可更换波形钢腹板连梁低周反复加载试验研究  

Study of low circumferential repeated loading tests on replaceable link beam with corrugated steel web

作　　者：贺君 滕强 奉思东 李传习 HE Jun;TENG Qiang;FENG Sidong;LI Chuanxi(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《交通科学与工程》2024年第4期47-56,共10页Journal of Transport Science and Engineering

基　　金：国家自然科学基金资助项目(51978081);湖南省自然科学基金资助项目(2021JJ30712);长沙理工大学研究生科研创新项目(CX2021SS132)。

摘　　要：为研发新型、可更换的消能构件及建立震后性能可快速恢复的桥梁结构体系,提出一种新型的波形钢腹板消能连梁并将其应用于桥墩横梁或盖梁上。通过对6个消能连梁进行低周反复加载试验,比较了不同跨高比、腹板形式(波形和工字形)试件的破坏机理及滞回曲线、骨架曲线、位移延性系数等抗震性能参数。研究结果表明:试件失效分为翼缘板-端板焊缝断裂、腹板撕裂和翼缘板及腹板屈曲破坏三种破坏形态,在波形腹板连梁加载后期翼缘板屈曲导致试件整体破坏;在各试件转角相同的情况下,波形钢腹板连梁的耗能能力比工字形钢腹板连梁的强,跨高比小的波形连梁具有更好的荷载保持能力与耗能能力,但延性较差。In order to develop a new type of replaceable energy dissipating structure and establish a rapid recoverable system of bridges after the earthquake,a new type of link beam with corrugated steel web is proposed to apply in the crossbeam or bent cap of bridge piers.Repeated low-period loading tests were conducted on six energy dissipating beams to compare the damage mechanisms and seismic performance parameters,such as hysteresis curves,skeleton curves,and displacement ductility coefficients of specimens with different span-to-height ratios and web forms(corrugated and I-beam).The experimental results indicate that there are three typical failure modes of test specimens:fracture at the weld seam connecting link flange to end plate,fracture at the web and bucking at the flange and the web.As well as the whole specimen failure due to flange buckling in the late loading stage of a wave web link girder.In the case of the same turning angle of each specimen,the energy dissipation capacity of the corrugated steel web link beam is stronger than that of the I-beam,and the corrugated link beam with a small span-to-height ratio has a good load retention capacity and energy dissipation capacity,but its ductility is poorer.Under the same rotation of each specimen,the energy dissipation capacity of specimens with corrugated steel webs is better than that of specimens with I-shaped steel webs.The corrugated weblink beam with smaller span-height ratio has better load retention capacity and energy dissipation capacity,but has less ductility.

关 键 词：可更换消能连梁 波形钢腹板 抗震性能 拟静力试验 耗能能力 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]