横梁与系杆"丁"字型接头空间应力分析

结合一座正在建设的三跨连续中承式系杆钢桁拱桥的“丁”字型接头,对比了不同结构形式接头的构造。并以某一在建桥梁的“丁”字型接头为例,介绍了进行有限元局部分析时的两步分析法的优点及具体思路,采用大型通用工程软件用两步分析法计算分析了“丁”字型接头的局部应力分布特征及其传力特性,对该接头的结构构造及其细节的合理性作出了分析和综合评价。结果表明:该接头结构构造合理,受力状态安全,其结构构造可被借鉴应用于类似桥梁的工程设计中。

Stress analysis of joint in transversal beam and tied bar

Combined with a three-span continuous semi-supported and tied steel truss arch-bridge,structures of different joints were discussed.And taking bridge as an example,the advantages and idiographic way of two-step analysis method in local finite element analysis were under construction introduced.Local stress distribution of the joint was studied with the two-step analysis method.And the rationality of the structure was appraised.The analysis results show that the structure of the joint is reasonable,the stress state is safe.and the structure can be used in similar bridge's design.