【作者】 施洲； 蒲黔辉； 马继兵；

【Author】 SHI zhou PU Qian-hui Ma Jibin (School of civil engineering,Southwest Jiaotong University,Chengdu 610031,China)

【机构】 西南交通大学土木工程学院；

【摘要】 分析通行桥梁的随机行车车辆荷载特性。研究连续梁桥在随机行车荷载下桥梁动力响应,即振动加速度时程、振动位移时程、应变时程等及其最值与振动幅值。分析动力测点的布置方法以及相应仪器设备的选用。将桥梁动力测试结果用于桥梁性能评定,根据实测动力响应的各类量值来分析桥梁结构的动力受力性能。在性能评定中采用假设检验理论,根据相距一段时间前后两次的测试结果的对比分析用于评判桥梁结构是否发生损伤以及损伤的程度。并以广东佛开高速九江大桥为工程背景,介绍该桥在与之十分邻近且有临时构件连接的国道325九江大桥被船撞垮塌前后的两次动力测试结果,以及动力测试结果在桥梁评定中的具体应用。更多还原

【Abstract】 The feature of random passing traffic loads on bridges was analyzed.The dynamic responses such as dynamic acceleration,displacement and strain as well as their maximum and minimum values and amplitude values of continuous beam bridge under random traffic loads were analyzed.The design of dynamic testing points and uses of testing equipments were discussed.The dynamic testing results were used in performance assessment.The values of all kinds of tested dynamic responses were used in assessment of structure resistance.And during the performance assessment,the hypothesis test theory was used in judging whether the damage happened and the extension of the damages based on twice testing data. Then took the example of Jiujiang Bridge on Fokai Highway that is near and linked by temporary structure with the Jiujiang bridge on No.325 national road which was collapsed by boat striking,introducing the application of dynamic results before and after the collapse in bridge performance assessment.更多还原