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工程力学  2014 

冲击荷载下网壳结构的失效模式及其动力响应特性

DOI: 10.6052/j.issn.1000-4750.2012.12.0950, PP. 180-189

Keywords: 网壳结构,冲击,失效模式,动力响应,倒塌

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Abstract:

为系统全面确定网壳结构的冲击失效模式,通过大量的参数计算研究网壳结构(包括Kiewitt-8型球面网壳、短程线型球面网壳、肋环斜杆型球面网壳、柱壳)的冲击响应特性,并以Kiewitt-8型单层球面网壳为例,总结分析网壳结构冲击失效的4个典型算例,详述各类失效模式下网壳结构冲击失效的全过程及其荷载作用、结构特征响应、能量传递与转化特点;然后依据不同冲击荷载下网壳的冲击失效特点,定义了网壳结构的3类失效模式(结构局部凹陷、结构整体倒塌、结构冲切破坏)。为揭示网壳结构的冲击失效机理并提出防护建议做了基础性工作。

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