长周期地震荷载作用下高层建筑动力特性分析
Analysis of theDynamic Characteristics of High-rise Buildings Under Long-period Earthquake Loads
武星星1
作者信息
- 1. 山西宏泽工程检测有限公司,山西 太原 030000
- 折叠
摘要
相关研究表明,长周期地震荷载通常与地震波的低频成分相关,这些低频成分可能会引起建筑结构的共振现象,从而导致较大的动力响应.为研究长周期地震荷载对高层建筑动力特性的影响规律,文中首先基于PEER强震数据库选取若干具有不同频谱特性的实测地震动记录,以某高层建筑工程为研究对象,对比模型位移、层间角和内力响应,探讨长周期地震荷载对高层建筑动力响应的影响规律.结果表明,与普通地震动相比,长周期地震反应谱有着较宽的反应谱敏感区,能够引起结构更大的地震响应.文中以三次地震的实测地震波为例,在长周期地震作用下,结构层间角和底部截面弯矩峰值平均增大约2.5 倍和2.3 倍.
Abstract
Research indicates that long-period earthquake loads are typically associated with the low-frequency components of seismic waves,which may induce resonance phenomena in building structures,leading to significant vibration responses.To investigate the influence patterns of long-period earthquake loads on the dynamic characteristics of high-rise buildings,this study firstly selects several measured seismic records with different spectral characteristics from the PEER strong motion database.A specific high-rise building project is chosen as the research subject.By comparing model displacements,inter-story drifts,and internal force responses,the impact of long-period earthquake loads on the dynamic responses of high-rise buildings is explored.The research findings demonstrate that,compared to conventional seismic loads,long-period earthquake loads exhibit wider response spectrum sensitive zones,thereby causing larger seismic responses in structures.Taking meas-ured seismic waves selected from three seismic events as examples,under the action of long-period earthquake loads,the inter-story drifts and bottom section bending moment peaks of structures increase on average by approximately 2.5 times and 2.3 times,respectively.
关键词
长周期/地震荷载/高层建筑/动力响应Key words
Long-period/Seismic loads/High-rise buildings/Dynamic response引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据