Damage scenarios-based topological vulnerability analysis of truss structures

被引：1
|
作者：
Yu G. [1 ]
Sun L. [1 ]
机构：
[1] State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2010年 / 38卷 / 04期
关键词：
Damage scenario; Local mechanism; Mechanism determination; Redundancy; Topological vulnerability;
D O I：
10.3969/j.issn.0253-374x.2010.04.002
中图分类号：
学科分类号：
摘要：
Structural vulnerability analysis is becoming one of efficient theoretical methods to improve structural design and increase structural safety. Structural topological vulnerability analysis can reveal the inherent structural weakness which is irrelevant to the external load by focusing on the internal factor of structural vulnerability. The matrix analysis method is used to study the structure geometrical stability which is a measurement of structural performance. A 2D and 3D truss structures are used to study the effectiveness of the allocation of redundant components in structures, as well as the impact extent of different vulnerable scenarios to structural performance. It is found that the reasonable allocation of the redundant components may limit the vulnerable scenario to a relatively small region, whereas blindly increasing component redundancy may not serve any purpose to reduce the structural vulnerability; furthermore, due to the existence of local mechanisms, the event impact to the structural system is different for various vulnerable scenarios. With the help of topological vulnerability analysis, measures can be taken to reduce the structural vulnerability.
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页码：475 / 480+499
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