摘要
甬江左线特大桥主桥为我国首座铁路混合梁斜拉桥,索塔采用钻石型,全高177.91 m。施工过程中,索塔下塔柱及中塔柱均处于长悬臂、大角度倾斜状态,若不采取适当措施,会导致索塔截面出现不良应力,并出现较大偏位,严重影响索塔后期施工及外观质量。为控制索塔在施工过程中的受力状态,建立施工阶段有限元模型,对索塔施工全过程进行模拟分析,提出一种"拉杆-撑杆"优化设计方法,对类似工程设计与施工具有一定的指导意义。
The Yong Jiang Left-Line Bridge is the first railway hybrid girder cable-stayed bridge in China with the diamond cable tower 177. 91m high. During the construction, the lower tower column and the middle tower column tend to be in the state of long cantilever and large tilt. If appropriate measures are not taken, adverse stress may appear in cable tower section with big deviation, affecting seriously late tower construction and visual quality. To control the stress of cable tower during construction, Finite element model of construction is established to simulate and analyze the entire construction process of the cable tower, an optimal design of “tension-supporting rod” is proposed, which provides references for design and construction of similar works.
出处
《铁道标准设计》
北大核心
2015年第4期49-52,57,共5页
Railway Standard Design
基金
中国铁路总公司科技研发重点项目(2013G001-D)
