某V撑刚构桥荷载试验研究

Load Test Research on a V-braced Rigid Frame Bridge

荷载试验作为桥梁投入使用前验收的一项重要指标,对桥梁整体性能的评定具有重要的意义,通过外观调查及技术状况评定,掌握桥梁的施工质量情况。通过测试结构主要受力构件在设计荷载作用下的受力性能,掌握桥梁结构的实际工作状况,判断结构受力是否正常及是否满足设计要求。通过桥梁在静载试验荷载下的实际工作状态,判定其承载能力和使用条件。掌握桥梁结构的动力性能。测试结构在动力荷载作用下的振动响应,掌握桥梁结构的主要动力性能指标(主要包括荷载冲击系数、自振特性等参数),从整体上了解结构的工作状态。从而对桥梁承载能力作出综合技术评定。并根据检测结论,提出桥梁养护或维修建议或方案。

Load test,as an important index of acceptance before the bridge is put into use,is of great significance to the evaluation of the overall performance of the bridge.The construction quality of the bridge can be mastered through the appearance investigation and the evaluation of the technical condition.By testing the mechanical performance of the main stress-bearing components of the structure under the design load,the actual working conditions of the bridge structure can be grasped,and whether the stress of the structure is normal and whether it meets the design requirements.Through the actual working state of the bridge under the static load test load,its bearing capacity and service conditions are determined.Master the dynamic performance of bridge structures.Test the vibration response of the structure under the action of dynamic load,master the main dynamic performance indicators of the bridge structure(mainly including parameters such as load impact coefficient,natural vibration characteristics),and understand the working state of the structure as a whole.Thereby a comprehensive technical evaluation of the bridge bearing capacity is made.And based on the test conclusion,put forward bridge maintenance or repair suggestions or plans.