单双向压弯作用下矩形空心桥墩抗震性能比较

发布时间：2018-05-23 11:03

本文选题：空心桥墩 + 双向弯曲　；参考：《世界地震工程》2014年01期

【摘要】：通过恒定轴力下的水平单向加载拟静力试验和双向加载拟静力试验,研究了矩形空心桥墩在单、双向压弯作用下抗震性能的差异,重点比较了其在不同加载条件下的受力过程、破坏机理、滞回特性、承载能力、延性和耗能能力。结果表明:单、双向压弯作用下,各矩形空心截面试件的破坏形态均为整体弯曲破坏,但在双向耦合作用影响下,双向压弯墩柱的承载能力、变形能力、延性严重削弱,双向压弯墩柱的累积总耗能也远小于单向压弯墩柱。初步研究结果显示,仅考虑水平单向地震作用情形分析矩形空心桥墩的抗震能力可能偏于不安全。
[Abstract]:The difference of seismic behavior of rectangular hollow bridge pier under single and bidirectional compression and bending is studied by quasi-static test of horizontal unidirectional loading and biaxial loading under constant axial force, and the stress process of rectangular hollow bridge pier under different loading conditions is emphatically compared. Failure mechanism, hysteresis characteristics, bearing capacity, ductility and energy dissipation capacity. The results show that under the action of single and biaxial bending, the failure pattern of each rectangular hollow section specimen is integral bending failure, but under the influence of bidirectional coupling, the bearing capacity, deformation capacity and ductility of the column are seriously weakened. The accumulative total energy consumption of biaxial bending pier column is also much smaller than that of unidirectional bending pier column. The preliminary results show that the seismic capacity of rectangular hollow bridge piers may be less safe when considering the horizontal unidirectional seismic action only.
【作者单位】：防灾科技学院;北京工业大学城市与工程安全减灾教育部重点实验室;
【基金】：中央高校基本科研业务费青年教师资助计划项目(ZY20130206) 河北省教育厅科学研究计划项目(Z2011105)
【分类号】：U442.55

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