【摘要】 为评估某大型渡槽钢筋混凝土空腹桁架拱结构的现役状态,提出了一套简易可行不停止运营的检测方法,检测了其混凝土强度、钢筋锈蚀、混凝土碳化等,并在不同工况下进行了荷载试验及相应应变、挠度等测试.在检测结果基础上,进一步运用大型通用有限元计算分析技术,对该跨桁架拱结构的现役状态及初始设计状态分别进行了数值模拟分析.检测及分析结果表明,混凝土强度符合设计要求,构件仍在弹性工作阶段,结构的承载能力可基本满足工程运营的要求.更多还原

【Abstract】 In order to assess the current condition of a RC arched vierendal truss of an existing aqueduct,concrete strength,reinforcement corrosion and concrete carbonization are tested.The load tests are also done and the corresponding strain and deflection under different load conditions are measured.Furthermore,based on the test results,the refined finite element analyses are conducted on the current state and original design state,respectively.Test and simulation results indicate that the concrete strength satisfies the design requirement and the structural members are still in the elastic range.Basically load-carrying capacity of the structure can satisfy the requirement for future operation.更多还原