Design of Three-Pylon Cable-Stayed Bridge with a Main Span over 1 000 m for Maanshan Changjiang River Rail-cum-Road Bridge

被引：0
|
作者：
Zhang Q. [1 ]
Liu H. [1 ]
Wang D. [1 ]
Yang C. [1 ]
Luo K. [1 ]
机构：
[1] China Railway Major Bridge Reconnaissance and - Design Institute Co.Ltd., Wuhan
来源：
Bridge Construction | 2023年 / 53卷
关键词：
bridge design; elastic cable; large-diameter pile; parallel-steel-wire stay cable; rail-cum-road bridge; steel truss; steel-concrete composite pylon; three-pylon cable-stayed bridge;
D O I：
10.20051/j.issn.1003-4722.2023.S2.003
中图分类号：
学科分类号：
摘要：
The main navigation channel bridge of Maanshan Changjiang River Rail-cum-Road Bridge is a three-pylon cable-stayed bridge with a main-span length over 1 000 m. Studies were carried out focusing on the span arrangements, bridge type selection, composition of restraint system and configuration of main components, to meet the requirements of high construction standards and allow the bridge to have sound heavy-load carrying and spanning capacity. The finally selected option was a three-pylon cable-stayed bridge with spans (11 2 + 392 + 2 X 1 120 + 392 + 112) m, featuring the restrain system consisting of elastic cables at the central pylon and dampers at the side pylons. The superstructure consists of two N-shaped transversely steel trusses that act compositely with the orthotropic steel panels to form the upper deck, and the steel box beams to form the lower deck. The pylons are steel-concrete composite structures supported by foundations with 4 m-diameter bored piles. The central pylon, which is 25 m higher than the two side pylons, are a spatial A-shaped structure with four legs, while the side pylons are A-shaped structures from the side view, but 1-shaped structures from the elevation view. The auxiliary and side piers are portal-framed piers, supported by foundations of 2. 5 m-diameter bored piles. The stay cables are composed of parallel, high-strength, low-relaxation, Zn-Al alloy coated steel wires of 7 mm diameter and with a nominal tensile strength of 2 100 MPa. © 2023 Wuhan Bridge Research Institute. All rights reserved.
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页码：16 / 21
页数：5
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