WO2018077202A1 - Joint connection for recycled block concrete composite beam-column and construction method therefor - Google Patents
Joint connection for recycled block concrete composite beam-column and construction method therefor Download PDFInfo
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- WO2018077202A1 WO2018077202A1 PCT/CN2017/107723 CN2017107723W WO2018077202A1 WO 2018077202 A1 WO2018077202 A1 WO 2018077202A1 CN 2017107723 W CN2017107723 W CN 2017107723W WO 2018077202 A1 WO2018077202 A1 WO 2018077202A1
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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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- the invention relates to the technical field of waste concrete recycling, in particular to a joint connection of a regenerated block concrete composite beam-column and a construction method thereof.
- waste concrete has attracted more and more attention at home and abroad.
- waste concrete blocks can greatly simplify the recycling process of waste concrete.
- U-shaped steel-concrete beams are a new type of composite member that has emerged in recent years. Compared with traditional reinforced concrete beams, the use of U-shaped steel can not only reduce the process of steel band lashing and demoulding, but also significantly improve construction efficiency. The degree of industrialization is high, and the construction of large-scale waste concrete blocks is greatly facilitated.
- Concrete-filled steel tubular columns have been widely used in engineering construction due to their superior mechanical properties and convenient construction methods.
- the waste concrete block and the new concrete are placed in the steel pipe, which becomes the steel pipe recycled concrete block, which can achieve the purpose of recycling the waste concrete while maintaining good mechanical properties.
- strong column weak beam is an effective means to improve the overall seismic performance of the frame structure, but in actual earthquakes, the structure often presents an unfavorable failure mode of "strong beam weak column".
- the longitudinal reinforcement of the beam crosses the core area of the node according to the traditional method, it will inevitably cause great difficulty for the construction of the large-scale waste concrete block in the pillar and the core area of the node. Therefore, there is an urgent need for beam-column joints that are convenient for the discharge of used concrete blocks and have good seismic performance.
- the object of the present invention is to provide a joint connection of a regenerated block concrete composite beam-column and a construction method thereof.
- the longitudinal ribs of the beam are avoided to cross the core area of the joint, thereby solving the problem of the large-scale waste concrete block being placed in the pillar and the core area of the joint, and the use of the U-shaped outer steel can reduce the lashing of the steel bar and the demoulding of the formwork.
- the process is convenient and conforms to the requirements of industrialization of the building; on the other hand, the bending capacity of the beam end is weakened in advance to ensure the favorable failure mode of the "strong column weak beam", thereby improving the overall seismic performance of the structure.
- Reinforced block concrete composite beam-column joint connection including square steel tube regenerated block concrete column, U-shaped outer steel regenerated block concrete beam, bottom plate partially weakened and single-ended widened U-shaped steel connecting piece, belt a grooved steel connecting plate and a single-end threaded short reinforcing bar; a U-shaped steel connecting piece and a grooved steel connecting plate partially weakened and single-ended widened on the outer wall of the square steel pipe in the core portion of the joint;
- One end of the threaded short steel bar is welded in the groove of the grooved steel connecting plate, and the other end is connected with the upper longitudinal rib of the U-shaped steel-recycled steel concrete beam through the steel sleeve;
- the diameter of the short reinforced bar of the thread is smaller than the diameter of the upper longitudinal rib of the concrete beam of the U-shaped outer steel regenerated block; the U-shaped steel connecting piece with the partially weakened and single-end widened and the U-shaped outer steel recycled concrete beam U-shaped outer
- the square steel tube regenerated block concrete column and the U-shaped outer steel recycled block concrete beam are filled with waste concrete block and new concrete, waste concrete block and square steel pipe, U-shaped outer steel, and bottom plate.
- the gap between the partially weakened and single-ended widened U-shaped steel joints and between the different waste concrete blocks is filled with new concrete, and the mass ratio of the waste concrete block to the new concrete is 1:4 ⁇ 1:1.
- the U-shaped steel connecting member with the bottom plate partially weakened and single-ended widened has a bottom plate weakened form in a circular arc shape.
- the single-end threaded short steel bar is connected to the steel sleeve of the upper longitudinal reinforcement of the U-shaped outer steel recycled concrete beam.
- the waste concrete block is a block in which old buildings, structures, roads are broken after removing all or part of the steel bars, and the characteristic size of the waste concrete blocks is not less than 60 mm.
- a construction method for a joint connection of a regenerated block concrete composite beam-column comprising the following steps:
- the present invention has the following advantages and effects:
- Fig. 1 is a structural schematic view of a node connection of a regenerated block concrete composite beam-column.
- Figure 2 is a vertical sectional view of the joint node shown in Figure 1.
- the figure shows: 1-square steel tube recycled block concrete column; 2-grooved steel connecting plate; 3-single-ended threaded short steel bar; 4-steel sleeve; 5-upper longitudinal rib; - U-shaped steel joints with partially weakened and single-ended widened bottom plates; 7-U-shaped outer steel reclaimed concrete beams; 8-high-strength bolts; 9-transverse strengthened steel sheets; 10-U-shaped outer steels; Square steel pipe; 12-waste concrete block; 13-new concrete.
- the joint connection of a regenerated block concrete composite beam-column includes a square steel tube regenerated block concrete column 1, a U-shaped outer steel regenerated block concrete beam 7, and the bottom plate is partially weakened and single. End widened U-shaped steel connecting piece 6, grooved steel connecting plate 2 and single-end threaded short reinforcing bar 3; in Fig. 1, in order to clearly show U-shaped outer steel recycled bulk concrete beam and square steel pipe regeneration block The detailed structure of the concrete column, the concrete of the beam and column is hidden.
- a U-shaped steel connecting member 6 and a grooved steel connecting plate 2 partially weakened and single-ended widened are welded on the outer wall of the square steel pipe 11 in the core region of the node; one end of the single-end threaded short reinforcing bar 3 is welded to the belt In the groove of the steel connecting plate 2 of the groove, the other end is connected with the upper longitudinal rib 5 of the U-shaped steel-recycled steel concrete beam 7 through the steel sleeve 4; the diameter of the single-end threaded short steel bar 3 Less than the diameter of the upper longitudinal rib 5 of the U-shaped outer steel reclaimed concrete beam 7; the U-shaped steel connecting piece 6 with a partially weakened and single-ended widened base and the U-shaped of the U-shaped outer steel recycled bulk concrete beam 7
- the outer steel 10 is bolted; the bottom of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened is provided with two transverse reinforcing steel plates 9; the width of the grooved
- the square steel pipe 11 of the square steel pipe regenerated block concrete column 1 is a welded steel pipe, and the square steel pipe 11 has a cross-sectional dimension of 450 mm ⁇ 450 mm and a wall thickness of 10 mm.
- the web height, the bottom plate width and the plate thickness of the U-shaped outer steel 10 are 400 mm, 200 mm and 10 mm, respectively, and the non-widened end of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened.
- the height of the plate, the width of the bottom plate and the thickness of the plate are 400 mm, 220 mm and 10 mm, respectively.
- the web height, the width of the bottom plate and the thickness of the plate at the widened end of the U-shaped steel connecting piece 6 which is partially weakened and single-ended widened are 400 mm, 450 mm and respectively. 10mm.
- the inside of the square steel pipe regenerated block concrete column 1 and the U-shaped outer steel reclaimed block concrete beam 7 are filled with the waste concrete block 12 and the new concrete 13, and the waste concrete block 12 is an old building.
- the gap between the waste concrete block 12 and the square steel tube 11, the U-shaped outer steel 10, the partially weakened and single-ended widened U-shaped steel joint 6 and the gap between the different waste concrete blocks 12 is filled with new concrete 13
- the mass ratio of the waste concrete block 12 to the new concrete 13 is 1:2.
- the web of the widened end of the U-shaped steel connecting member 6 which is partially weakened and partially single-ended widened is welded to the outer wall of the square steel pipe 11 of the core portion of the node through the fillet weld, and the bottom plate is partially weakened and single-ended widened.
- the bottom plate of the widened end of the U-shaped steel connecting member 6 is welded to the outer wall of the square steel pipe 11 of the node core region through the groove butt weld; the grooved steel connecting plate 2 is butt welded to the core portion of the node through the groove The outer wall of the steel pipe 11 is welded; the single-end threaded short steel bar 3 is welded to the grooved steel connecting plate 2 by a fillet weld.
- the U-shaped outer steel 10 and the bottom plate are partially weakened and the single-end widened U-shaped steel connecting member 6 has a non-widening end overlapping length of 100 mm, and is connected by a high-strength bolt 8, and the high-strength bolt 8 Use M20 bolts of class 10.9.
- the U-shaped steel connecting piece of the bottom plate partially weakened and single-ended widened is provided with two horizontal reinforcing steel plates 9 in parallel, and the U-shaped steel connecting piece with the lateral reinforcing steel plate 9 and the bottom plate partially weakened and single-ended widened.
- the inner wall of 6 is welded and fixed.
- the construction method of the node connection of the above-mentioned recycled concrete composite beam-column includes the following steps:
- U-shaped steel connecting piece 6 partially weakened and single-ended widened by high-strength bolt 8 is connected with U-shaped outer steel 10 of U-shaped outer steel reclaimed concrete beam 7; steel sleeve 4 is used The upper longitudinal rib 5 of the U-shaped outer steel-recycled concrete beam 7 is connected to the single-end threaded short steel bar 3;
- the waste concrete block 12 is sufficiently wetted in advance, and a new concrete 13 having a thickness of 25 mm-35 mm is first poured in the concrete column 1 of the square steel pipe regeneration block; the waste concrete block 12 and the new concrete 13 are alternately placed.
- the square steel tube regenerates the interior of the concrete column 1 and is fully vibrated;
- the square steel pipe 11, the U-shaped outer steel 10, the U-shaped steel connecting member 6 and the grooved steel connecting plate 2 which are partially weakened and single-ended widened are all made of Q345B steel, and the welding rod adopts E50 shape.
- Flux F4A0, weld quality grade is one level.
- the upper longitudinal rib 5 of the U-shaped outer steel recycled concrete beam 7 is made of HRB400 hot-rolled steel bar, the new concrete 13 has a strength grade of C35, and the waste concrete block 12 has a strength grade of C30.
- the present invention can be preferably carried out.
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Abstract
A joint connection for a recycled block concrete modular beam-column and a construction method therefor A joint comprises a square steel tube recycled block concrete column (1); a U-shaped steel-encased recycled block concrete beam (7); U-shaped steel connectors (6), which are partially reduced at bottoms thereof and which are widened on one end thereof; steel connecting plates (2) which are provided with grooves, and short steel bars (3) which are provided with threads on one end thereof. The U-shaped steel connectors (6) and the steel connecting plates (2) are welded onto an outer wall of a square steel tube (11) which is located in a core area of the joint. The short steel bars (3) are welded into the grooves of the steel connecting plates (2) on one end, while on the other end being connected, by means of a steel sleeve (4), to longitudinal bars (5) at a top part of the U-shaped steel-encased recycled block concrete beam (7). The joint prevents the longitudinal bars of the beam from traversing the core area, increasing the anti-seismic capability of the entire structure while expediting construction.
Description
技术领域Technical field
本发明涉及废旧混凝土循环利用技术领域，具体是一种再生块体混凝土组合梁 - 柱的节点连接及其施工方法。
The invention relates to the technical field of waste concrete recycling, in particular to a joint connection of a regenerated block concrete composite beam-column and a construction method thereof.
背景技术Background technique
目前天然砂、石的开采破坏环境且储量日渐减少，废旧混凝土作为一种宝贵的“特殊资源”，其循环利用已越来越引起国内外的广泛关注。与再生粗骨料和再生细骨料相比，采用尺度更大的废旧混凝土块体能大大简化废旧混凝土的循环利用过程。At present, the exploitation of natural sand and stone destroys the environment and the reserves are decreasing day by day. As a valuable “special resource”, waste concrete has attracted more and more attention at home and abroad. Compared with recycled coarse aggregates and recycled fine aggregates, the use of larger-scale waste concrete blocks can greatly simplify the recycling process of waste concrete.
U形外包钢混凝土梁是近年来兴起的一种新型组合构件，相比传统钢筋混凝土梁，U形外包钢的采用不仅可减少钢筋绑扎和支模拆模等工序，施工效率明显提升，工业化程度高，而且极大地方便了大尺度废旧混凝土块体的投放施工。U-shaped steel-concrete beams are a new type of composite member that has emerged in recent years. Compared with traditional reinforced concrete beams, the use of U-shaped steel can not only reduce the process of steel band lashing and demoulding, but also significantly improve construction efficiency. The degree of industrialization is high, and the construction of large-scale waste concrete blocks is greatly facilitated.
钢管混凝土柱以其优越的力学性能和便捷的施工方法，已广泛应用于工程建设中。在钢管中置入废旧混凝土块体和新混凝土，即成为钢管再生块体混凝土柱，可在维持良好力学性能的同时达到废旧混凝土循环利用的目的。Concrete-filled steel tubular columns have been widely used in engineering construction due to their superior mechanical properties and convenient construction methods. The waste concrete block and the new concrete are placed in the steel pipe, which becomes the steel pipe recycled concrete block, which can achieve the purpose of recycling the waste concrete while maintaining good mechanical properties.
众所周知，“强柱弱梁”是提高框架结构整体抗震性能的有效手段，但实际地震中结构却常常呈现“强梁弱柱”的不利破坏形态。此外，若梁的纵筋按传统做法穿越节点核心区，必然给大尺度废旧混凝土块体在柱子以及节点核心区的投放施工造成很大困难。因此，迫切需要既方便废旧混凝土块体投放，又具有良好抗震性能的梁-柱节点。
As we all know, "strong column weak beam" is an effective means to improve the overall seismic performance of the frame structure, but in actual earthquakes, the structure often presents an unfavorable failure mode of "strong beam weak column". In addition, if the longitudinal reinforcement of the beam crosses the core area of the node according to the traditional method, it will inevitably cause great difficulty for the construction of the large-scale waste concrete block in the pillar and the core area of the node. Therefore, there is an urgent need for beam-column joints that are convenient for the discharge of used concrete blocks and have good seismic performance.
发明内容Summary of the invention
本发明的目的在于提供一种再生块体混凝土组合梁-柱的节点连接及其施工方法。一方面避免了梁的纵筋穿越节点核心区，从而解决了大尺度废旧混凝土块体在柱子以及节点核心区的投放施工难题，同时U形外包钢的采用可减少钢筋绑扎和支模拆模等工序，施工便捷，符合建筑工业化的要求；另一方面通过预先削弱梁端的抗弯承载能力，以确保实现“强柱弱梁”的有利破坏模式，从而提高结构的整体抗震性能。The object of the present invention is to provide a joint connection of a regenerated block concrete composite beam-column and a construction method thereof. On the one hand, the longitudinal ribs of the beam are avoided to cross the core area of the joint, thereby solving the problem of the large-scale waste concrete block being placed in the pillar and the core area of the joint, and the use of the U-shaped outer steel can reduce the lashing of the steel bar and the demoulding of the formwork. The process is convenient and conforms to the requirements of industrialization of the building; on the other hand, the bending capacity of the beam end is weakened in advance to ensure the favorable failure mode of the "strong column weak beam", thereby improving the overall seismic performance of the structure.
本发明的目的通过下述技术方案实现。The object of the present invention is achieved by the following technical solutions.
一种再生块体混凝土组合梁-柱的节点连接，包括方钢管再生块体混凝土柱、U形外包钢再生块体混凝土梁、底板局部削弱且单端加宽的U形钢连接件、带凹槽的钢连接板和单端带螺纹的短钢筋棒；在节点核心区的方钢管外壁上焊接底板局部削弱且单端加宽的U形钢连接件和带凹槽的钢连接板；单端带螺纹的短钢筋棒的一端焊接在带凹槽的钢连接板的凹槽中，另一端与U形外包钢再生块体混凝土梁的上部纵筋通过钢套筒进行连接；单端带螺纹的短钢筋棒的直径小于U形外包钢再生块体混凝土梁的上部纵筋的直径；底板局部削弱且单端加宽的U形钢连接件与U形外包钢再生块体混凝土梁的U形外包钢之间采用焊接、螺栓连接或栓焊连接；底板局部削弱且单端加宽的U形钢连接件的内部设置有2~4块横向加强钢板；带凹槽的钢连接板的宽度与方钢管再生块体混凝土柱的横截面边长相等，底板局部削弱且单端加宽的U形钢连接件在加宽端的底板宽度与方钢管再生块体混凝土柱的横截面边长相等。Reinforced block concrete composite beam-column joint connection, including square steel tube regenerated block concrete column, U-shaped outer steel regenerated block concrete beam, bottom plate partially weakened and single-ended widened U-shaped steel connecting piece, belt a grooved steel connecting plate and a single-end threaded short reinforcing bar; a U-shaped steel connecting piece and a grooved steel connecting plate partially weakened and single-ended widened on the outer wall of the square steel pipe in the core portion of the joint; One end of the threaded short steel bar is welded in the groove of the grooved steel connecting plate, and the other end is connected with the upper longitudinal rib of the U-shaped steel-recycled steel concrete beam through the steel sleeve; The diameter of the short reinforced bar of the thread is smaller than the diameter of the upper longitudinal rib of the concrete beam of the U-shaped outer steel regenerated block; the U-shaped steel connecting piece with the partially weakened and single-end widened and the U-shaped outer steel recycled concrete beam U-shaped outer steel is welded, bolted or bolted; the bottom of the U-shaped steel joint with partially weakened and single-ended widened is provided with 2~4 transverse reinforcement steel plates; grooved steel connection The width of the plate and the square steel tube regenerated block concrete column The width of the bottom plate of the U-shaped steel connecting piece with the cross-sectional side length equal to the partial weakening and single-end widening at the widened end is equal to the cross-sectional side length of the square steel pipe regenerated block concrete column.
进一步地，所述方钢管再生块体混凝土柱和U形外包钢再生块体混凝土梁的内部填充有废旧混凝土块体和新混凝土，废旧混凝土块体与方钢管、U形外包钢、底板局部削弱且单端加宽的U形钢连接件之间以及不同废旧混凝土块体之间的空隙填满新混凝土，废旧混凝土块体与新混凝土的质量比为1:4~1:1。Further, the square steel tube regenerated block concrete column and the U-shaped outer steel recycled block concrete beam are filled with waste concrete block and new concrete, waste concrete block and square steel pipe, U-shaped outer steel, and bottom plate. The gap between the partially weakened and single-ended widened U-shaped steel joints and between the different waste concrete blocks is filled with new concrete, and the mass ratio of the waste concrete block to the new concrete is 1:4~1:1.
进一步地，所述底板局部削弱且单端加宽的U形钢连接件，其底板削弱的形式为圆弧形。Further, the U-shaped steel connecting member with the bottom plate partially weakened and single-ended widened has a bottom plate weakened form in a circular arc shape.
进一步地，所述单端带螺纹的短钢筋棒与U形外包钢再生块体混凝土梁的上部纵筋的钢套筒连接为螺纹连接。Further, the single-end threaded short steel bar is connected to the steel sleeve of the upper longitudinal reinforcement of the U-shaped outer steel recycled concrete beam.
进一步地，所述废旧混凝土块体为旧有建筑物、构筑物、道路去除全部或部分钢筋后破碎而成的块体，且废旧混凝土块体的特征尺寸不低于60mm。Further, the waste concrete block is a block in which old buildings, structures, roads are broken after removing all or part of the steel bars, and the characteristic size of the waste concrete blocks is not less than 60 mm.
一种如所述再生块体混凝土组合梁-柱的节点连接的施工方法，包括如下步骤：A construction method for a joint connection of a regenerated block concrete composite beam-column, comprising the following steps:
（1）将单端带螺纹的短钢筋棒焊接于带凹槽的钢连接板的凹槽中；定位底板局部削弱且单端加宽的U形钢连接件和焊有单端带螺纹的短钢筋棒的带凹槽的钢连接板，并将二者焊接在节点核心区的方钢管外壁上；(1) Welding a single-end threaded short steel bar into the groove of the grooved steel connecting plate; positioning the bottom plate partially weakened and single-ended widened U-shaped steel connecting piece and welded with single-ended threaded short a grooved steel connecting plate of the reinforcing bar and welding the two on the outer wall of the square steel pipe in the core area of the joint;
（2）将底板局部削弱且单端加宽的U形钢连接件与U形外包钢再生块体混凝土梁的U形外包钢进行焊接、螺栓连接或栓焊连接；采用钢套筒将U形外包钢再生块体混凝土梁的上部纵筋与单端带螺纹的短钢筋棒连接；(2) U-shaped steel joints with partial weakening and single-end widening of the bottom plate are welded, bolted or bolted with U-shaped outer steel of U-shaped steel-recycled concrete beams; steel sleeves are used The upper longitudinal reinforcement of the U-shaped outer steel recycled concrete beam is connected with the short-ended steel rod with single-end threaded;
（3）提前将废旧混凝土块体充分湿润，并在方钢管再生块体混凝土柱内先浇筑一层厚度25mm-35mm的新混凝土；将废旧混凝土块体和新混凝土交替置入方钢管再生块体混凝土柱的内部并充分振捣；(3) The waste concrete block is fully wetted in advance, and a new layer of concrete with a thickness of 25mm-35mm is firstly poured in the concrete column of the square steel pipe regeneration block; the waste concrete block and the new concrete are alternately placed into the square steel pipe regeneration block. The interior of the concrete column is fully vibrated;
（4）将废旧混凝土块体一次性投入U形外包钢和底板局部削弱且单端加宽的U形钢连接件的内部，然后灌入新混凝土并充分振捣。(4) Put the waste concrete block into the U-shaped outer steel and the inside of the U-shaped steel joint with the base weakened and single-ended widened at one time, then pour into the new concrete and fully vibrate.
本发明相对于现有技术，具有如下优点及效果：Compared with the prior art, the present invention has the following advantages and effects:
（1）节点核心区无穿心部件，解决了大尺度废旧混凝土块体在柱子以及节点核心区投放困难的问题；U形外包钢的采用可减少钢筋绑扎和支模拆模等工序，明显提高施工效率，同时极大地方便了大尺度废旧混凝土块体在梁内的投放。(1) There is no penetrating component in the core area of the node, which solves the problem that the large-scale waste concrete block is difficult to put in the pillar and the core area of the node; the use of U-shaped outer steel can reduce the process of reinforcing the steel bar and demoulding, obviously Improve the construction efficiency, and greatly facilitate the placement of large-scale waste concrete blocks in the beam.
（2）通过采用底板局部削弱且单端加宽的U形钢连接件，同时适当减小单端带螺纹的短钢筋棒的直径（即小于U形外包钢再生块体混凝土梁的上部纵筋的直径），使梁端率先屈服形成塑性铰，确保实现“强柱弱梁”的有利破坏模式，进而提高结构整体的抗震性能。(2) By using a U-shaped steel connecting piece whose base plate is partially weakened and single-ended widened, and at the same time appropriately reducing the diameter of the single-end threaded short steel bar (ie, smaller than the upper longitudinal direction of the U-shaped outer steel regenerated block concrete beam) The diameter of the ribs makes the beam end first yield to form a plastic hinge, ensuring a favorable failure mode of the "strong column weak beam", thereby improving the overall seismic performance of the structure.
（3）单端带螺纹的短钢筋棒与带凹槽的钢连接板之间的焊接，以及底板局部削弱且单端加宽的U形外包钢和带凹槽的钢连接板与节点核心区的方钢管之间的焊接均可在工厂进行，不仅焊接质量高，而且可明显减少施工现场的焊接工作量，符合建筑工业化要求。(3) Welding between single-ended threaded short steel bars and grooved steel connecting plates, and partially weakened and single-ended widened U-shaped outer steel and grooved steel connecting plates and node cores The welding between the square steel tubes in the area can be carried out in the factory, which not only has high welding quality, but also can significantly reduce the welding workload on the construction site and meet the requirements of industrialization of the building.
附图说明 DRAWINGS
图1是一种再生块体混凝土组合梁-柱的节点连接的结构示意图。Fig. 1 is a structural schematic view of a node connection of a regenerated block concrete composite beam-column.
图2是图1所示连接节点的竖向剖面图。Figure 2 is a vertical sectional view of the joint node shown in Figure 1.
图中所示为：1-方钢管再生块体混凝土柱；2-带凹槽的钢连接板；3-单端带螺纹的短钢筋棒；4-钢套筒；5-上部纵筋；6-底板局部削弱且单端加宽的U形钢连接件；7-U形外包钢再生块体混凝土梁；8-高强螺栓；9-横向加强钢板；10-U形外包钢；11-方钢管；12-废旧混凝土块体；13-新混凝土。The figure shows: 1-square steel tube recycled block concrete column; 2-grooved steel connecting plate; 3-single-ended threaded short steel bar; 4-steel sleeve; 5-upper longitudinal rib; - U-shaped steel joints with partially weakened and single-ended widened bottom plates; 7-U-shaped outer steel reclaimed concrete beams; 8-high-strength bolts; 9-transverse strengthened steel sheets; 10-U-shaped outer steels; Square steel pipe; 12-waste concrete block; 13-new concrete.
具体实施方式detailed description
面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施方式不限于此。The present invention will be described in further detail with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.
如图1、图2所示，一种再生块体混凝土组合梁-柱的节点连接，包括方钢管再生块体混凝土柱1、U形外包钢再生块体混凝土梁7、底板局部削弱且单端加宽的U形钢连接件6、带凹槽的钢连接板2和单端带螺纹的短钢筋棒3；图1中，为了清晰展示U形外包钢再生块体混凝土梁和方钢管再生块体混凝土柱的细部构造，梁和柱的混凝土被隐去。在节点核心区的方钢管11外壁上焊接底板局部削弱且单端加宽的U形钢连接件6和带凹槽的钢连接板2；单端带螺纹的短钢筋棒3的一端焊接在带凹槽的钢连接板2的凹槽中，另一端与U形外包钢再生块体混凝土梁7的上部纵筋5通过钢套筒4进行连接；单端带螺纹的短钢筋棒3的直径小于U形外包钢再生块体混凝土梁7的上部纵筋5的直径；底板局部削弱且单端加宽的U形钢连接件6与U形外包钢再生块体混凝土梁7的U形外包钢10之间采用螺栓连接；底板局部削弱且单端加宽的U形钢连接件6的内部设置有2块横向加强钢板9；带凹槽的钢连接板2的宽度与方钢管再生块体混凝土柱1的横截面边长相等，底板局部削弱且单端加宽的U形钢连接件6在加宽端的底板宽度与方钢管再生块体混凝土柱1的横截面边长相等；底板局部削弱且单端加宽的U形钢连接件6的底板削弱形式为圆弧形。As shown in Fig. 1 and Fig. 2, the joint connection of a regenerated block concrete composite beam-column includes a square steel tube regenerated block concrete column 1, a U-shaped outer steel regenerated block concrete beam 7, and the bottom plate is partially weakened and single. End widened U-shaped steel connecting piece 6, grooved steel connecting plate 2 and single-end threaded short reinforcing bar 3; in Fig. 1, in order to clearly show U-shaped outer steel recycled bulk concrete beam and square steel pipe regeneration block The detailed structure of the concrete column, the concrete of the beam and column is hidden. A U-shaped steel connecting member 6 and a grooved steel connecting plate 2 partially weakened and single-ended widened are welded on the outer wall of the square steel pipe 11 in the core region of the node; one end of the single-end threaded short reinforcing bar 3 is welded to the belt In the groove of the steel connecting plate 2 of the groove, the other end is connected with the upper longitudinal rib 5 of the U-shaped steel-recycled steel concrete beam 7 through the steel sleeve 4; the diameter of the single-end threaded short steel bar 3 Less than the diameter of the upper longitudinal rib 5 of the U-shaped outer steel reclaimed concrete beam 7; the U-shaped steel connecting piece 6 with a partially weakened and single-ended widened base and the U-shaped of the U-shaped outer steel recycled bulk concrete beam 7 The outer steel 10 is bolted; the bottom of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened is provided with two transverse reinforcing steel plates 9; the width of the grooved steel connecting plate 2 and the square steel pipe regeneration The cross-section side length of the block concrete column 1 is equal, and the width of the bottom plate of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened at the widened end is equal to the cross-sectional side length of the square steel pipe regenerated block concrete column 1; The bottom plate of the partially weakened and single-ended widened U-shaped steel joint 6 is weakened in the form of a circular arc.
本实施例中，方钢管再生块体混凝土柱1的方钢管11采用焊接钢管，方钢管11的横截面尺寸为450mm×450mm，壁厚10mm。In the present embodiment, the square steel pipe 11 of the square steel pipe regenerated block concrete column 1 is a welded steel pipe, and the square steel pipe 11 has a cross-sectional dimension of 450 mm × 450 mm and a wall thickness of 10 mm.
本实施例中，U形外包钢10的腹板高度、底板宽度和板厚分别为400mm、200mm和10mm，底板局部削弱且单端加宽的U形钢连接件6的非加宽端的腹板高度、底板宽度和板厚分别为400mm、220mm和10mm，底板局部削弱且单端加宽的U形钢连接件6的加宽端的腹板高度、底板宽度和板厚分别为400mm、450mm和10mm。In the present embodiment, the web height, the bottom plate width and the plate thickness of the U-shaped outer steel 10 are 400 mm, 200 mm and 10 mm, respectively, and the non-widened end of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened. The height of the plate, the width of the bottom plate and the thickness of the plate are 400 mm, 220 mm and 10 mm, respectively. The web height, the width of the bottom plate and the thickness of the plate at the widened end of the U-shaped steel connecting piece 6 which is partially weakened and single-ended widened are 400 mm, 450 mm and respectively. 10mm.
本实施例中，方钢管再生块体混凝土柱1和U形外包钢再生块体混凝土梁7的内部填充有废旧混凝土块体12和新混凝土13，所述废旧混凝土块体12为旧有建筑物、构筑物、道路去除全部或部分钢筋后破碎而成的块体，废旧混凝土块体12的特征尺寸不低于60mm。废旧混凝土块体12与方钢管11、U形外包钢10、底板局部削弱且单端加宽的U形钢连接件6之间以及不同废旧混凝土块体12之间的空隙填满新混凝土13，废旧混凝土块体12与新混凝土13的质量比为1:2。In the present embodiment, the inside of the square steel pipe regenerated block concrete column 1 and the U-shaped outer steel reclaimed block concrete beam 7 are filled with the waste concrete block 12 and the new concrete 13, and the waste concrete block 12 is an old building. The block of the object, the structure, and the road after the whole or part of the steel bar is removed, and the characteristic size of the waste concrete block 12 is not less than 60 mm. The gap between the waste concrete block 12 and the square steel tube 11, the U-shaped outer steel 10, the partially weakened and single-ended widened U-shaped steel joint 6 and the gap between the different waste concrete blocks 12 is filled with new concrete 13 The mass ratio of the waste concrete block 12 to the new concrete 13 is 1:2.
本实施例中，底板局部削弱且单端加宽的U形钢连接件6的加宽端的腹板通过角焊缝与节点核心区的方钢管11的外壁焊接，底板局部削弱且单端加宽的U形钢连接件6的加宽端的底板通过坡口对接焊缝与节点核心区的方钢管11的外壁焊接；带凹槽的钢连接板2通过坡口对接焊缝与节点核心区的方钢管11的外壁焊接；单端带螺纹的短钢筋棒3通过角焊缝与带凹槽的钢连接板2焊接。In this embodiment, the web of the widened end of the U-shaped steel connecting member 6 which is partially weakened and partially single-ended widened is welded to the outer wall of the square steel pipe 11 of the core portion of the node through the fillet weld, and the bottom plate is partially weakened and single-ended widened. The bottom plate of the widened end of the U-shaped steel connecting member 6 is welded to the outer wall of the square steel pipe 11 of the node core region through the groove butt weld; the grooved steel connecting plate 2 is butt welded to the core portion of the node through the groove The outer wall of the steel pipe 11 is welded; the single-end threaded short steel bar 3 is welded to the grooved steel connecting plate 2 by a fillet weld.
本实施例中，U形外包钢10与底板局部削弱且单端加宽的U形钢连接件6的非加宽端的搭接长度取为100mm，并采用高强螺栓8进行连接，高强螺栓8选用10.9级的M20螺栓。In this embodiment, the U-shaped outer steel 10 and the bottom plate are partially weakened and the single-end widened U-shaped steel connecting member 6 has a non-widening end overlapping length of 100 mm, and is connected by a high-strength bolt 8, and the high-strength bolt 8 Use M20 bolts of class 10.9.
本实施例中，底板局部削弱且单端加宽的U形钢连接件的内部平行设置2块横向加强钢板9，且横向加强钢板9与底板局部削弱且单端加宽的U形钢连接件6的内壁焊接固定。In this embodiment, the U-shaped steel connecting piece of the bottom plate partially weakened and single-ended widened is provided with two horizontal reinforcing steel plates 9 in parallel, and the U-shaped steel connecting piece with the lateral reinforcing steel plate 9 and the bottom plate partially weakened and single-ended widened. The inner wall of 6 is welded and fixed.
上述一种再生块体混凝土组合梁-柱的节点连接的施工方法，包括如下步骤：The construction method of the node connection of the above-mentioned recycled concrete composite beam-column includes the following steps:
（1）将单端带螺纹的短钢筋棒3焊接于带凹槽的钢连接板2的凹槽中；定位底板局部削弱且单端加宽的U形钢连接件6和焊有单端带螺纹的短钢筋棒3的带凹槽的钢连接板2，并将二者焊接在节点核心区的方钢管外壁上；(1) welding a single-end threaded short steel bar 3 into a groove of the grooved steel connecting plate 2; positioning the bottom plate partially weakened and single-ended widened U-shaped steel connecting piece 6 and welded with a single end tape a grooved steel connecting plate 2 of a short steel rod 3 of threaded thread, and welding the two on the outer wall of the square steel pipe in the core region of the joint;
（2）采用高强螺栓8将底板局部削弱且单端加宽的U形钢连接件6与U形外包钢再生块体混凝土梁7的U形外包钢10进行连接；采用钢套筒4将U形外包钢再生块体混凝土梁7的上部纵筋5与单端带螺纹的短钢筋棒3连接；(2) U-shaped steel connecting piece 6 partially weakened and single-ended widened by high-strength bolt 8 is connected with U-shaped outer steel 10 of U-shaped outer steel reclaimed concrete beam 7; steel sleeve 4 is used The upper longitudinal rib 5 of the U-shaped outer steel-recycled concrete beam 7 is connected to the single-end threaded short steel bar 3;
（3）提前将废旧混凝土块体12充分湿润，并在方钢管再生块体混凝土柱1内先浇筑一层厚度25mm-35mm的新混凝土13；将废旧混凝土块体12和新混凝土13交替置入方钢管再生块体混凝土柱1的内部并充分振捣；(3) The waste concrete block 12 is sufficiently wetted in advance, and a new concrete 13 having a thickness of 25 mm-35 mm is first poured in the concrete column 1 of the square steel pipe regeneration block; the waste concrete block 12 and the new concrete 13 are alternately placed. The square steel tube regenerates the interior of the concrete column 1 and is fully vibrated;
（4）将废旧混凝土块体12一次性投入U形外包钢10和底板局部削弱且单端加宽的U形钢连接件6的内部，然后灌入新混凝土13并充分振捣。(4) The waste concrete block 12 is once put into the U-shaped outer steel 10 and the inside of the U-shaped steel connecting member 6 which is partially weakened and single-ended widened, and then poured into the new concrete 13 and sufficiently vibrated.
本实施例中，方钢管11、U形外包钢10、底板局部削弱且单端加宽的U形钢连接件6和带凹槽的钢连接板2均采用Q345B钢材，焊条采用E50形，焊剂F4A0，焊缝质量等级为一级。U形外包钢再生块体混凝土梁7的上部纵筋5采用HRB400热轧钢筋，新混凝土13的强度等级为C35，废旧混凝土块体12的强度等级为C30。如上所述，即可较好地实现本发明。In this embodiment, the square steel pipe 11, the U-shaped outer steel 10, the U-shaped steel connecting member 6 and the grooved steel connecting plate 2 which are partially weakened and single-ended widened are all made of Q345B steel, and the welding rod adopts E50 shape. Flux F4A0, weld quality grade is one level. The upper longitudinal rib 5 of the U-shaped outer steel recycled concrete beam 7 is made of HRB400 hot-rolled steel bar, the new concrete 13 has a strength grade of C35, and the waste concrete block 12 has a strength grade of C30. As described above, the present invention can be preferably carried out.
根据本发明的方法，还可以开发一系列的实施例，并非对本发明作任何形式上的限制，故依据本发明的技术实质对以上实例所作的任何简单的修改、等同变化与修饰，仍属于本发明技术方案的范围。
In accordance with the method of the present invention, a series of embodiments may be developed without any limitation on the present invention, and any simple modifications, equivalent changes, and modifications made to the above examples in accordance with the technical spirit of the present invention still belong to the present invention. The scope of the inventive solution.
Claims (6)
- 一种再生块体混凝土组合梁-柱的节点连接，其特征在于：包括方钢管再生块体混凝土柱、U形外包钢再生块体混凝土梁、底板局部削弱且单端加宽的U形钢连接件、带凹槽的钢连接板和单端带螺纹的短钢筋棒；在节点核心区的方钢管外壁上焊接底板局部削弱且单端加宽的U形钢连接件和带凹槽的钢连接板；单端带螺纹的短钢筋棒的一端焊接在带凹槽的钢连接板的凹槽中，另一端与U形外包钢再生块体混凝土梁的上部纵筋通过钢套筒进行连接；单端带螺纹的短钢筋棒的直径小于U形外包钢再生块体混凝土梁的上部纵筋的直径；底板局部削弱且单端加宽的U形钢连接件与U形外包钢再生块体混凝土梁的U形外包钢之间采用焊接、螺栓连接或栓焊连接；底板局部削弱且单端加宽的U形钢连接件的内部设置有2~4块横向加强钢板；带凹槽的钢连接板的宽度与方钢管再生块体混凝土柱的横截面边长相等，底板局部削弱且单端加宽的U形钢连接件在加宽端的底板宽度与方钢管再生块体混凝土柱的横截面边长相等。A joint connection of a regenerated block concrete composite beam-column, which comprises: a square steel tube regenerated block concrete column, a U-shaped outer steel reclaimed block concrete beam, a partially weakened U-shaped steel with a single-end widening Connecting piece, grooved steel connecting plate and single-end threaded short reinforcing bar; welded U-shaped steel connecting piece and grooved steel with partially weakened and single-end widened on the outer wall of square steel pipe in the core area of the joint Connecting plate; one end of the single-end threaded short steel bar is welded in the groove of the grooved steel connecting plate, and the other end is connected with the upper longitudinal rib of the U-shaped steel-recycled steel concrete beam through the steel sleeve The diameter of the single-end threaded short steel bar is smaller than the diameter of the upper longitudinal rib of the U-shaped outer steel recycled concrete beam; the bottom plate is partially weakened and the single-end widened U-shaped steel joint and U-shaped steel are recycled The U-shaped outer steel of the block concrete beam is welded, bolted or bolted; the U-shaped steel connecting piece partially weakened and single-ended widened is provided with 2~4 transverse reinforcing steel plates; The width of the steel connecting plate of the groove and the square steel pipe regeneration block The width of the cross-section of the concrete column is equal, and the width of the bottom plate of the U-shaped steel connecting piece which is partially weakened and single-ended widened at the widened end is equal to the cross-sectional side length of the concrete column of the square steel pipe regenerated block.
- 根据权利要求1所述的再生块体混凝土组合梁-柱的节点连接，其特征在于：所述方钢管再生块体混凝土柱和U形外包钢再生块体混凝土梁的内部填充有废旧混凝土块体和新混凝土，废旧混凝土块体与方钢管、U形外包钢、底板局部削弱且单端加宽的U形钢连接件之间以及不同废旧混凝土块体之间的空隙填满新混凝土，废旧混凝土块体与新混凝土的质量比为1:4~1:1。The joint connection of the regenerated block concrete composite beam-column according to claim 1, wherein the square steel tube regenerated block concrete column and the U-shaped outer steel regenerated block concrete beam are filled with waste concrete blocks. Body and new concrete, waste concrete blocks and square steel tubes, U-shaped outer steel, partially weakened and single-ended widened U-shaped steel joints and gaps between different waste concrete blocks are filled with new concrete, The mass ratio of waste concrete block to new concrete is 1:4~1:1.
- 根据权利要求1所述的再生块体混凝土组合梁-柱的节点连接，其特征在于：所述底板局部削弱且单端加宽的U形钢连接件，其底板削弱的形式为圆弧形。The node connection of the regenerated block concrete composite beam-column according to claim 1, wherein the bottom plate is partially weakened and the single-end widened U-shaped steel connecting member has a bottom plate weakened form in a circular arc shape.
- 根据权利要求1所述的再生块体混凝土组合梁-柱的节点连接，其特征在于：所述单端带螺纹的短钢筋棒与U形外包钢再生块体混凝土梁的上部纵筋的钢套筒连接为螺纹连接。The joint connection of the regenerated block concrete composite beam-column according to claim 1, characterized in that: the single-end threaded short steel bar and the U-shaped outer steel regenerated block concrete beam upper longitudinal reinforcement steel The sleeve connection is a threaded connection.
- 根据权利要求2所述的再生块体混凝土组合梁-柱的节点连接，其特征在于：所述废旧混凝土块体为旧有建筑物、构筑物、道路去除全部或部分钢筋后破碎而成的块体，且废旧混凝土块体的特征尺寸不低于60mm。The joint connection of the regenerated block concrete composite beam-column according to claim 2, wherein the waste concrete block is a block formed by breaking old or damaged parts of the old building, structure or road. And the characteristic size of the waste concrete block is not less than 60 mm.
- 一种如权1至权5中任一项所述的再生块体混凝土组合梁-柱的节点连接的施工方法，其特征在于，包括如下步骤：A method for constructing a joint connection of a regenerated block concrete composite beam-column according to any one of claims 1 to 5, characterized in that it comprises the following steps:（1）将单端带螺纹的短钢筋棒焊接于带凹槽的钢连接板的凹槽中；定位底板局部削弱且单端加宽的U形钢连接件和焊有单端带螺纹的短钢筋棒的带凹槽的钢连接板，并将二者焊接在节点核心区的方钢管外壁上；(1) Welding a single-end threaded short steel bar into the groove of the grooved steel connecting plate; positioning the bottom plate partially weakened and single-ended widened U-shaped steel connecting piece and welded with single-ended threaded short a grooved steel connecting plate of the reinforcing bar and welding the two on the outer wall of the square steel pipe in the core area of the joint;（2）将底板局部削弱且单端加宽的U形钢连接件与U形外包钢再生块体混凝土梁的U形外包钢进行焊接、螺栓连接或栓焊连接；采用钢套筒将U形外包钢再生块体混凝土梁的上部纵筋与单端带螺纹的短钢筋棒连接；(2) U-shaped steel joints with partial weakening and single-end widening of the bottom plate are welded, bolted or bolted with U-shaped outer steel of U-shaped steel-recycled concrete beams; steel sleeves are used The upper longitudinal reinforcement of the U-shaped outer steel recycled concrete beam is connected with the short-ended steel rod with single-end threaded;（3）提前将废旧混凝土块体充分湿润，并在方钢管再生块体混凝土柱内先浇筑一层厚度25mm-35mm的新混凝土；将废旧混凝土块体和新混凝土交替置入方钢管再生块体混凝土柱的内部并充分振捣；(3) The waste concrete block is fully wetted in advance, and a new layer of concrete with a thickness of 25mm-35mm is firstly poured in the concrete column of the square steel pipe regeneration block; the waste concrete block and the new concrete are alternately placed into the square steel pipe regeneration block. The interior of the concrete column is fully vibrated;（4）将废旧混凝土块体一次性投入U形外包钢和底板局部削弱且单端加宽的U形钢连接件的内部，然后灌入新混凝土并充分振捣。(4) Put the waste concrete block into the U-shaped outer steel and the inside of the U-shaped steel joint with the base weakened and single-ended widened at one time, then pour into the new concrete and fully vibrate.
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| CN201610940149.7 | 2016-10-25 | ||
| CN201610940149.7A CN106522381B (en) | 2016-10-25 | 2016-10-25 | A kind of connection of regeneration monolith combination beam-column node and its construction method |
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| CN106522381B (en) | 2019-05-14 |
| CN106522381A (en) | 2017-03-22 |
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