双铰机制蜂窝梁-柱端板连接节点的抗震性能试验研究  

Seismic performance of castellated beam-to-column end-plate joints with dual hinge mechanism

作　　者：毕然[1] 许峰[1] 贾连光[1] 王庆贺 王春刚[1] BI Ran;XU Feng;JIA Lianguang;WANG Qinghe;WANG Chungang(College of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《建筑结构学报》2024年第12期56-71,共16页Journal of Building Structures

基　　金：国家自然科学基金青年项目(51808351);国家自然科学基金项目(51978422)。

摘　　要：为解决实腹梁-柱端板连接应力水平高导致的焊缝脆断,使框架梁发展塑性变形,提出了蜂窝梁-柱端板连接(CBE)节点。通过对12个节点进行低周往复荷载试验,研究了楼板、端板和开孔参数对节点破坏形态和滞回性能的影响,明确了CBE节点的塑性开展次序和双塑性铰破坏机制。试验结果表明:双铰破坏机制优于端板塑性铰破坏机制,增大开孔率有利于梁端塑性先于连接塑性得到发展从而保护节点域;与实腹式节点相比,CBE节点的塑性变形能力提高约14%,刚度退化更平稳,位移延性系数和耗能分别提高42%和30%。提出了适用于CBE节点受弯承载力的计算方法,计算结果与试验和有限元结果吻合较好。In this paper,a castellated beam-to-column end-plate(CBE)joint was proposed to address the problem of brittle fracture of welds caused by high stresses in solid web beam-to-column end-plate connections and the development of plastic deformations in frame beams.Cyclic loading tests of 12 CBE joints were conducted to investigate the effects of floor,end-plate and opening parameters on the failure mode and hysteresis performance of the joints.The development of plasticity and the dual hinge failure mechanism of CBE joints were clarified.It is shown that the dual hinge failure mechanism is superior to the plastic hinge failure mechanism of the end-plate.A larger opening rate allows the beam to form a plastic hinge earlier than the connection,thus protecting the joint zone.Compared with solid-web joints,CBE joints demonstrate larger plastic deformation capacities(improved by about 14%)and smoother stiffness degradations.The ductility coefficient and energy consumption of the joints are 42%and 30%higher than those of solid-web joints,respectively.In addition,a calculation method for the bending bearing capacity of CBE joints was proposed.The calculation results are in good accordance with the experimental results and finite element analysis results.

关 键 词：蜂窝梁 端板连接节点 拟静力试验 双铰机制 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1