基于静载试验的某简支板桥状态评定

Condition Assessment of Simply Supported Plate Bridge Based on Static Load Test

某简支板桥的建成时间较长,出现了较多病害。为了桥梁运营安全及为该桥的后期运营或改造提供依据,对其进行静载试验检测,确定桥梁的静力性能,从而评定其现有承载能力及状态。结果表明,在正常使用状态下,该桥承载能力满足规范要求,且各板刚度良好,满足正常使用要求,但其实际横向刚度稍弱,呈现出明显的"单梁受力"现象,从而导致对称加载时,实际挠度明显不对称。

One simply supported plate bridge has turned up many diseases for its long time service.In order to keep the operational security of bridge and to provide the basis for the post-operation or transformation,its static load test is done to determine the static properties of the bridge to assess its current carrying capacity and the state.The results show that the bridge in the normal use of its carrying capacity meets regulatory requirements,and the well stiffness of the plate also meets the normal requirements.But its lateral stiffness is weak and shows a distinct phenomenon of single-beam force,leading to the actual deflection obvious asymmetry in loading symmetrical load.