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桥梁静载试验过程中,由于加载效率、加载方式、观测误差等因素的影响而导致的实测挠度偏差,会增加挠度校验系数的不确定性,进而影响到桥梁状态评定。采用建立统一模型的方法,在排除了计算模型不一致所导致的不确定因素后,以在某装配式小箱梁桥上进行的多次加载试验所获得的大量实测挠度数据为基础,结合概率理论,对统一模型下的挠度校验系数分布规律进行了分析,论证了以典型桥跨的荷载试验结果评定桥梁整体状态的合理性。
During the static load test of bridges, the measured deflection caused by the factors such as loading efficiency, loading method and observing error will increase the uncertainty of deflection coefficient and affect the assessment of bridge status. By using the method of establishing a unified model, based on the large amount of measured deflection data obtained from multiple loading tests on a prefabricated box girder bridge after excluding the uncertain factors caused by inconsistencies in the calculation model, combined with probability theory , The distribution rule of deflection calibration coefficient in the unified model is analyzed, and the rationality of evaluating the whole state of the bridge by the load test results of typical bridge span is demonstrated.