现浇预应力连续箱梁人行天桥受力性能分析

Mechanical Performance Analysis of Cast-in-place Prestressed Continuous Box Girder Pedestrian Overpass

随着城市的发展,人车争道的矛盾也逐渐增多,使得交通状况变得拥堵,人行天桥的出现很好的缓和了这一矛盾。但目前大多数人行天桥的设计中,所采用的结构基本为钢结构吊装,采用不规则跨度的现浇预应力混凝土连续箱梁的较少,因此有必要对其受力性能进行分析。本文以某实际工程不规则跨度的现浇预应力混凝土连续箱梁人行天桥为例,通过对其结构荷载进行阐述,采用某有限元软件对其进行分析,以此了解此类型结构的受力和承载能力的特点,并得出相关结论,以期对类似工程提供参考。

With the development of the city,the contradiction between people and vehicles competing for the road has gradually increased,which makes the traffic situation become congested.The appearance of pedestrian bridges has eased this contradiction.However,in the design of most pedestrian bridges at present,the structure used is basically steel structure hoisting,and there are few cast-in-place prestressed concrete continuous box girder with irregular span,so it is necessary to analyze its mechanical performance.In this paper,a concrete-in-situ prestressed concrete continuous box girder pedestrian bridge with irregular span in an actual project is taken as an example,and its structural load is explained,and a finite element software is used to analyze it.In order to understand the characteristics of the force and bearing capacity of this type of structure,and draw relevant conclusions,in order to provide a reference for similar projects.