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.
出处
《地震工程与工程振动》
CSCD
北大核心
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)
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
lattice shell
harmonic action
dynamic strength failure
dynamic unstability
frequency characteristic
