120m下承式简支钢桁架桥设计分析  

Design and Analysis of 120m Through Simply Supported Steel Truss Bridge

作　　者：曹骏驹 CAO Junju(Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing 210004,China)

机构地区：[1]江苏省交通工程建设局,南京210004

出　　处：《现代交通技术》2020年第6期57-60,共4页Modern Transportation Technology

摘　　要：以新安京杭运河大桥主桥120 m下承式简支钢桁架桥施工设计为例,设计中对主桥构造尺寸拟定(包含桁架高度、节间长度、斜杆倾角、主桁间距、各杆件及节点板厚度等),通过midas Civil软件进行结构验算,发现原设计中部分杆件强度应力储备不足,通过深度分析,优化了构造尺寸。结果表明:钢桁架各构件强度、整体稳定性、杆件稳定性、刚度和疲劳验算均满足规范要求,结构设计经济、耐久、安全可靠。Taking the construction drawing design of 120 m through simply supported steel truss of the main bridge of Xin'an Beijing-Hangzhou Grand Canal Bridge as an example.In the design,the structural dimensions of the main bridge are determined(truss height,section length,inclined bar inclination,main truss spacing,the thickness of each member and gusset plate,etc.).Through midas Civil structural checking calculation,it is found that the strength stress reserve of some members in the original design is insufficient.Through depth analysis,the structural size is optimized.The results show that the strength,stability,overall stability,stiffness and fatigue of each member of the steel truss meet the requirements of the code,and the structural design is economical,durable,safe and reliable.

关 键 词：简支钢桁架 结构分析 疲劳验算 结构安全 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]