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小半径曲线箱式连续梁桥力学特征比等跨径直桥复杂很多,能够引起梁体发生侧移影响因素并不单一,所占比重也不同,确定各影响因素的权重十分必要。本文应用Midas/Civil软件对此类桥型进行有限元模拟,对造成侧移各因素影响敏感性分析,通过层次分析法(AHP)准确计算出影响该桥型侧向移动各因素的权重值。通过分析得出众影响因素中系统升温对侧移影响最大。利用层次分析法可以提高评价结果信度,有效淡化人为因素影响,具有直观简洁的特点,能直接应用到该桥型侧向移动各影响因素评价当中。
The mechanical characteristics of the small radius curve box continuous girder bridge are much more complex than those of the equivalent span bridge. The factors that can cause the sideways displacement of the beam body are not single, their proportions are also different. It is necessary to determine the weight of each influencing factor. In this paper, the Midas / Civil software is used to simulate the type of bridge. The sensitivities of the factors affecting the lateral displacement are analyzed. The weight values of each factor affecting the lateral displacement of the bridge are calculated accurately by Analytic Hierarchy Process (AHP). From the analysis, we can conclude that system warming has the most influence on the side shift in influencing factors. The analytic hierarchy process (AHP) can improve the reliability of evaluation results, effectively dilute the influence of human factors, and has the characteristics of being intuitive and concise, which can be directly applied to the evaluation of various influencing factors of lateral movement of the bridge type.