摘要
就提速改造之前的海南西环线8座桥梁的9孔梁进行了动载试验。采用列车通过桥梁时,梁体跨中动挠度、梁体跨中竖向振动与梁体跨中和桥墩墩顶横向振动、梁体跨中横向振动加速度、支座竖向动位移和横向动位移测试,确定桥梁结构的动力系数、振动特征、裂缝状态,用以评定结构在动载作用下的工作状态确定桥梁的可靠性。通过相关关系分析,揭示桥梁结构动力学特性差异的原因。
Dynamic load tests were carried out to 9-span beams of 8 bridges of west circle line in Hainan before the acceleration transformation.When train was passing through the bridges,the dynamic deflection,vertical vibration and transverse vibration acceleration of beam span centre,transverse vibration of beam span centre and pier＇s top,vertical dynamic displacement and transverse dynamic displacement were obtained.Dynamic modulus,vibration characteristics and crack condition of the bridges designed to validate working condition of structure under dynamic load so as to ascertain reliability of bridges were determined.In addition,reasons of being different in dynamic characteristics of bridges were revealed through analysis of correlative relation.
出处
《铁道科学与工程学报》
CAS
CSCD
2010年第3期37-43,共7页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(50808178)
关键词
动载试验
可靠性
动力学特性
dynamic load test
reliability
dynamic characteristics
