钢桁架结构静载试验与理论分析

为检测某新建剧院钢桁架结构的承载能力并验证其投入运营后的安全性,对主舞台葡萄架及上方承受荷载较大处的钢桁架下弦檩条及吊杆进行了现场静力荷载试验及理论分析。通过静载试验得到了主要构件截面在各级静力荷载作用下的挠度、应力、应变等数值的变化,并进行了强度和稳定性的验算及最大挠度和最大应力应变的分析。将测试结果、结构的理论计算值与有关规范规定值进行了比较,验证了结构的可靠性。

Static load test and theory analysis of steel truss structure

In order to test the bearing capacity of the steel truss structure of the a newly-built theater and verify its safety after being put into operation,field static load tests and theory analysis were carried out on the grids of the main stage and the purlins and suspenders of the lower chord of the steel truss where the load is relatively high.Through static load test,the changes of deflection,stress,and strain of the main component sections under various static loads are obtained.In addition,the strength and stability are checked and the maximum deflection and maximum stress are analyzed.The reliability of the structure is verified by comparing the test results and the theoretical calculated values of the original structure with the values specified in the relevant codes.