文档介绍：
整桥尺度下多跨矮塔斜拉桥主梁内力优化
设计#
任远,黄侨,李西芝*
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(东南大学桥梁工程研究所,南京 210096)
摘要:矮塔斜拉桥具有常规斜拉桥形式,结构受力等方面介于连续梁桥与常规斜拉桥之间,
其斜拉索对主梁起加劲作用,在总体抗力中只起部分作用,利用率不高。本文将常规斜拉桥
的斜拉桥索力优化弯矩能量最小法与影响矩阵相结合方法应用于矮塔斜拉桥上,通过斜拉索
索力调整优化,建立索力优化模型,调整主梁与斜拉索承担荷载比例,合理提高斜拉索利用
率,从而实现了矮塔斜拉桥主梁内力的优化,改善主梁正负弯矩分布,使得主梁受力更加合
理。
关键词:矮塔斜拉桥;主梁内力;索力优化
中图分类号:U448
The whole bridge scale multi-span extradosed cable-stayed
bridge internal force optimization design
REN Yuan, HUANG Qiao, LI Xizhi
(Institute of Bridge Engineering, Southeast University, NanJing 210096)
Abstract: The extradosed cable-stayed bridge with a conventional cable-stayed bridge, structural
force between a continuous girder bridge with conventional cable-stayed bridge, the cable-stayed
girder stiffening effect on play, in the overall resistance of only part of the job, the utilization rate
is not high. In this paper, the conventional cable-stayed bridge cable force optimization bending
energy minimization method and influence matrix method applied to bination of low
tower cable-stayed bridge, the cable force optimization, optimization of cable force adjustment
model establishment, girder and cable bearing ratio, reasonable raise cable-stayed cable utilization,
thereby realization of low tower cable-stayed bridge internal force optimization, improvement of
positive and negative bending moment distribution of the girder, g