大跨空间网壳结构动力特性研究
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摘要
大跨空间网壳结构在地震荷载作用下的振动反应规律不仅与地震荷载有关,还与结构自振特性紧密相关,分析结构的自振特性是进行结构抗震分析的基础。大跨空间网壳结构的自振特性比较复杂且影响因素多,通过探讨大跨空间网壳结构的基本自振特性、各阶周期、对应振型结构及各向刚度分布情况,把握结构的基本自振特性;随后主要对结构周期随支座的数量、矢跨比和载荷等三个主要因素的影响进行参数分析,得出他们之间频率和振型的异同,从而得出一些有益于结构设计的结论。
The seismic response property of long span space reticulate shells is correlative with the earthquake load and the self vibration characteristic,which is the basic of aseismic analysis.The self vibration characteristic is comprehensive and the effect factors are more for long span space reticulate shells,the self vibration characteristic is grasped by discussing the period,the shape of vibration and the rigidity distribution.The effect of the main parameters on the self vibration characteristic is considered which are the amount of the support,the ratio of height and span and the load.Some conclusions are gained.
The seismic response property of long span space reticulate shells is correlative with the earthquake load and the self vibration characteristic,which is the basic of aseismic analysis.The self vibration characteristic is comprehensive and the effect factors are more for long span space reticulate shells,the self vibration characteristic is grasped by discussing the period,the shape of vibration and the rigidity distribution.The effect of the main parameters on the self vibration characteristic is considered which are the amount of the support,the ratio of height and span and the load.Some conclusions are gained.
引文
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