【摘要】 以四川汉源县龙潭沟1号桥为例,介绍了上承式钢筋混凝土空腹箱型无铰拱桥的受力特点和相关设计参数的选用;采用三维空间程序对该桥进行了计算,验证了该结构的抗震性能和稳定性。提出了用军用梁施工拱肋的施工方案,并进行了详细的计算。该方案通过调节下弦杆长度能较好地拟合拱肋悬链线,并可通过横向增减梁片来适应拱肋宽度和拱架施工期间的内力要求。更多还原

【Abstract】 Based on Longtangou Bridge in Sichuan province,the determination of different mechanical characteristics and design parameters of reinforced concrete deck hollow box hingeless arch bridge were described in this paper.A three dimensional FE program was employed to calculate the stability and seismic performance of this bridge.Military construction method was proposed and the detailed structure characteristics related to this method was carefully studied.There are two outstanding advantages in this method,firstly,through modifying the length of the link chord the rib centenary profile could be better adjusted;secondly,by the measure of adding or reducing the beam panel the different internal force during the whole construction phase can be dealt with.更多还原