Collapse modes and anti-collapse measures for long span trusses under multi-dimensional earthquakes

被引：2

作者：

Huang, Xinghuai ^{[1
]}

Xu, Zhaodong ^{[1
]}

Yang, Mingfei ^{[1
,2
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China

[2] School of Civil Engineering, Anhui University of Science and Technology, Huainan 232001, China

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2012年 / 42卷 / 01期

关键词：

Bearings (structural) - Earthquakes - Finite element method - Nonmetallic bearings - Rubber;

D O I：

10.3969/j.issn.1001-0505.2012.01.021

中图分类号：

学科分类号：

摘要：

In order to study the collapse mode and find measures to prevent structural collapse of long span trusses, the explicit finite element analysis was performed to calculate the whole collapse process. From the collapse process, the structural collapse mode can be obtained. The collapse mode of the trusses under horizontal earthquake are mainly referred to strength failure, while the collapse mode of the trusses under vertical earthquake are mainly referred to dynamic instability. Three different space trusses subjected to multi-dimensional earthquake were compared, including a normal truss, and a truss with normal rubber bearing, and a truss with multi-dimensional earthquake isolation and mitigation devices (MEIMD). The normal truss collapsed after 5.12 s, and the truss with normal rubber bearing did not collapse but there was a 1.01 m subsidence at the middle point. However, the truss with MEIMD had little damage. It can be concluded that the MEIMD can enhance the anti-collapse performance under severe earthquakes.

引用

页码：109 / 113