摘要
针对温度作用对车辐式索桁架结构影响的问题,以设计的跨度为6 m的车辐式索桁架结构为对象,进行了车辐式索桁架结构拉索的温度响应试验,得出温度作用对上环索和上径向索的预应力影响最为明显,定义稳定索为温度敏感性构件.基于可靠性理论,运用响应面法和蒙特卡洛法,得到不同温度影响下车辐式索桁架结构在位移限值控制下的可靠度指标及其变化趋势和不同结构参数对结构的灵敏度,温度影响下下径向索施加的预应力和活荷载为灵敏度最大的结构参数.
To solve the problem of influence of temperature on the spoke cable-truss structure,a designed cable-truss structure with a span of six meters as the object,an experiment on temperature response was conducted.According to the experimental results,the effect of temperature on the pretress of the upper and upper radial cables is most obvious,and the stability cable is defined as the temperature sensitive component.Based on the reliability theory,the reliability index and its changing trend under the displacement limit control were obtained,and the sensitivity of different structural parameters to the structure was obtained by the response surface method and Monte Carlo method.Prestress exerted by the lower radial cable,and live load were parameters with the maximum sensitivity.
作者
刘占省
王竞超
韩泽斌
薛素铎
王泽强
张维廉
LIU Zhansheng;WANG Jingchao;HAN Zebin;XUE Suduo;WANG Zeqiang;ZHANG Weilian(College of Civil Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Building Construction Research Institute Co.,Ltd.,Beijing 100036,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2020年第5期500-507,共8页
Journal of Beijing University of Technology
基金
北京市科学技术委员会科技新星计划资助项目(Z14110601814085)
住房和城乡建设部科学技术计划资助项目(2016-R2-043)。
关键词
车辐式索桁架
温度响应
静力试验
敏感性构件
可靠性评估
预应力
spoke cable-truss
temperature response
static test
sensitive component
reliability assessment
prestress
