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在交通枢纽工程中,箱涵可满足公路桥梁和过水的双重需求。虽然箱涵结构形式简单,但其承受荷载种类繁多,荷载之间往往相互关联,这些因素都增加了箱涵内力计算及配筋的复杂度。本文基于箱涵构件最不利内力,应用平面刚桁架模型计算箱涵内力,建立箱涵结构内力影响线及包络图,依据最不利荷载布置,将移动车辆荷载简化为几种静力状态的荷载作用,对上海天山路箱涵工程作了计算分析。
In the transportation hub project, the box culvert can meet the dual needs of highway bridges and over water. Although the box culvert structure is simple in form, it has a wide range of loads and often interrelated loads. All of these factors increase the calculation of internal forces of box culverts and the complexity of reinforcement. In this paper, based on the most unfavorable internal forces of box culvert components, the internal force of box culverts is calculated by the plane rigid frame truss model, and the influence lines and envelope diagrams of internal forces of box culverts are established. According to the most unfavorable load layout, the load of moving vehicles is reduced to several kinds of static load Role, the Tianshan Road in Shanghai box culvert made a calculation analysis.