Failure Mechanisms and Progressive Collapse Judgment Criterion of Space Trusses under Strong Earthquakes

Hui Wu; Wen Feng Du; Yi Jun Wang

doi:10.4028/www.scientific.net/AMM.90-93.1581

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 90-93Failure Mechanisms and Progressive Collapse...

Failure Mechanisms and Progressive Collapse Judgment Criterion of Space Trusses under Strong Earthquakes

Abstract:

Aiming at failure mechanisms and judgment criterion of progressive collapse for space trusses, the responses and the failure mechanisms of diagonal square pyramid space trusses, leaning laid pyramid space trusses and orthogonal square pyramid space trusses with circumferential simple supports under different seismic waves were analyzed in this paper. The results show that space trusses have a good performance of earthquake resistance, but progressive collapse occurs easily. Based on the failure mechanisms of space truss, a judgment criterion of space truss is proposed under strong earthquakes, according to the characteristics of energy, displacements and plastic levels of members. The judgment criterion is expressed by judgment coefficient J. When J>6, space trusses tend to be ductile failure, however, When J> 6, space trusses tend to be progressive collapse.

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Periodical:

Applied Mechanics and Materials (Volumes 90-93)

Pages:

1581-1585

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.90-93.1581

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Online since:

September 2011

Authors:

Hui Wu, Wen Feng Du, Yi Jun Wang

Keywords:

Failure Mechanism, Judgment Criterion, Space Trusses, Strong Earthquakes

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