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In-plane Stability of Cable-arches with Horizontal Restraining Spring at Foot of Arch(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年02期
Page:
100-108
Research Field:
Publishing date:

Info

Title:
In-plane Stability of Cable-arches with Horizontal Restraining Spring at Foot of Arch
Author(s):
WANG Hai-shan1;  CHEA Pumsakheyna2;  LI Jing-yuan2;  GUO Yan-lin2
(1. Zhejiang Zhongnan Construction Group Steel Structure Co., Ltd., Hangzhou 310052, Zhejiang, China; 2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China)
Keywords:
horizontal restraining spring of arch foot;  elastic flexibility coefficient;  spoke arch;  in-plane stability performance;  ultimate bearing capacity
PACS:
TU973.2
DOI:
10.19815/j.jace.2019.08057
Abstract:
In practical engineering, the horizontal displacement would occur due to the insufficient rigidity of the horizontal restraint at the feet of the non-grounded arch subjected to the vertical load. In the view of the problem that horizontal displacement at the arch feet would significantly change the mechanical performance and load-carrying capacity of the arch, the finite element model of the conventional arch and the spoke arch with the horizontal restraining spring at the arch foot was established by using ANSYS finite element software. The full span distributed vertical load and half span distributed vertical load were discussed in the numerical analyzing. The first-order and the inelastic analysis were carried out to investigate the influence of the spring stiffness amplitude on the mechanical properties of the conventional arch and the spoke arch, including the changes of the horizontal thrust and displacement of the arch foot, the changes of the internal force along the axis of the arch and the in-plane stability performance. The results show that cables in the spoke arch can significantly reduce the horizontal displacement and the horizontal thrust of the arch feet, significantly improve the overall stiffness and the load-carrying efficiency over the conventional arch. Moreover, cables in the spoke arch can significantly limit the influence of the decrease in the spring stiffness amplitude on the internal forces and the stability performance of the spoke arch. These conclusions provide fundamentals for the strength design of the spoke arches and the supporting components of the arch feet.

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Last Update: 2020-04-21