在役梁拱组合体系景观桥梁荷载试验分析

Load Test Analysis of In-Service Beam-Arch Composite System Landscape Bridge

为了研究在役梁拱组合体系景观桥梁的承载能力,选取主拱跨中、腹孔主梁跨中和拱肋根部三个截面进行测试,基于三种不同工况进行试验。通过静载试验测得桥梁结构的微应变和挠度,通过脉动试验分析桥梁的振动特性。试验结果表明:桥梁结构的强度、刚度和整体刚度都满足使用要求。试验分析结果可作为桥梁状况评价的依据,也为同类桥梁荷载试验在测试截面选取、测点布设、加载试验、脉动试验等方面提供参考。

In order to study the bearing capacity of the in-service beam-arch composite system landscape bridge,three sections were selected for testing,namely the mid-span of the main arch,the mid-span of the web hole main beam,and the root of the arch rib.The tests were conducted based on three different working conditions.The micro-strain and deflection of the bridge structure were measured through static load test,and the vibration characteristics of the bridge were analyzed through pulsation test.The test results show that the strength,stiffness,and overall stiffness of the bridge structure meet the usage requirements.The analysis results of the tests can be used as the basis for the evaluation of bridge condition,and also provide reference for the load tests of similar bridges in the selection of test sections,layout of measuring points,loading tests,and pulsation tests.