CN106869314A - Compound steel pipe concrete column-steel beam assembled frame joint - Google Patents
Compound steel pipe concrete column-steel beam assembled frame joint Download PDFInfo
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- CN106869314A CN106869314A CN201611263015.2A CN201611263015A CN106869314A CN 106869314 A CN106869314 A CN 106869314A CN 201611263015 A CN201611263015 A CN 201611263015A CN 106869314 A CN106869314 A CN 106869314A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 167
- 239000010959 steel Substances 0.000 title claims abstract description 167
- 239000004567 concrete Substances 0.000 title claims abstract description 66
- 150000001875 compounds Chemical class 0.000 title claims description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000011372 high-strength concrete Substances 0.000 claims description 2
- 239000011376 self-consolidating concrete Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims 3
- 238000004080 punching Methods 0.000 claims 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 37
- 238000010276 construction Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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Abstract
本发明复式钢管混凝土柱‑钢梁装配式框架节点,涉及一种复式钢管混凝土柱与钢梁的框架节点连接形式,属于建筑工程领域。由复式钢管混凝土柱、钢梁及传力构件组成。复式钢管混凝土柱由外钢管、内钢管和混凝土组成;钢梁由上下翼缘和腹板组成;传力构件包括开孔带肋连接件、高强抗剪螺栓、高强长螺栓(或单边紧固螺栓)和钢固定约束件。在节点连接处,外钢管和内钢管开孔、预埋高强长螺栓(或单边紧固螺栓),然后浇筑混凝土;钢梁端部上下翼缘开孔,与开孔带肋连接件通过高强抗剪螺栓连接;同时,开孔带肋连接件与高强长螺栓(或单边紧固螺栓)、钢固定约束件进行组装。本发明复式钢管混凝土柱‑钢梁装配式框架节点加工安装方便,组件可在工厂预制运输到现场进行组装,现场施工完全无焊接,可适应工业化生产的需求。
The composite steel tube concrete column-steel beam assembled frame node of the present invention relates to a frame node connection form of a composite steel tube concrete column and a steel beam, and belongs to the field of construction engineering. It is composed of a composite steel tube concrete column, a steel beam and a force transmission component. The composite steel tube concrete column is composed of an outer steel tube, an inner steel tube and concrete; the steel beam is composed of upper and lower flanges and a web; the force transmission component includes an open hole ribbed connector, a high-strength shear bolt, a high-strength long bolt (or a single-sided fastening bolt) and a steel fixed constraint. At the node connection, the outer steel tube and the inner steel tube are opened, high-strength long bolts (or single-sided fastening bolts) are pre-embedded, and then concrete is poured; the upper and lower flanges of the steel beam end are opened, and the open hole ribbed connector is connected by a high-strength shear bolt; at the same time, the open hole ribbed connector is assembled with a high-strength long bolt (or a single-sided fastening bolt) and a steel fixed constraint. The composite steel tube concrete column-steel beam assembled frame node of the present invention is easy to process and install, and the components can be prefabricated in the factory and transported to the site for assembly. There is no welding in the on-site construction, which can meet the needs of industrialized production.
Description
技术领域technical field
本发明属于建筑结构程技工术领域,特别涉及一种复式钢管混凝土柱-钢梁装配式框架节点设计。The invention belongs to the technical field of building structure engineering, and in particular relates to a composite steel pipe concrete column-steel beam assembled frame node design.
背景技术Background technique
复式钢管混凝土柱是在普通钢管混凝土柱中增加内钢管形成的一种新型组合柱。现有的研究成果表明复式钢管混凝土柱一般具有如下优点:①由于外钢管与内钢管均能为核心混凝土提供约束作用,与普通钢管混凝土柱相比,复式钢管混凝土柱的抗压、抗剪、抗弯承载力大为提高;②可避免厚壁钢管的使用,减少钢管制作和加工上的困难;③当发生火灾时,内钢管被混凝土包裹,外层钢管屈服后,内层钢管基本不会屈服,可继续约束内部核心混凝土承担荷载,为人员逃生争取宝贵时间。因此,复式钢管混凝土柱可作为高层、超高层装配式框架结构及其混合结构中的重载柱。然而,现有的复式钢管混凝土-钢梁框架节点形式主要有:竖向肋板节点、外(肋)环板节点、钢梁(牛腿)穿心(半穿心)加腋节点。这几种节点虽可实现“强节点,弱构件”的抗震设防理念,但由于节点域焊接量大焊缝质量不易保证,实际工程应用中易造成焊缝的断裂破坏,不利于板件充分发挥材料强度。The composite steel tube concrete column is a new type of composite column formed by adding inner steel tubes to the ordinary steel tube concrete column. Existing research results show that composite CFST columns generally have the following advantages: ①Because both the outer steel pipe and the inner steel pipe can provide constraints for the core concrete, compared with ordinary CFST columns, the composite CFST columns have better compression resistance, shear resistance, The flexural bearing capacity is greatly improved; ②The use of thick-walled steel pipes can be avoided, and the difficulties in the manufacture and processing of steel pipes can be reduced; ③In the event of a fire, the inner steel pipe is wrapped by concrete, and after the outer steel pipe yields, the inner steel pipe basically does not If it yields, it can continue to constrain the internal core concrete to bear the load, buying precious time for personnel to escape. Therefore, the composite CFST columns can be used as heavy-duty columns in prefabricated frame structures of high-rise and super high-rise structures and their hybrid structures. However, the existing compound CFST-steel girder frame joint forms mainly include: vertical rib plate joints, outer (rib) ring plate joints, and steel beam (corbel) through-core (half-through-heart) plus axillary joints. Although these kinds of joints can realize the anti-seismic fortification concept of "strong joints, weak members", but due to the large amount of welding in the joint area, it is difficult to guarantee the quality of the weld seam, and it is easy to cause fracture damage of the weld seam in actual engineering applications, which is not conducive to the full play of the plate. Material strength.
发明内容Contents of the invention
本发明基于建筑结构生产工业化、制作装配化的发展趋势,提出一种复式钢管混凝土柱-钢梁装配式框架节点,并阐述了该节点的连接构造形式和制作方法。本发明施工简便、无现场焊接、工业化程度高并能可靠地传递梁柱之间的弯矩和剪力,梁端塑性铰的位置及节点的刚性程度可以通过调整开孔带肋连接件与钢梁翼缘的连接长度及传力构件中螺栓的数量来实现,可以满足不同设计条件下的抗震需求。Based on the development trend of building structure production industrialization and manufacturing assembly, the invention proposes a composite steel pipe concrete column-steel beam assembly frame node, and describes the connection structure form and manufacturing method of the node. The invention has the advantages of simple construction, no on-site welding, high degree of industrialization, and can reliably transmit the bending moment and shear force between beams and columns. The position of the plastic hinge at the beam end and the rigidity of the node can be adjusted by adjusting the opening ribbed connector and the steel beam flange. The connection length and the number of bolts in the force transmission member can be realized, which can meet the seismic requirements under different design conditions.
本发明复式钢管混凝土柱-钢梁装配式框架节点,由复式钢管混凝土柱、钢梁及传力构件组成。所述的复式钢管混凝土柱包括外钢管1、内钢管2及混凝土3,所述的钢梁4包括上下翼缘和腹板,所述的传力构件包括开孔带肋连接件5、高强抗剪螺栓6、高强长螺栓(或单边紧固螺栓)7、钢固定约束件8;其特征为:在节点连接处,外钢管1和内钢管2开孔、预埋高强长螺栓(或单边紧固螺栓)7,然后浇筑混凝土3;在钢梁4端部一定长度范围内上下翼缘处开孔,通过高强抗剪螺栓6与开孔带肋连接件5连接;同时,开孔带肋连接件5与高强长螺栓(或单边紧固螺栓)7、钢固定约束件8进行组装,形成所述的复式钢管混凝土柱-钢梁装配式框架节点。The composite steel pipe concrete column-steel beam assembled frame node of the present invention is composed of a composite steel pipe concrete column, a steel beam and a force transmission member. The composite steel pipe concrete column includes an outer steel pipe 1, an inner steel pipe 2 and concrete 3, the steel beam 4 includes upper and lower flanges and webs, and the force transmission member includes a perforated ribbed connector 5, a high-strength anti-corrosion Shear bolts 6, high-strength long bolts (or unilateral fastening bolts) 7, and steel fixing restraints 8; the characteristics are: at the node connection, the outer steel pipe 1 and the inner steel pipe 2 are opened, and the high-strength long bolts (or single-sided fastening bolts) are pre-embedded. side fastening bolts) 7, and then pouring concrete 3; holes are opened at the upper and lower flanges within a certain length range at the end of the steel beam 4, and are connected with the opening ribbed connector 5 through high-strength shear bolts 6; at the same time, the opening belt Rib connectors 5 are assembled with high-strength long bolts (or unilateral fastening bolts) 7 and steel fixing constraints 8 to form the composite steel pipe concrete column-steel beam assembly frame node.
所述的复式钢管混凝土柱类型为复式空心钢管混凝土柱或实复式钢管混凝土柱,内钢管和外钢管的截面组合形式为:内圆外圆、内方外方 、内圆外方、内方外圆或内矩形外矩形、内矩形外方形、内矩形外圆形。所述的混凝土为普通混凝土或高强混凝土或自密实混凝土。所述的内钢管与外钢管采用碳素钢或不锈钢或合金钢制成的薄壁钢管。所述的开孔带肋连接件由竖向板、水平板和竖肋组成,竖向截面形式为“ ”型,其中竖向板和水平板均预设孔洞,竖向板通过高强长螺栓(或单边紧固螺栓)与复式钢管混凝土柱连接,上下水平板净距为钢梁高以便与钢梁上下翼缘通过高强抗剪螺栓连接;竖向板和水平板之间设竖肋,可为单肋或多肋,当为单肋时,居中布置,当为多肋时,等间距布置且避开高强长螺栓(或单边紧固螺栓)位置;开孔带肋连接件的最小厚度不宜小于钢梁翼缘厚度与外钢管壁厚的最大值。当外钢管为矩形或正方形时,所述的开孔带肋连接件竖向板采用平板形式;当外钢管为圆形时,所述的开孔带肋连接件竖向板采用弧板形式,其曲率与圆钢管曲率相同。所述的高强长螺栓或单边紧固螺栓可根据需要进行选择:当复式钢管混凝土柱外钢管截面尺寸较大时,建议选择单边紧固螺栓实现单边半穿心装配式连接;当复式钢管混凝土柱外钢管截面尺寸较小时,可采用高强长螺栓实现双边穿心装配式连接,且当有两个方向的钢梁与复式钢管混凝土柱装配连接时,应错开两个方向的高强长螺栓位置。当外钢管为矩形或正方形时,所述的钢固定约束件为L形角钢;当外钢管为圆形时,所述的钢固定约束件采用弧形钢板,其曲率与圆钢管曲率相同。The type of the composite steel pipe concrete column is a composite hollow steel pipe concrete column or a solid composite steel pipe concrete column, and the cross-section combination form of the inner steel pipe and the outer steel pipe is: inner circle outer circle, inner square outer square, inner circle outer square, inner square outer Circle or Inner Rectangle Outer Rectangle, Inner Rectangle Outer Square, Inner Rectangle Outer Circle. The concrete is ordinary concrete or high-strength concrete or self-compacting concrete. The inner steel pipe and the outer steel pipe are thin-walled steel pipes made of carbon steel, stainless steel or alloy steel. The open ribbed connector is composed of a vertical plate, a horizontal plate and a vertical rib, and the vertical section is in the form of " "type, in which the vertical and horizontal slabs are pre-set with holes, the vertical slab is connected to the composite steel pipe concrete column through high-strength long bolts (or unilateral fastening bolts), and the net distance between the upper and lower horizontal slabs is the height of the steel beam so as to be connected with the steel beam. The upper and lower flanges are connected by high-strength shear bolts; vertical ribs are set between the vertical plate and the horizontal plate, which can be single rib or multi-rib. Open the position of high-strength long bolts (or single-sided fastening bolts); the minimum thickness of the ribbed connector with openings should not be less than the maximum value of the thickness of the steel beam flange and the wall thickness of the outer steel pipe. When the outer steel pipe is rectangular or square, the opening The vertical plate of the ribbed connector with holes is in the form of a flat plate; when the outer steel pipe is circular, the vertical plate of the ribbed connector with holes is in the form of an arc plate, and its curvature is the same as that of the round steel pipe. The high strength and long Bolts or unilateral fastening bolts can be selected according to needs: when the cross-sectional size of the outer steel pipe of the composite CFST column is large, it is recommended to select the unilateral fastening bolt to realize the unilateral half-through assembly connection; When the cross-sectional size is small, high-strength long bolts can be used to realize the double-sided assembly-type connection, and when there are steel beams in two directions and the composite steel pipe concrete column is assembled and connected, the positions of the high-strength long bolts in the two directions should be staggered. When the outer steel pipe When it is rectangular or square, the steel fixing constraint is an L-shaped angle steel; when the outer steel pipe is circular, the steel fixing constraint is an arc-shaped steel plate whose curvature is the same as that of a round steel tube.
有益效果:Beneficial effect:
本发明复式钢管混凝土柱-钢梁装配式框架节点,采用开孔带肋连接件、高强抗剪螺栓、高强长螺栓(或单边紧固螺栓)以及钢固定约束件实现了钢梁与复式钢管混凝土柱的装配式连接,具有如下有益效果:The composite steel pipe concrete column-steel beam assembly frame node of the present invention realizes the steel beam and the composite steel pipe by using open-hole ribbed connectors, high-strength shear bolts, high-strength long bolts (or unilateral fastening bolts) and steel fixing restraints The prefabricated connection of concrete columns has the following beneficial effects:
①所采用的开孔带肋连接件克服了现有端板式连接件需要与钢梁端部焊接以及T形连接件平面外刚度较小的缺点,并采用钢固定约束件将开孔带肋连接件固定约束到复式钢管混凝土柱上,可进一步延缓了开孔带肋连接件的平面外屈曲,有助于节点区域各板件发挥自身材料强度,节点整体性增强。②在装配高强长螺栓(或单边紧固螺栓)过程中能最大限度地保证钢管的完整性且避免在钢管内部进行复杂的操作以及焊接带来的施工弊端。开孔带肋连接件可在工厂预制运输到现场进行组装,加工安装方便,现场施工完全无焊接,从而适应工业化生产的需求。③梁端塑性铰的位置及节点的刚性程度可以通过调整开孔带肋连接件与钢梁翼缘连接长度及传力构件中螺栓的数量来实现,可以满足不同设计条件下的抗震需求。④节点域传力路线简单明确。梁端荷载依次通过高强抗剪螺栓、开孔肋连接件、钢固定约束件以及高强长螺栓(或单边紧固螺栓)传递到柱身。总之,本发明复式钢管混凝土柱与钢梁的框架节点设计简单、工业化程度高且具有良好的抗震性能和施工简便等优势,可广泛地应用到高层、超高层框架结构及其混合结构中 。①The ribbed connectors with openings overcome the shortcomings of the existing end-plate connectors that need to be welded to the end of the steel beam and the T-shaped connectors have low out-of-plane rigidity, and use steel fixing restraints to connect the ribs with openings Fixing and constraining the components to the composite steel tube concrete column can further delay the out-of-plane buckling of the open-hole ribbed connectors, help each plate in the node area to exert its own material strength, and enhance the integrity of the node. ②In the process of assembling high-strength long bolts (or single-sided fastening bolts), the integrity of the steel pipe can be guaranteed to the greatest extent and the construction disadvantages caused by complicated operations and welding inside the steel pipe can be avoided. The open-hole ribbed connector can be prefabricated in the factory and transported to the site for assembly. It is easy to process and install, and there is no welding at all in the site construction, so as to meet the needs of industrial production. ③ The position of the plastic hinge at the beam end and the rigidity of the joint can be realized by adjusting the connection length between the open-hole ribbed connector and the steel beam flange and the number of bolts in the force-transmitting member, which can meet the seismic requirements under different design conditions. ④ The force transmission route in the node domain is simple and clear. The load at the beam end is transmitted to the column body through high-strength shear bolts, open-hole rib connectors, steel fixing restraints, and high-strength long bolts (or single-side fastening bolts) in sequence. In a word, the frame joints of composite steel pipe concrete columns and steel beams of the present invention are simple in design, highly industrialized, have good seismic performance and simple construction, and can be widely applied to high-rise, super high-rise frame structures and their hybrid structures.
构造及具体实施方式Structure and specific implementation
下面以内圆外圆实复式钢管混凝土柱以及内圆外方实复式钢管混凝土柱为例参照附图对发明构造及制作步骤进行详细说明。The structure and manufacturing steps of the invention will be described in detail below by taking the inner circle and outer circle solid composite steel pipe concrete column and the inner circle and outer square solid composite steel pipe concrete column as examples with reference to the accompanying drawings.
图1a、1b分别为上述两种实复式钢管混凝土柱截面形式图;Figures 1a and 1b are the cross-sectional diagrams of the above two solid composite steel pipe concrete columns respectively;
图2a、2b分别为图1中两种实复式钢管混凝土柱-钢梁的装配式框架节点平剖面示意图;Figures 2a and 2b are schematic cross-sectional views of the assembled frame joints of the two solid composite CFST columns-steel beams in Figure 1, respectively;
图3a、3b分别为图2a、2b中A-A剖面及B-B剖面示意图。Figures 3a and 3b are schematic views of A-A section and B-B section in Figures 2a and 2b respectively.
本发明复式钢管混凝土柱-钢梁装配式框架节点由复式钢管混凝土柱、钢梁及传力构件组成。复式钢管混凝土柱包括外钢管1、内钢管2及混凝土3,如图1所示;钢梁4包括上下翼缘和腹板;传力构件包括开孔带肋连接件5、高强抗剪螺栓6、高强长螺栓(或单边紧固螺栓)7、钢固定约束件8。如图2、图3所示,具体实施如下:步骤一:首先根据设计要求,在节点连接处,外钢管1和内钢管2开设一定数量孔洞,预埋一定数量高强长螺栓(或单边紧固螺栓),并完成柱内混凝土浇筑。步骤二:钢梁4端部一定长度范围内上下翼缘处开设一定数量孔洞,通过高强抗剪螺栓6与预制的开孔带肋连接件5连接。步骤三:将开孔带肋连接件5与高强长螺栓(或单边紧固螺栓)7、钢固定约束件8进行组装,最后采用扭矩扳手将高强抗剪螺栓6和高强长螺栓(或单边紧固螺栓)7进行机械拧紧,最终完成复式钢管混凝土柱与钢梁的装配式框架节点。The composite steel pipe concrete column-steel beam assembled frame node of the present invention is composed of a composite steel pipe concrete column, a steel beam and a force transmission member. The composite steel pipe concrete column includes outer steel pipe 1, inner steel pipe 2 and concrete 3, as shown in Figure 1; steel beam 4 includes upper and lower flanges and webs; force transmission components include opening ribbed connectors 5, high-strength shear bolts 6 , High-strength long bolts (or unilateral fastening bolts) 7, steel fixed restraints 8. As shown in Figure 2 and Figure 3, the specific implementation is as follows: Step 1: First, according to the design requirements, a certain number of holes are opened in the outer steel pipe 1 and the inner steel pipe 2 at the node connection, and a certain number of high-strength long bolts (or unilaterally tightened bolts) are pre-buried. bolts), and complete the concrete pouring in the column. Step 2: A certain number of holes are opened at the upper and lower flanges within a certain length range at the end of the steel beam 4, and are connected with the prefabricated open-hole ribbed connector 5 through high-strength shear bolts 6 . Step 3: Assemble the opening ribbed connector 5 with high-strength long bolts (or unilateral fastening bolts) 7 and steel fixing constraints 8, and finally use a torque wrench to fasten the high-strength shear bolts 6 and high-strength long bolts (or single-sided fastening bolts) Side fastening bolts) 7 are mechanically tightened to finally complete the assembled frame joints of the composite steel pipe concrete columns and steel beams.
本发明复式钢管混凝土柱-钢梁装配式框架节点,所涉及的开孔带肋连接件由竖向板、水平板和竖肋组成,竖向截面形式为“ ”型,开孔带肋连接件可在工厂预制运输到现场进行组装。竖向板和水平板均预设孔洞,其中竖向板通过高强长螺栓(或单边紧固螺栓)与复式钢管混凝土柱连接,上下水平板净距为钢梁高以便与钢梁上下翼缘通过高强抗剪螺栓连接;竖向板和水平板之间设竖肋,可为单肋或多肋,当为单肋时,居中布置,当为多肋时,等间距布置且避开高强长螺栓(或单边紧固螺栓)位置。开孔带肋连接件的最小厚度不宜小于钢梁翼缘厚度与外钢管壁厚的最大值。当外钢管为矩形或正方形时,所述的开孔带肋连接件竖向板采用平板形式;当外钢管为圆形时,所述的开孔带肋连接件竖向板采用弧板形式,其曲率与圆钢管曲率相同。所涉及的传力构件高强长螺栓或单边紧固螺栓可根据需要选取一种形式,当复式钢管混凝土柱外钢管截面尺寸较大时,建议选择单边紧固螺栓实现单边半穿心装配式连接;当复式钢管混凝土柱外钢管截面尺寸较小时,可采用高强长螺栓实现双边穿心装配式连接,且当有两个方向的钢梁与复式钢管混凝土柱装配时,应错开两个方向的高强长螺栓位置。所涉及的钢固定约束件当复式钢管混凝土的外钢管为矩形或正方形时为L形角钢;当外钢管为圆形时采用弧形钢板,其曲率与圆钢管曲率相同。The composite steel pipe concrete column-steel beam assembly frame joint of the present invention involves open-hole ribbed connectors consisting of vertical plates, horizontal plates and vertical ribs, and the vertical section form is " "type, ribbed connectors with openings can be prefabricated in the factory and transported to the site for assembly. Both the vertical plate and the horizontal plate have preset holes, and the vertical plate is connected with the composite steel pipe concrete by high-strength long bolts (or unilateral fastening bolts) Column connection, the net distance between the upper and lower horizontal plates is the height of the steel beam so as to be connected with the upper and lower flanges of the steel beam through high-strength shear bolts; vertical ribs are set between the vertical plate and the horizontal plate, which can be single rib or multiple ribs, when it is a single rib When it is multi-rib, arrange it in the center. When it is multi-rib, arrange it at equal intervals and avoid the position of high-strength long bolts (or single-sided fastening bolts). The minimum thickness of the ribbed connector with openings should not be less than the thickness of the flange of the steel beam and the wall thickness of the outer steel pipe. Maximum value. When the outer steel pipe is a rectangle or a square, the vertical plate of the ribbed connector with holes adopts the form of a flat plate; plate form, the curvature of which is the same as that of round steel pipes. The high-strength long bolts or unilateral fastening bolts involved in the force-transmitting members can be selected according to the needs. Fasten the bolts at the side to realize the unilateral half-through assembly connection; when the section size of the outer steel pipe of the compound steel tube concrete column is small, high-strength long bolts can be used to realize the bilateral through-heart assembly connection, and when there are two When assembling concrete-filled steel tube columns, the positions of high-strength long bolts in two directions should be staggered. The steel fixing constraints involved are L-shaped angle steel when the outer steel tube of the composite steel tube concrete is rectangular or square; Shaped steel plate, the curvature of which is the same as that of a round steel pipe.
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