肢(8)、π形连接件下肢(9)以及矩形底板(10)组成,其中矩形底板(10)为一中间开矩形孔的钢板,π形连接件上肢(8)、π形连接件下肢(9)分别满焊焊接在矩形底板(10)上;轻型方钢管再生混凝土柱(1)与π形连接件(4)焊接,利用π形连接件(4)上矩形底板(10)的外边缘四边与轻型方钢管再生混凝土柱(1)钢管壁焊接形成外缘四条角焊缝,矩形底板(10)的内侧开孔出的四条边与轻型方钢管再生混凝土柱(1)钢管壁焊接形成内缘四条角焊缝,轻型方钢管再生混凝土柱(1)与单个π形连接件(4)通过内侧与外侧共八条角焊缝相连;腹板连接板(5)通过两条直角角焊缝透过矩形底板(10)内侧开孔与轻型方钢管再生混凝土柱(1)钢管壁焊接;H型钢梁(3)上下翼缘与π形连接件(4)的π形连接件上肢(8)、π形连接件下肢(9)通过30mm长高强螺栓(6)进行连接;H型钢梁(3)腹板与腹板连接板(5)通过30mm长高强螺栓(6)进行连接;预制钢支撑(11)通过30mm长高强螺栓(6)与70mm贯通高强螺栓(12)与π形连接件上肢(8)连接;预制再生混凝土楼板(15)通过楼板抗剪栓钉(7)以及高强灌浆料与H型钢梁(3)连接;预制再生混凝土楼板(15)通过柱板拉结筋(2)、工字形板凳拉结钢筋(13)、楼板钢筋(16)相互绑扎最后通过高强浇筑灌浆料相连;灌浆料托板(14)预埋在预制再生混凝土楼板(15)中;工字形板凳拉结钢筋(13)通过70mm贯通高强螺栓(12)固定在π形连接件上肢(8)的腹板处,并与楼板钢筋(16)进行绑扎,浇筑高强灌浆料后使π形连接件上肢(8)与预制再生混凝土楼板(15)形成一体。1. a concrete-filled steel tube column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node, is characterized in that: the column plate tie bar (2) is welded on the light-duty square steel tube recycled concrete column (1) The upper part is used to connect the prefabricated recycled concrete floor slab (15); the π-shaped connecting piece (4) is composed of the upper limb (8) of the π-shaped connecting piece, the lower limb (9) of the π-shaped connecting piece and the rectangular bottom plate (10), wherein the rectangular bottom plate (10 ) is a steel plate with a rectangular hole in the middle, the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece are fully welded on the rectangular bottom plate (10) respectively; The four corners of the outer edge of the rectangular bottom plate (10) on the π-shaped connector (4) are welded with the light-duty square steel pipe recycled concrete column (1) to weld the steel pipe wall to form four fillet welds on the outer edge, and the rectangular bottom plate ( 10) The four sides of the inner side opening are welded with the light-weight square steel pipe recycled concrete column (1) to form four fillet welds on the inner edge, and the light-weight square steel pipe recycled concrete column (1) and a single π-shaped connector (4) pass through The inner side and the outer side are connected with a total of eight fillet welds; the web connecting plate (5) is welded to the steel pipe wall of the light-weight square steel pipe recycled concrete column (1) through two right-angle fillet welds through the inner opening of the rectangular bottom plate (10); The upper and lower flanges of the steel beam (3) are connected with the upper limb (8) and the lower limb (9) of the π-shaped connecting piece of the π-shaped connecting piece (4) by 30mm long high-strength bolts (6); the H-shaped steel beam ( 3) The web and the web connecting plate (5) are connected by 30mm long high-strength bolts (6); the prefabricated steel support (11) is connected by 30mm long high-strength bolts (6) and 70mm through high-strength bolts (12) and π-shaped connectors The upper limb (8) is connected; the prefabricated recycled concrete floor slab (15) is connected with the H-shaped steel beam (3) through the floor shear bolts (7) and the high-strength grouting material; the prefabricated recycled concrete floor slab (15) is connected by the column-slab tie bars ( 2), the I-shaped bench tie steel bars (13) and the floor steel bars (16) are bound to each other and finally connected by high-strength pouring grouting material; the grouting material support plate (14) is pre-buried in the prefabricated recycled concrete floor slab (15); the I-shaped bench The tie reinforcement (13) is fixed at the web of the upper limb (8) of the π-shaped connector by 70mm through high-strength bolts (12), and is bound with the floor reinforcement (16). After high-strength grouting is poured, the upper limb of the π-shaped connector is made (8) It is integrated with the prefabricated recycled concrete floor slab (15). 2.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述的轻型方钢管再生混凝土柱(1)中的方钢管采用方形热轧无缝钢管;内填再生混凝土。2. A kind of CFST column according to claim 1-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node, is characterized in that: described light-duty square steel tube recycled concrete column (1) The square steel pipe in the middle adopts square hot-rolled seamless steel pipe; the inside is filled with recycled concrete. 3.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述柱板拉结筋(2)为带有弯折锚固端的钢筋。3. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node according to claim 1, is characterized in that: described column-plate tie bars (2) are belts Rebar with bent anchor ends. 4.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述H型钢梁(3)是轻钢框架结构中的承重构件;轻钢组合结构中采用热轧H型钢梁作为主梁或次梁。4. A kind of CFST column according to claim 1-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node, it is characterized in that: described H-shaped steel beam (3) is light steel The load-bearing member in the frame structure; in the light steel composite structure, the hot-rolled H-beam is used as the main beam or the secondary beam. 5.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述腹板连接板(5)为矩形钢板,长度与π形连接件上肢(8)、π形连接件下肢(9)长度相同,宽度为矩形底板(10)矩形孔洞高度的80%,厚度等于H型钢梁(3)腹板厚度;腹板连接板(5)一侧通过两条垂直角焊缝,透过矩形底板(9)中心的矩形孔洞垂直焊接在轻型方钢管再生混凝土柱(1)柱壁上;腹板连接板(4)通过、30mm长高强螺栓(6)与H型钢梁(3)腹板相连。5. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node according to claim 1, characterized in that: the web connecting plate (5) is a rectangular steel plate , the length is the same as the length of the upper limb (8) of the π-shaped connecting piece and the lower limb (9) of the π-shaped connecting piece, the width is 80% of the height of the rectangular hole of the rectangular bottom plate (10), and the thickness is equal to the thickness of the web of the H-shaped steel beam (3); One side of the web connecting plate (5) is vertically welded to the column wall of the light-weight square steel tube recycled concrete column (1) through two vertical fillet welds through the rectangular hole in the center of the rectangular bottom plate (9); the web connecting plate (4) ) is connected to the web of the H-beam (3) through a 30mm long high-strength bolt (6). 6.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述楼板抗剪栓钉(7)是加强H型钢梁(3)与装配式混凝土板连接的构造充当楼板抗剪键,预制再生混凝土楼板(15)装配完成后在楼板抗剪栓钉(7)预留孔洞处浇筑高强灌浆料,完成H型钢梁(3)与预制再生混凝土楼板(15)的连接。6. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connecting piece combined type middle column bottom node according to claim 1, is characterized in that: described floor slab shear studs (7) are reinforced The structure connecting the H-shaped steel beam (3) with the prefabricated concrete slab acts as a floor shear key. After the prefabricated recycled concrete floor slab (15) is assembled, high-strength grouting material is poured at the reserved holes for the floor slab shear studs (7), and the completion is completed. The connection between the H-shaped steel beam (3) and the prefabricated recycled concrete floor slab (15). 7.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:π形连接件(4)通过外侧角焊缝及内侧角焊缝与轻型方钢管再生混凝土柱(1)通过贴焊连接,焊缝质量控制等级应为一级或二级。7. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node according to claim 1, is characterized in that: the π-shaped connector (4) passes through the outer fillet weld And the inner fillet weld and the light-weight square steel tube recycled concrete column (1) are connected by stick welding, and the quality control level of the weld shall be Class I or Class II. 8.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述矩形底板(10)为中心开孔的矩形钢板;8. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node according to claim 1, characterized in that: the rectangular bottom plate (10) is a center opening rectangular steel plate; 所述钢支撑(11)为热轧H型钢,以60°~45°角布置在两个相邻轻型方钢管再生混凝土柱(1)之间;钢支撑(11)翼缘宽度与π形连接件上肢(8)相等。The steel support (11) is a hot-rolled H-section steel, and is arranged between two adjacent light-duty square steel tube recycled concrete columns (1) at an angle of 60° to 45°; the flange width of the steel support (11) is connected with a pi shape The upper limbs (8) are equal. 9.根据权利要求1所述的一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点,其特征在于:所述工字形板凳拉结钢筋(13)为一种预制成型三维钢筋笼;工字形板凳拉结钢筋(13)由横向拉结弓形钢筋网与纵向拉结筋两部分组成;横向拉结弓形钢筋网由两侧两根带锚固端的弓形钢筋以及中间横向连接钢筋构成;9. A kind of CFST column-H-shaped steel beam-steel support-π-shaped connecting piece combined type middle column bottom node according to claim 1, it is characterized in that: described I-shaped bench tie bar (13) is A prefabricated three-dimensional reinforcement cage; an I-shaped bench-tie steel bar (13) is composed of two parts: a horizontally-tie bow-shaped steel bar mesh and a longitudinally-tie-tie bar; The middle transverse connecting steel bar is composed; 灌浆料托板(14)为三边焊接有预埋锚固钢筋弯钩的薄钢板。The grouting material support plate (14) is a thin steel plate welded with pre-embedded anchoring steel bar hooks on three sides. 10.一种钢管混凝土柱-H型钢梁-钢支撑-π形连接件组合式中柱底部节点作法,其特征在于:该方法的具体做法如下:10. A concrete-filled steel tubular column-H-shaped steel beam-steel support-π-shaped connector combined type middle column bottom node method is characterized in that: the concrete practice of the method is as follows: 第一步:工厂预制轻型方钢管再生混凝土柱(1)、柱板拉结筋(2),选择相应尺寸方钢管以及钢板,切割、打磨、开孔后在底部焊接基础连接板,随后在内部浇筑再生混凝土,经过养护完成方钢管再生混凝土柱(1)的制作;将制作完成的柱板拉结筋(2)焊接至轻型方钢管再生混凝土柱(1)两侧相应位置;Step 1: Factory prefabricated light-weight square steel tube recycled concrete column (1), column-plate tie bars (2), select the corresponding size square steel tube and steel plate, cut, grind, and open the bottom to weld the basic connecting plate at the bottom, and then internally The recycled concrete is poured, and the production of the square steel tube recycled concrete column (1) is completed after curing; the fabricated column-slab tie bars (2) are welded to the corresponding positions on both sides of the light-duty square steel tube recycled concrete column (1); 第二步:在工厂车间加工π形连接件(4)以及腹板连接板(5),先选择相应尺寸的成品热轧工字钢梁,进行切割、打磨、打孔制作成π形连接件上肢(8)、π形连接件下肢(9),将相应厚度热轧钢板切割、开孔,制作成矩形底板(10);将π形连接件上肢(8)、π形连接件下肢(9)与矩形底板(10)进行焊接,制作成π形连接件(4);选择相应尺寸与强度的钢板进行切割、开孔后制作成腹板连接板(5);Step 2: Process the π-shaped connector (4) and the web connection plate (5) in the factory workshop, first select the finished hot-rolled I-beam of the corresponding size, and cut, grind and punch to make the π-shaped connector. For the upper limb (8) and the lower limb (9) of the π-shaped connecting piece, a rectangular bottom plate (10) is made by cutting and drilling a hot-rolled steel plate of a corresponding thickness; the upper limb (8) and the lower limb (9) of the π-shaped connecting piece are ) is welded with the rectangular bottom plate (10) to make a π-shaped connecting piece (4); a steel plate of corresponding size and strength is selected to be cut and drilled to form a web connecting plate (5); 第三步:在工厂车间将π形连接件(4)以及腹板连接板(5)焊接至轻型方钢管再生混凝土柱(1)的两侧相应位置;首先将π形连接件(4)焊接至轻型方钢管再生混凝土柱(1)上,π形连接件(4)通过外侧角焊缝及内侧角焊缝与轻型方钢管再生混凝土柱(1)侧面贴焊连接,因此π形连接件(4)通过两圈矩形满焊角焊缝与方钢管柱连接这样充分保证了焊缝长度,充分满足节点处焊缝的抗剪承载力与抗弯承载力;然后将腹板连接板(5)通过矩形底板(10)中心孔洞焊接至方钢管柱上;将螺母焊接至π形连接件上肢(8)、π形连接件下肢(9)螺栓孔位置以备安装螺栓;Step 3: Weld the π-shaped connector (4) and the web connecting plate (5) to the corresponding positions on both sides of the light-duty square steel tube recycled concrete column (1) in the factory workshop; firstly, weld the π-shaped connector (4) To the light-duty square steel tube recycled concrete column (1), the π-shaped connector (4) is connected to the side of the light-duty square steel tube recycled concrete column (1) by welding through the outer and inner fillet welds. Therefore, the π-shaped connector ( 4) The length of the weld is fully ensured by connecting two circles of rectangular full fillet welds to the square steel tube column, which fully meets the shear bearing capacity and flexural bearing capacity of the weld at the node; then the web is connected to the plate (5) Weld to the square steel pipe column through the central hole of the rectangular base plate (10); Weld the nuts to the bolt hole positions of the upper limb (8) of the π-shaped connector and the lower limb (9) of the π-shaped connector to prepare for installing the bolts; 第四步:设置一道加劲肋焊接在H型钢梁(3)上,加劲肋厚度不小于H型钢梁(3)腹板厚度;按照设计位置加工H型钢梁(3)上下翼缘与腹板螺栓孔;最后在H型钢梁(3)顶面焊接栓钉;Step 4: Set up a stiffener to weld on the H-shaped steel beam (3), and the thickness of the stiffening rib is not less than the thickness of the web of the H-shaped steel beam (3); process the upper and lower flanges of the H-shaped steel beam (3) according to the design position. Bolt holes in the web; finally weld the studs on the top surface of the H-beam (3); 第五步:工厂加工预制钢支撑(11),选择符合截面尺寸要求的热轧H型钢,打磨、切削成相应尺寸;选择钢板,经过切割、打磨、开孔工序,加工制作钢支撑底部节点板;将加工成型的钢支撑焊接到底部节点板上;预制钢支撑加工完成;Step 5: The factory processes the prefabricated steel support (11), selects the hot-rolled H-section steel that meets the cross-sectional size requirements, grinds and cuts it to the corresponding size; ;Weld the formed steel support to the bottom gusset plate; the prefabricated steel support is finished; 第六步:制作灌浆料托板(14)和预制再生混凝土楼板(15),工厂选择成品钢板切割成相应尺寸,通过切割、弯折等工序加工灌浆料托板(14)上的锚固用钢筋弯钩,将钢筋弯钩点焊到钢板上加工完成灌浆料托板;制作、绑扎楼板钢筋,支楼板模板,将灌浆料托板放置在开洞处,浇筑楼板再生混凝土,养护成型;Step 6: Make the grouting material pallet (14) and the prefabricated recycled concrete floor slab (15), the factory selects the finished steel plate and cuts it into corresponding sizes, and processes the steel bars for anchoring on the grouting material pallet (14) by cutting, bending and other processes Bending hook, spot welding the steel bar hook to the steel plate to complete the grouting material support plate; make and bind the floor steel reinforcement, support the floor plate formwork, place the grouting material support plate in the opening, pour the floor slab recycled concrete, and maintain the molding; 第七步:在施工现场安装带有π形连接件(4)及腹板连接板(5)的轻型方钢管再生混凝土柱(1),将钢管混凝土柱通过基础连接板安装至基础上;在H型钢梁(6)端部上下切割三角形缺口,将H型钢梁(3)滑入两侧方钢管柱π形连接件(4)之间,使π形连接件(4)及腹板连接板(5)上的螺栓孔与H型钢梁(3)螺栓孔对正,用高强螺栓拧紧固定;Step 7: Install the light-duty square steel tube recycled concrete column (1) with the π-shaped connector (4) and the web connecting plate (5) on the construction site, and install the steel tube concrete column to the foundation through the foundation connecting plate; Triangular notches are cut up and down at the end of the H-shaped steel beam (6), and the H-shaped steel beam (3) is slid between the π-shaped connecting pieces (4) of the steel pipe columns on both sides, so that the π-shaped connecting pieces (4) and the web The bolt holes on the connecting plate (5) are aligned with the bolt holes of the H-shaped steel beam (3), and are fastened with high-strength bolts; 第八步:将预制再生混凝土楼板安装到相应位置;Step 8: Install the prefabricated recycled concrete floor slab to the corresponding position; 第九步:将预制钢支撑(11)通过高强螺栓安装到相应位置上;Step 9: Install the prefabricated steel support (11) to the corresponding position through high-strength bolts; 第十步:将工字形板凳拉结钢筋(13)放置到相应位置,拧紧70mm贯通高强螺栓(13)将工字形板凳拉结钢筋(13)固定在π形连接件上肢(8)腹板位置;并将工字形板凳拉结钢筋(13)两端横向弓形拉结筋绑扎到楼板钢筋(16)上;将纵向拉结筋与柱板拉结筋(2)以及楼板钢筋(16)进行绑扎;Step 10: Place the I-shaped bench tie bars (13) at the corresponding positions, and tighten the 70mm through high-strength bolts (13) to fix the I-shaped bench tie bars (13) at the web position of the upper limb (8) of the π-shaped connector ; Bind the transverse bow-shaped tie bars at both ends of the I-shaped bench tie bars (13) to the floor steel bars (16); ; 第十一步:在楼板抗剪栓钉(7)、π形连接件上肢(8)、工字形板凳拉结钢筋(13)以及灌浆料托板(14)等位置浇筑高强灌浆料,待养护完成进行后续施工。The eleventh step: pour high-strength grouting material on the floor shear studs (7), the upper limbs of the π-shaped connectors (8), the I-shaped bench tie bars (13), and the grouting material pallets (14), etc. Completion of subsequent construction.
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