摘要
针对爆破地震作用下建筑结构的安全评估问题,提出利用时程分析方法全面评估爆破地震波的安全度;建立了基于精细积分算法的结构弹塑性动力分析架构模式,编制了建筑结构爆破地震反应弹塑性精细时程分析程序;通过算例验证了该算法的准确性与高效性,弹性时程分析与不同恢复力模型弹塑性时程分析的结果曲线具有类似特征和数值差异;建议选择合理的恢复力模型,使用弹塑性时程分析方法模拟爆破地震作用下结构的动力响应,全面评估爆破地震波的安全性。
According to safety assessment of structures subjected to blasting-induced ground excitations, a time-history analysis method was proposed to assess safety of blast seismic waves. The model of structural elasto-plastic dynamic analysis based on precise integration algorithm was established. The precise integration codes of blast seismic structural elasto-plastic responses were programmed and the precision of algorithm was validated. Comparisons of calculted results with elastic and elasto-plastic analysis show that their displacement curves are similar but numerical results are different. The appropriate restoring force model and elasto-plastic analysis are suggested to be used to simulate structural dynamic response to blasting-induced ground excitations and assess blasting seism waves.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2008年第1期92-96,共5页
Explosion and Shock Waves
关键词
爆炸力学
弹塑性分析
精细积分
建筑结构
爆破地震
mechanics of explosion
elasto-plastic analysis
precise integration method
structure
blast seism
