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- Title
Research on Design of Main Cable Saddle System of Self-anchored Suspension Bridge with Elliptical Tower and Space Cable.
- Authors
HUANG Zhen; WANG Zhiping; WANG Xinguo; DENG Zhuozhang; YANG Dewang; LI Anyuan
- Abstract
The main bridge of Wanlong Bridge under construction is the first spatial self anchored suspension bridge with elliptical steel tower in the world. The saddle of this bridge adopts an self-adaptive space cable saddle combined with casting and welding, which has the following technical difficulties: the force of space cable saddle is complex. The longitudinal stiffness of the elliptical tower is large, and the slip resistance of the main cable saddle is prominent. The bottom of the saddle is a flexible support, the cable saddle and the main tower are co-deformed, and the tower-saddle connection structure is complicated in force transmission. In order to master the key technology of the main cable saddle and the tower-saddle connection structure of the self-anchored suspension bridge with elliptical tower and space cable, this paper carries out a systematic study by using numerical analysis method. The research conclusions are as follows: (1) When the bridge is subjected to (dead load+car+crowd+tap water+temperature+wind), the minimum friction coefficient µ that satisfies the requirements is 0.215, and the 12 mm vertical friction plates are required. (2) The maximum Von Mises stress and maximum vertical deformation of the main cable saddle under the condition of maximum cable force are 186.2 MPa and 1.572 mm, which meet the requirements of strength and stiffness. (3) In the structure connecting the main cable saddle and the steel tower, the force of the main cable saddle is transferred to the web of the steel tower in the form of vertical shear force through the supporting baffle. The shear force of the supporting baffle at the end is significantly greater than that of the middle baffle, and the non-uniformity coefficient of shear transfer is 1.29. (4) The support plate of the main cable saddle has a certain angle at the edge of the saddle area. The maximum longitudinal angle under the condition of empty cable is 0.366‰ rad, which should be taken into consideration in the saddle pushing construction.
- Subjects
CABLES; SUSPENSION bridges; MOTOR vehicle springs &; suspension; SKID resistance; TOWERS; SADDLERY; SHEARING force; CABLE structures
- Publication
Railway Standard Design, 2024, Vol 68, Issue 6, p99
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202211090004