摘要
为定量比较地震动的强度参数,基于钢筋混凝土框架结构模型开展非线性时程响应分析,比较分析了层间位移角随地震动入射方向的变化特征,对比32种地震动强度参数的方向性差异,研究了算数平均、最大值、平方和平方根3种双向组合强度参数的适用性,并提出了考虑地震动入射方向影响的结构易损性评估方法。结果表明,近断层脉冲型地震动强度参数也具有显著的方向性差异,基于算数平均、平方和平方根的双向地震动强度参数表现相对较好,基于速度指标的组合强度参数适用于中、长周期结构,而基于加速度的组合强度参数适用于短周期结构。
To quantitatively compare various intensity measures,nonlinear time history analysis was performed on a set of reinforced concrete frame structure models.Thirty-two kinds of intensity measures and three kinds of the combined index of bi-directional intensity measures,including the arithmetic mean,the square root of sum square,and the maximum,were analyzed.A fragility assessment method considering the influence of input ground motion direction was proposed.The experimental results show significant directional differences in the intensity parameters of near-fault impulse ground motion.The bi-directional intensity measures based on arithmetic average and square root of sum square perform relatively well.Comparatively,the intensity measures based on velocity are suitable for medium and long-period structures,while the intensity measures based on acceleration are suitable for short-period structures.
作者
鲁航
蒲武川
LU Hang;PU Wu-chuan(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
2021年第2期72-78,共7页
Journal of Wuhan University of Technology
关键词
双向地震动
脉冲型地震动
地震动强度参数
易损性分析
bidirectional ground motion
pulse-like ground motion
intensity measure
fragility analysis
作者简介
鲁航(1996-),男,硕士生.E-mail:luhang@whut.edu.cn
