摘要
为研究双波形薄钢板在达到或接近钢材屈服时的弹塑性屈曲行为,完成了4个不同螺栓间距的双波形薄钢板试件和1个单片波形薄钢板试件在往复剪切荷载作用下的拟静力试验。结果表明:设计合理的双波形薄钢板能够先达到全截面屈服抗剪承载力,然后在往复剪切荷载作用下交替发生弹塑性局部剪切屈曲,形成X形屈曲褶皱及撕裂裂缝而破坏;双波形薄钢板的极限抗剪承载力大于单片波形薄钢板的2倍,最大提高约18%;双波形薄钢板的滞回曲线表现出一定的“捏拢”现象,在其抗剪承载力达到峰值之后,随着滞回圈数的增加其抗剪承载力和卸载刚度退化明显,但其等效黏滞阻尼系数无显著下降;双波形薄钢板在剪切荷载作用下可分为弹性、弹塑性局部屈曲以及承载力退化3个工作阶段,由于波形钢板的“手风琴”效应,双波形薄钢板基本不具备屈曲后抗剪承载力,其极限抗剪承载力状态即为弹塑性局部剪切屈曲状态。
In order to research the elastic-plastic buckling behavior of double-corrugated thin steel plate upon reaching or approaching steel yield stress,the quasi-static tests of four double-corrugated thin steel plate specimens with different bolt spacings and one single-corrugated thin steel plate specimen subjected to cyclic shear load were completed.The results show that the rationally designed double-corrugated thin steel plate can reach the full-section yield shear capacity firstly,and then the double-corrugated thin steel plate undergo elastic-plastic local shear buckling alternately under cyclic shear load,forming X-shaped buckling folds and tearing cracks to destroy.The ultimate shear capacity of double-corrugated thin steel plate is more than twice that of single-corrugated thin steel plate,and the maximum increase is about 18%.Hysteretic curve of double-corrugated thin steel plate shows a certain pinch phenomenon,and the shear capacity and unloading stiffness of double-corrugated thin steel plate degrade obviously with the increase of hysteresis number after the shear capacity reaches peak value,but its equivalent damping ratio does not decrease significantly.The double-corrugated thin steel plate can be divided into three working stages:elastic,elastic-plastic local buckling and shear capacity degradation.Due to the accordion effect of corrugated steel plate,the double-corrugated thin steel plate has not shear capacity increasing after buckling,and its elastic-plastic local shear buckling state can be defined as ultimate shear capacity state.
作者
王宇航
杨均德
梁艳来
兰涌森
罗伟
邓然
WANG Yu-hang;YANG Jun-de;LIANG Yan-lai;LAN Yong-sen;LUO Wei;DENG Ran(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Chongqing Technology and Business Institute,Chongqing 401520,China;CSIC Haizhuang Wind Power Co.,Ltd,Chongqing 401122,China)
出处
《建筑科学与工程学报》
CAS
北大核心
2020年第4期14-22,共9页
Journal of Architecture and Civil Engineering
基金
重庆市自然科学基金重点项目(cstc2019jcyj-zdxm0088)。
关键词
双波形薄钢板
弹塑性屈曲
拟静力试验
抗剪承载力
薄钢板剪力墙
double-corrugated thin steel plate
shear capacity
elastic-plastic buckling
quasi-static test
thin steel plate shear wall
