论文部分内容阅读
在现浇混凝土连续箱梁桥结构中,横梁在保证桥梁横向刚度、协调不同箱室共同受力等方面发挥着重要的作用。特别是在城市立交桥中,由于地面道路及地下管线的影响,桥墩的布设受到限制,从而造成桥墩间距过大,横梁加长而梁高受限,给设计分析带来困难。横梁计算中,荷载模式的选取非常重要,特别是恒载传递模式的选取,对横梁内力计算结果影响很大,尤其对预应力混凝土横梁的设计影响更大,稍有不慎就会造成结构开裂,甚至出现安全事故。采用空间数值分析法对箱梁桥的支点横梁受力状况进行详尽地分析比较并结合实际算例,得出桥梁横梁的建议计算方法,可供桥梁设计计算时参考。
In the cast-in-place concrete continuous box girder bridge structure, the transverse girder plays an important role in ensuring the lateral rigidity of the bridge and coordinating the joint forces in different cabins. Especially in the urban overpass, due to the influence of the road on the ground and the underground pipeline, the pier layout is limited, resulting in too much spacing between the piers, longer beams and higher beam height, which brings difficulties to the design and analysis. Beam calculation, the load mode selection is very important, especially the selection of the dead load transfer mode, the beam internal force calculation results have a great influence, especially for the design of prestressed concrete beams greater impact, a slight carelessness will result in structural cracking , Or even a security incident. The space numerical analysis method is used to analyze and compare the mechanical behavior of the beam of the box girder bridge fulcrum fully. The calculation method of the beam of the bridge is given and can be used as a reference for calculation of the bridge design.