铁道标准设计2017，Vol.61Issue(5)：65-69,5.DOI:10.13238/j.issn.1004-2954.2017.05.015
郑万铁路上跨郑西客专联络线特大桥主桥转体结构分析
Analysis of the Rotary Structure of the Extra-long Bridge Crossing-over Zhengzhou-Xian Railway Line on Zhengzhou-Wanzhou Dedicated Passenger Tie-Line
贾宝红1
作者信息
- 1. 郑万铁路客运专线河南有限责任公司,郑州 450003
- 折叠
摘要
Abstract
The bridge on Zhengzhou-Wanzhou dedicated passenger tie-line crossing-over Zhengzhou-Xian line is a single pylon cable-stayed bridge with a main span of 138m and is the longest railway curved cable-stayed swing bridge.The bridge located on a 1400m curve line is equipped with the largest lateral eccentricity spherical hinge (SH) in China, and its reliability and stability are of great importance to ensure the construction safety.The paper analyzes the stress distribution of the SH during the rotation construction based on the Midas FEA program.The effect of prestressed tendons on the mechanical property of the SH is also analyzed.Results indicate that: (1) the entire rotation structure is subject to a low stress with only some local stress concentration, which can be solved by some structural measures;(2) the tensile stress in some local areas can be greatly reduced by prestressed tendons so that safety rotation construction can be ensured;(3) the setting of eccentric displacement enables the application of rotation construction on the long-span small-curved cable-stayed bridge, thus, the additional weight on the deck and the swivel weight is greatly reduced.The above results may provide references for the construction of similar bridges.关键词
铁路桥/独塔斜拉桥/转体施工/横向偏心球铰/有限元Key words
Railway bridge/Single pylon cable-stayed bridge/Rotation construction/Lateral eccentricity spherical hinge/Finite element分类
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贾宝红..郑万铁路上跨郑西客专联络线特大桥主桥转体结构分析[J].铁道标准设计,2017,61(5):65-69,5.
