摘要
四川芦山7.0级强烈地震影响区域内有大量的砌体结构房屋,既有未采取任何抗震构造措施的非约束砌体结构,也有设置了圈梁和构造柱的约束砌体结构。文中首先简要讨论了本次地震强震动特性,表明其高频成分丰富,反应谱中低频部分衰减较快,是刚性结构和柔性结构地震破坏表现差别较大的原因之一;继而论文重点以现场震害调查资料为基础,总结了不同烈度区、不同类型砌体结构的震害特征;高烈度区不同类型砌体结构的震害程度和破坏比对比表明,约束砌体结构的抗震性能明显优于非约束砌体结构。
Masonry structure,either unconfined or confined,is one of the major structural systems in the area affected by the M7.0 Lushan earthquake in 2013.The characteristics of strong ground motions obtained during the earthquake are briefly discussed to show that the ground motions are rich in short-period contents,which may lead to heavy damage to stiff structures like masonry houses.Based on the materials collected during the emergency building inspection immediately after the earthquake,damage patterns of various types of masonry structures in areas with different intensities during the earthquake are summarized.Comparisons of damage rates befween unconfined and confined masonry structures show that the latter demonstrates much better seismic performance than the former.
出处
《地震工程与工程振动》
CSCD
北大核心
2013年第3期27-35,共9页
Earthquake Engineering and Engineering Dynamics
基金
"十二五"国家科技支撑计划项目(2012BAK15B05-04)
关键词
芦山地震
非约束砌体结构
约束砌体结构
破坏比
Lushan earthquake
unconfined masonry structure
confined masonry structure
damage rate
