建筑结构学报2017，Vol.38Issue(12)：49-56,8.DOI:10.14006/j.jzjgxb.2017.12.006
地震作用下钢筋混凝土框架结构倒塌全过程振动台试验研究
Shaking table test on complete collapse process of RC frame structure subjected to earthquake
摘要
Abstract
A specimen constructed at one-five scale,whose prototype structure is a RC frame destroyed seriously at the first floor under Yushu earthquake,is used to research the complete process of the typical lateral increment collapse modes like domino and failure mechanism of RC frame structures located at high seismic intensity region induced by Wenchuan and Yushu earthquakes.Through the shaking table test,the experimental findings indicate that the complete collapse process can be divided into two parts,that is,horizontal increment collapse and vertically progressive collapse.The specimen is in a boundary collapse state when the inter-story drift at the first floor reaches 1/ 19.In process of collapse,the comer column named C3 loses its vertical load carrying capacity at first where the progressively vertical collapse begins to occur.The lateral displacements of columns at the first floor are constantly increased under the combination of gravity load and ground motion,causing columns named B2,B3 and C2 next to C1 to fail subsequently.After these,the damaged specimen has a deficient redundancy,and thus a wide range of vertical collapse occurs which finally results in laterally progressive story-by-story collapse.Through the investigation of collapsed ruins,the damaged state of "strong beam weak column" for the specimen is in accordance with the earthquake damage investigation results.In the end,the living space for people to survive is discussed,and the suggestions to resist this typical collapse are also recommended.关键词
RC框架结构/振动台试验/倒塌全过程/侧向增量倒塌/竖向连续倒塌/生存空间Key words
RC frame structure/shaking table test/complete collapse process/horizontal increment collapse/progressively vertical collapse/living space分类
建筑与水利引用本文复制引用
骆欢,杜轲,孙景江,许卫晓,丁宝荣..地震作用下钢筋混凝土框架结构倒塌全过程振动台试验研究[J].建筑结构学报,2017,38(12):49-56,8.基金项目
中国地震局工程力学研究所基本科研业务费专项(2016B04,2016A05),国家自然科学基金青年基金项目(51408563). （2016B04,2016A05）
