拟静态挠度法评定梁式桥承载力  

Quasi-static deflection method for detecting loading capacity of beam bridge

作　　者：王凌波[1] 胡大琳[1] 蒋培文[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2010年第4期51-55,81,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200731881232)

摘　　要：为探索快速有效的桥梁普查新方法,分析了传统的承载能力评定准则,通过承载能力基本理论和动力学与静力学的有机结合,提出用动态车辆挠度曲线取代静态挠度影响线的荷载试验改良模式——拟静态挠度法,评定中小跨径梁式桥的现有承载能力,并进行了实桥的试验对比验证。结果表明:拟静态快速检测方法测试结果达到原荷载试验结果精度的90%以上,可采用修正系数,偏安全地对中小跨径梁桥承载力进行评估;在满足检测精度的同时,可减少30%左右的经济损耗。In order to explore a new survey method to evaluate bridges quickly and effectively,through the analysis of standards in the bearing capacity,combining the bearing capacity basic theory with dynamics and statics,this paper proposed a load test improved model named quasi-static deflection method to evaluate existing loading capacity for small and medium-sized bridges.This method was verified by an actual bridge.The results show that the quasi-static deflection method can achieve the accuracy more than 90%,which could be used for middle and small span bridges bearing capacity evaluation by correcting coefficient.Under meeting the demand of detection accuracy,this method can reduce economic loss by 30%.3 tabs,15 figs,7 refs.

关 键 词：桥梁工程 梁桥 承载力 拟静态挠度法 快速检测 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]