基于多次检定试验的铁路钢桁梁桥技术状态变迁研究  

Research on Technical Status Transition of Railway Steel Truss Bridge Based on Multiple Verification Tests

作　　者：王江胜 苏力 WANG Jiangsheng;SU Li(Dazhun Railway Branch,China Energy Xinshuo Railway Co.Ltd.,Ordos Inner Mongolia 010300,China;Railway Engineering Research Institute,China Academy of Railway Sciences Group Corporation Limited,Beijing 100081,China)

机构地区：[1]国能新朔铁路有限责任公司大准铁路分公司,内蒙古鄂尔多斯010300 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2023年第4期47-51,共5页Railway Engineering

基　　金：中国铁道科学研究院集团有限公司基金(2022YJ174)。

摘　　要：大准(大同—准格尔)下行线黄河特大桥主桥为(96+132+96)m连续钢桁梁柔性拱结构,该桥自1992年成桥以来经历了4次桥梁检定,历次检定均开展了静载、脉动、行车试验。本文对历次检定试验中桥梁主桁挠度、杆件应力、桥梁自振特性、桥梁运营性能等关键指标的测试结果进行梳理,对桥梁实际工作状态、安全承载能力的变迁情况进行分析。结果表明,桥梁经过近30年的服役后,尽管线路运营状态发生了较大变化,而且4次检定试验时采用的加载列车形式、测试内容都不尽相同,但关键测试指标均表明桥梁受力状态良好,桥梁整体性能和技术状态与成桥时相近。The main bridge of the Datong-Jungar Banner downline Yellow River grand bridge is a(96+132+96)m continuous bridge with flexible arch.Since its completion in 1992,the bridge has undergone four bridge verifications,all of which have undergone static load,pulsation,and driving tests.This paper summarized the test results of key indicators such as bridge main truss deflection,member stress,bridge natural vibration characteristics,and bridge operational performance in previous verification tests,and analyzed the transition in the actual working state and safety bearing capacity of the bridge.The results show that after nearly 30 years of service,although the operational status of the bridge has undergone significant changes,and the loading train form and testing content used in the four verification tests are different,the key test indicators all indicate that the bridge is in good stress state,and the overall performance and technical status of the bridge are similar to those of the completed bridge.

关 键 词：铁路桥梁 连续钢桁梁柔性拱 现场试验 静动力特性 桥梁检定 

分 类 号：U448.13[建筑科学—桥梁与隧道工程]