预埋型螺栓连接件的可拆换性能研究  

Study on the demountable performance of embedded bolt connectors

作　　者：门进杰[1,2] 杜天宇 李家富[3] 张谦 王家琛 MUDASSAR Ali MEN Jinjie;DU Tianyu;LI Jiafu;ZHANG Qian;WANG Jiachen;MUDASSAR Ali(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education,Xi’an University of Architecture and Technology,Xi’an 710055,China;MCC Capital Engineering&Research Incorporation Limited,Beijing 100176,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点试验室,陕西西安710055 [3]中冶京诚工程技术有限公司,北京100176

出　　处：《地震工程与工程振动》2025年第2期86-96,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52178160);陕西省教育厅重点科学研究计划项目(21JY023)。

摘　　要：文中提出了一种预埋型螺栓连接件,通过设置预埋钢块和螺栓锥套,减少受载时混凝土和钢梁的损伤,实现组合梁的可拆换。设计制作了8组试件,推出试验后拆卸,并对拆卸后的组件重新使用并加载,分析其可拆换性能。探讨了螺栓直径、螺栓强度、有无T形钢块和预埋钢块外径等因素的影响规律。研究结果表明:试件破坏时螺栓剪断或混凝土压溃;8组试件加载后均可快速拆卸;拆卸后的钢梁和T形钢块可多次重复使用;加载后处于无损伤和轻微损伤状态的混凝土板可重复使用2次以上且试件的抗剪性能基本不变;处于损伤状态的混凝土板可重复使用1次,但试件的抗剪性能降低;处于严重损伤状态的混凝土板不可重复使用。此外,预埋型螺栓连接件具有良好的抗掀起性能;螺栓直径或强度的增加,试件的承载力和混凝土板的损伤增加;预埋钢块外径增加,试件的承载力不变,但混凝土板的损伤减少;有无T形钢块对试件的承载力基本没有影响,但可以提高可拆换性能。最后提出了混凝土板局部损伤系数η作为可拆换性能控制指标,当η在0.5左右时可拆换状态较好。In this paper,a kind of embedded bolt connector was proposed.The utilization of embedded steel blocks and bolt taper sleeves can reduce the damage to concrete and steel beams under load,and enable the removal and replacement of the composite beam.Eight groups of specimens were designed and manufactured.After the push-out test,the specimens were removed and reassembled.Subsequently,a reloading test was conducted and the demountable ability were analyzed.The influence of bolt diameter,bolt strength,T-shaped steel block and external diameter of the embedded steel block were discussed.The results showed that when the specimen was damaged,the bolt was cut or the concrete was crushed.Eight groups of specimens could be quickly disassembled after loading.The dismantled steel beam and T-shaped steel block could be reused for many times.After loading,the concrete slab in undamaged and slightly damaged state could be reused for more than twice,and the shear performance of the specimen remained basically unchanged.The concrete slab in a damaged condition can be reused once,but its shear resistance will be reduced.The concrete slab in a severely damaged condition is not to be reused.In addition,the embedded bolt connector has good anti-lift performance.With an increase of bolt diameter or strength,the bearing capacity of specimen and the damage of concrete slab increased.With an increase in the outer diameter of the embedded rigid block,the bearing capacity of the specimen remained unchanged,while the damage to the concrete slab decreased.The presence or absence of T-shaped rigid block had little impact on the bearing capacity of the specimen,but could enhance the demountable performance.Finally,the local damage coefficientηof concrete slab was proposed as the control index for demountable performance,and whenηis about 0.5,it is in a good demountable state.

关 键 词：组合梁 预埋型螺栓连接件 推出试验 可拆换性能 可拆换性能指标 

分 类 号：TU398[建筑科学—结构工程]