武汉阳逻长江大桥施工猫道设计与验算

Wuhan Yangluo Yangtze River Bridge Catwalk Design and Checking Computations

扼要介绍了武汉阳逻长江大桥施工猫道的设计,采用ANSYS的LINK10与BEAM4单元计算了猫道这一柔性空间索桁结构在空索状态及成形状态的线形。在静力验算时,猫道中间标高处等效静阵风风速取为50.4m/s,由于主要承重结构钢丝绳弹性模量为索力的函数,本文参考国内多座桥梁施工猫道钢丝绳弹模实测值取用1.30×105MPa,按5种工况8种状态验算了猫道的静风稳定性验算。

In this paper, design of the catwalk of Wuhan Yangluo Yangtze River Bridge was introduced to the point. The cable shapes of this catwalk, a typical flexible spacial cable truss structure, under both cable finished stage and completion stage were calculated using LINK10 and BEAM4 elements to simulate the structure in ANSYS. The equivalent static gust wind speed at the mid-elevation proposed to be 50.4 meters per second. The elastic modulus of the steel wire strand of the main bearing structure varied with the strand＇ s tensile. In terms of few domestic bridges, it was assumed to be 1.30 × 105MPa in this paper. The static wind-resistant stability checking computations were conducted in 5 load cases and 8 stages.