试比较公路和铁路桥梁的作用组合方式有什么不同？ -题库考试答案搜索网

试比较公路和铁路桥梁的作用组合方式有什么不同？

问答题

2022-04-02 22:03

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正确答案

公路桥梁设计中作用（荷载）分为永久作用、可变作用和偶然作用。公路桥梁设计中作用的组合分为多种类型。如考虑承载能力极限状态下的基本组合与偶然组合，考虑正常使用极限状态下的长期组合、短期组合、应力计算组合等。组合时，需要考虑不同作用的分项系数与组合系数。
铁路桥梁设计中作用（荷载）分为主力（包括恒载和活载）、附加力、特殊荷载。铁路桥梁设计中的荷载组合方式主要为三种：（1）主力组合：恒载＋活载；（2）附加力组合：恒载＋活载＋附加力；（3）特殊荷载组合：恒载＋活载＋特殊荷载。在组合中，铁路荷载效应的组合是各项荷载效应的直接叠加，不考虑荷载的组合系数和分项系数。

试题解析

标签：东北林业大学土木工程专升本桥梁工程期末考试

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