摘要
为了研究不同因素对矩形空心桥墩极限状态的影响,基于能力谱法,采用有限元软件Open Sees对10个试验墩柱的数值模型进行计算分析。主要研究了不同因素作用下能力谱法计算的墩柱极限位移及承载力变化规律。结果证明:增大配筋率能够提高墩柱性能极限,大轴压构件极限状态要小于小轴压比构件,增加了剪切破坏的可能性,削弱了性能增强效果;体积配筋率增加,使得破坏控制承载力延后;高墩柱增大了位移延性,但也提高了结构柔度,降低了承载力,研究成果具有一定的实践指导意义。
In order to study the effects of different factors on the limit state of rectangular hollow pier, based on the capacity spectrum method, this paper uses the BWH model of the finite element software OpenSees （ beam hinge u- nit） to calculating and analyzing numerical model of 10 test piers. The main content is the change rule of limit displacement and that increasing bearing capacity calculated by the capacity spectrum method under different factors. Results show reinforcement ratio can improve the limit performance of the pier. The limit state in large axial corn- pression ratio is smaller than small axial compression ratio, increasing the possibility of shear failure, weakening the performance enhancement effect. The damage control delays with volume ratio increasing. High pier improves the ductility, but also improves the flexibility, reduces the bearing capacity. The research has a certain practical significance.
出处
《世界地震工程》
CSCD
北大核心
2017年第3期121-127,共7页
World Earthquake Engineering
基金
国家自然科学基金资助项目(51378169)
河北省自然科学基金资助项目(E2013402072)
