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钢筋混凝土桁架拱桥(简称桁架拱桥)自问世以来,在全国各地已广泛采用。其受力合理、用料省、施工期短等优点愈来愈明显,计算理论也日臻完善,在中等跨径桥梁方案设计中有一定的竞争力。1980年,交通部公路规划设计院等单位还编制了《公路桥梁设计图——钢筋混凝土桁架拱梁(JT/GQS—019—80》(简称设计图),为设计部门与工程单位技术人号提供了方便。我们在参考设计图进行桁架拱桥设计的过程中,感到下列问题有进一步探讨的必要,现谈谈肤浅的看法,供有关部门设计时参考。
Reinforced concrete truss arch bridge (referred to as truss arch bridge) since its inception, has been widely adopted throughout the country. Its force is reasonable, the materials used, the construction period is short and so the advantages are more obvious, the calculation theory is also getting better, in the medium-span bridge program design has a certain competitiveness. In 1980, the Ministry of Communications Highway Planning and Design Institute and other units also prepared a “road bridge design - reinforced concrete truss arch (JT / GQS-019-80” (referred to as the design), for the design department and engineering unit technical people Provided the convenience of our reference to the design of truss arch bridge design process, I feel the following issues to further explore the need now to talk about the superficial view for the relevant departments to design reference.