摘要
巴东5.1级地震造成大量简易房屋不同程度的破坏。土坯结构的典型震害特征为局部倒塌和竖向开裂,石砌体结构的典型震害特征为局部倒塌和局部垮落。对震中附近记录到的地震波分析结果表明,地震动的高频成分极为丰富,卓越周期约为0.1 s,与单层简易房屋自振周期吻合,而共振效应是单层简易房屋震害重于其他柔性结构的重要外因;灾区简易房屋普遍存在的结构体系稳定性差、构件强度不足、节点连接弱等缺陷是震害较重的内因。
Badong Ms5.1 earthquake in Hubei province caused various damages of simple buildings. The typical damage characteristics of adobe structures mainly includes partial collapse and vertical crack. While the damage patterns of masonry structures partial collapsing and falling. The analysis result of strong ground motion of the Earthquake show that ground motion concentrates in high-frequency contents and its predominant period is of 0. 1 s, which might lead to heavy damage of one-storey simple structures. Poor stability of structure system of simple houses, insufficient intensity of components, and weak connection of nodes are the intrinsic factors of seismic damage.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第3期20-22,27,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金项目(41004020)
关键词
巴东地震
震害分析
抗震设计
地震动加速度
自振周期
Badong earthquake
seismic damage investigation
aseismic design
ground motion acceleration
natural period of vibration
