|Table of Contents|

Experiment on Seismic Behavior of Cold-formed Thin-walled Steel Walls with Diagonal Braces(PDF)

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

Issue:
2019年02期
Page:
30-38
Research Field:
Publishing date:

Info

Title:
Experiment on Seismic Behavior of Cold-formed Thin-walled Steel Walls with Diagonal Braces
Author(s):
WANG Yu-hang1; 2;  DENG Rui1; 2;  YAO Xin-mei3;  ZOU Yu-xuan3;  SHI Yu1; 2
(1. Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing 400045, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)
Keywords:
cold-formed thin-walled steel wall;  diagonal brace;  seismic performance;  screw spacing;  ductility;  energy dissipation
PACS:
TU392.1
DOI:
-
Abstract:
In order to study the seismic behavior of cold-formed thin-walled steel walls with diagonal braces, horizontal low cyclic loading tests for four full scale models of cold-formed thin-walled steel walls were conducted. The effects of diagonal bracing, screw spacing and chord stud bearing capacity on the seismic performance of the walls were investigated. The failure process and main failure characteristics of all specimens were described, and the hysteresis curves, skeleton curves, lateral stiffness degradation and energy dissipation capacity were discussed. The results show that the arrangement of diagonal bracings result in an effective improvement of the load bearing capacity, stiffness, and energy dissipation capacity of walls. However, the diagonal braces increase the lateral performance limitedly, because the connection between the diagonal brace and the transverse brace is weak and the buckling of transverse braces occurs early. As a results, strengthening the joint construction can improve the lateral performance of wall furtherly. For the wall panel with a peripheral screw spacing of 50 mm compared with that of 100 mm, the load-bearing capacity, stiffness and energy dissipation of the wall are improved obviously, but the ductility is decreased. In the case that the wall panel with a peripheral screw spacing of 50 mm and the chord stud is strengthened, the ductility and energy dissipation decrease significantly. The integrity of the wall panel has a great impact on the lateral performance of the wall. In order to prevent the brittle failure, it is necessary to strengthen or change the splicing manner of the panel splicing while reducing the screw spacing.

References:

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Last Update: 2019-03-27