|Table of Contents|

Seismic Behavior of Cold-formed Steel Framing Walls with Strengthened Steel Strips in Screw Holes(PDF)

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

Issue:
2021年03期
Page:
43-52
Research Field:
Publishing date:

Info

Title:
Seismic Behavior of Cold-formed Steel Framing Walls with Strengthened Steel Strips in Screw Holes
Author(s):
YUAN Tao-tao1;  SUI Lu2;  WU Han-heng2;  XU Cong-cong2
(1. China Railway First Survey and Design Institute Group Co.,Ltd., Xi'an 710043, Shaanxi, China; 2. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)
Keywords:
cold-formed steel framing wall;  strengthened steel strip;  seismic behavior;  low cyclic loading test;  screw hole
PACS:
TU392.5
DOI:
10.19815/j.jace.2020.07001
Abstract:
In order to study the impact of strengthened steel strips in screw holes on seismic behavior of cold-formed steel(CFS)framing walls, three full scale specimens of CFS framing walls were tested subjected to low cyclic loads. The influence of the strengthening form on the failure mode, lateral stiffness, bearing capacity, ductility and energy dissipation performance of CFS framing walls was analyzed. The finite element software OpenSEES was used for the numerical analysis of the wall. The results show that the failure mode of the cold-formed steel framing walls with strengthened steel strips in screw holes is still screw connection failure and sheathing seam slip. The steel strip can strengthen the screw connection of the cladding panel, so as to improve the lateral stiffness and shear capacity of the composite wall. Compared with the specimen without steel strip reinforcement in screw hole(HS-140-A), the shear capacity of the strengthened specimens(HS-140-B, HS-140-C)is improved by 32.5% and 58.1%, and their lateral stiffness is increased by 31.7% and 59.3%. The energy dissipation capacity of the specimens was significantly improved after enhancement of screw holes by the steel strips. The ductility coefficients of the three specimens are greater than 8, which shows good deformation ability. The finite element models can represent the effect of screw connections nonlinear behaviour on hysteretic performance of the walls. The relative error between the finite element analysis results and the experimental data is controlled within 10%, and the model has good accuracy.

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Last Update: 2021-05-20