超净高钢桁架栈桥原位静载试验  

The Situ Static Load Test of Super-Clear-Height Steel Truss Trestle

作　　者：江强[1] 凌影 刘有军[1] 邱斌[1] 张海军 JIANG Qiang;LING Ying;LIU Youjun;QIU Bin;ZHANG Haijun(Yunnan Institute of Building Research,Kunming Yunnan 650223,China;Baoshan City Construction Quality and Safety Supervision Station,Baoshan Yunnan 678000,China)

机构地区：[1]云南省建筑科学研究院,云南昆明650223 [2]保山市建设工程质量安全监督站,云南保山678000

出　　处：《工程质量》2020年第6期90-94,共5页Construction Quality

基　　金：云南省科技创新平台建设,云南省既有建筑结构安全性评价关键技术应用研究及工程示范(2013DC010)。

摘　　要：为钢桁架栈桥后期能够安全运行并验证其承载能力,选择钢桁架栈桥的一榀桁架进行静载试验。静载试验中,采用非接触式测量的方法解决了超净高桁架挠度不易测量的问题。通过试验结果与有限元分析结果表明,钢桁架在试验荷载作用下能够保持弹性工作状态,且有较大的承载能力富余。另外,该试验的非接触式测量方法能够推广到其他的类似工程。In order to ensure the safety operation of the steel truss trestle and verify its bearing capacity,one truss of the steel truss trestle was selected for the static load test.In the static load test,the non-contact measurement method is adopted to solve the problem that the deflection of the superscalar-height truss is difficult to measure.The test results and the finite element analysis results show that the steel truss can maintain the elastic working state under the test load,and has a large excess bearing capacity.In addition,the non-contact measurement method of this experiment can be extended to other similar projects.

关 键 词：钢桁架栈桥 静载试验 非接触测量 有限元分析 

分 类 号：U446[建筑科学—桥梁与隧道工程]