Restoring Force Model and Seismic Performance Improvement of CFST Column-Double Laminated Slab Composite Shear Walls

ZHOU Guangxin; ZHANG Fengliang; WU Bian; LIU Yang

doi:10.3724/j.gyjzG26031504

Volume 56 Issue 5

May 2026

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ZHOU Guangxin, ZHANG Fengliang, WU Bian, LIU Yang. Restoring Force Model and Seismic Performance Improvement of CFST Column-Double Laminated Slab Composite Shear Walls[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(5): 99-112. doi: 10.3724/j.gyjzG26031504

Citation:

ZHOU Guangxin, ZHANG Fengliang, WU Bian, LIU Yang. Restoring Force Model and Seismic Performance Improvement of CFST Column-Double Laminated Slab Composite Shear Walls[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(5): 99-112. doi: 10.3724/j.gyjzG26031504

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Restoring Force Model and Seismic Performance Improvement of CFST Column-Double Laminated Slab Composite Shear Walls

doi: 10.3724/j.gyjzG26031504

1. Sichuan Institute of Building Research Co., Ltd., Chengdu 610036, China;
2. School of Intelligent Civil and Ocean Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China;
3. Department of Civil Engineering, Sichuan University of Architectural Technology, Deyang 618000, China;
4. Construction Engineering Company of China Railway No. 5 Engineering Group Co., Ltd., Guiyang 550081, China

Received Date: 2026-03-15
Available Online: 2026-06-06
Publish Date: 2026-05-20

Abstract

Abstract

The concrete-filled steel tubular （CFST） column-double laminated slab composite shear wall is a novel composite structural form for prefabricated buildings. A refined three-dimensional finite element model was established using ABAQUS and validated against quasi-static test data. Combined with test and numerical results， the mechanical mechanism under quasi-static loading was revealed， and the shear slip at the precast-cast-in-situ concrete interface was identified as the intrinsic cause of composite action degradation and performance deterioration. On this basis， a trilinear backbone curve model applicable to composite shear walls with a shear span ratio greater than 1.5 was proposed， along with formulas for equivalent stiffness and cross-sectional bearing capacity. Hysteretic rules were established based on a modified Clough model to develop a complete restoring force model. Validation results showed that the theoretical predictions agreed well with the test （numerical） results. Furthermore， an interface strengthening scheme using angle steel shear keys was proposed， which increased the ultimate drift ratio by 34% and the ductility coefficient by 26%， significantly improving the plastic deformation capacity.
- composite shear wall,
- concrete-filled steel tube,
- double laminated slab,
- restoring force model,
- seismic performance,
- finite element analysis

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References(34)

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