外倾式多跨矮塔斜拉桥方案设计和受力研究

Scheme Design and Stress Research of Outer-inclined Multi-span Low-pylon Cable-stayed Bridge

摘要:

矮塔斜拉桥是一种介于连续梁桥和斜拉桥之间的新型桥梁结构，兼具这两种桥型的受力特点；而倾斜索面既提高了结构的抗扭特性，也优化了桥梁的景观效果。湍河大桥位于河南省南阳市内乡县，连接内乡主干路迎宾路，跨径布置为50 m+80 m+80 m+50 m，考虑城市景观方面的要求，采用外倾式矮塔斜拉桥方案。通过介绍和分析内乡县湍河大桥，对外倾式多跨矮塔斜拉桥的结构方案设计和受力特性展开研究，对比了桥塔竖直以及外倾角度对结构受力的影响，为类似工程的设计提供借鉴。

Abstract:

The low-pylon cable-stayed bridge is a new bridge structure between the continuous beam bridge and the cable-stayed bridge, and has the stress characteristics of these two bridges. The inclined cable plane not only improves the torsional characteristics of the structure, but also optimizes the landscape effect of the bridge. The Tuan River Bridge is located in Neixiang County, Nanyang City, Henan Province, which connects the arterial road Yingbin Road in Neixiang County. The span layout is 50 m+80 m+80 m+50 m. Considering the requirements of urban landscape, an outer-inclined low-pylon cable-stayed bridge scheme is adopted. Based on the introduction and analysis of Tuan River Bridge in Neixiang County, the research is conducted on the structural scheme and stress performance of outer-inclined multi-span low-pylon cable-stayed bridge. The influence of the vertical and outward leaning angles of the bridge pylon on the structural stress is compared, which can provide references for the design of similar projects.