The load combination is complex with consideration of the effect of asymmetry distribution of live load, snow accumulation and horizontal seismic load.

且考虑了屋面活载不均匀效应、雪压堆积效应和水平地震作用的影响，荷载组合复杂。

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Reliability index is influenced by the variance of basic parameters, resistance distribution, and ratio of live load to dead load.

可靠指标与极限状态方程中的各基本变量的变异性、抗力的概型分布、以及活荷恒荷效应比有关。

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Based on the universal finite element analysis software ANSYS, a spatial model of the bridge is built and the stress distribution under the live load on main sections is analyzed.

利用大型通用软件ANSYS建立结构空间有限元分析模型，分析活载作用下各控制截面的应力分布规律。

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