钢管桁架拱结构极限承载力及其影响因素分析

Analysis of Influencing Factors of Load Bearing Capacity for Steel Tube Truss-Arch

利用已有的桁架结构承载力试验结果,验证了本文极限承载力有限元计算程序的正确性。在此基础上,采用实际工程中常用的圆钢管倒三角形桁架拱为标准模型,探讨了高跨比、宽高比、立面腹杆尺寸及荷载分布对结构承载力的影响,可为该类结构设计提供参考。

The test results of a truss structure were employed to verify that the finite element program for the ultimate bearing capacity calculation is right.Based on this work,one kind of circular steel tube truss-arch with inverted triangle cross-section which is used in the actual engineering widely is taken as a standard model.The effects of rise-span ratio,width-height ratio,web-member dimension and load distribution are discussed.These conclusions can provide some reference for the design of steel tube truss-arch structures.