简谐荷载下单层球面网壳动力失效机理研究  

Failure mechanism of latticed shells subjected to harmonic actions

作　　者：支旭东[1] 范峰沈世钊 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《地震工程与工程振动》2005年第4期76-84,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重点项目(50338010);国家自然科学基金面上项目(50278020)

摘　　要：以具有实际工程意义的40m跨度K8型单层球面网壳为研究对象,采用ANSYS程序的P ipe20单元,考察不同矢跨比网壳在不同频率的简谐荷载作用下,随着荷载幅值的逐渐增大,其宏观和微观响应的变化,详细阐述了2类破坏行为的规律,并通过一定规模的参数分析,给出单层球面网壳动力强度破坏判别准则。Single-layer latticed domes with a span of 40m are studied to reveal macro and micro responses subjected to harmonic actions of increasing amplitude. Pipe20 element in ANSYS program is applied in the research. Different ratios of rise to span and harmonic actions of different frequencies are considered, Regularity of two kinds of failure modes is presented in detail. Dynamic strength failure criterion of single-layer latticed dome is also given by summary of parameter analysis results.

关 键 词：网壳结构 简谐荷载 动力强度破坏 动力失稳 频谱特性 

分 类 号：TU393.3[建筑科学—结构工程]