Development of a new computational method based on truss elements to investigate the nonlinear static behavior of steel shear walls

Document Type : Original Article

Authors

1 Ph.D. candidate, dept. of Civil engineering, Kermanshah branch, Islamic Azad University, Kermanshah, Iran

2 Assistant Professor, dept. civil engineering, Islamic Azad University, Kermanshah, Iran

3 Assistant Professor, dept. of Civil engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

4 Assistant professor, dept. of civil engineering, Eslamabad-E-Gharb Branch, Islamic Azad University, Eslamabad-E-Gharb,Iran.

Abstract

Investigation of the nonlinear behavior of SPSWs requires complex non-linear finite element analyses. These analyses have some drawbacks namely convergence problems, time-consuming, and the need for expertise. Therefore, it is necessary to propose a comprehensive method that can solve the problems of current methods. In this research, a novel approach based on the use of axial members to evaluate the nonlinear behavior of SPSWs with any arbitrary configuration is developed. The innovation of the proposed method is that the obstacles in modeling of shear walls with different shapes and aspect ratios have been solved. Moreover, due to the low computational cost of this method, i.e., a 60% reduction in modeling time, and a saving of 92% and 66% in analysis time in static and cyclic loading, respectively, full-scale structures can be analyzed with acceptable accuracy. In addition, owing to its comprehensiveness, this method can be placed in existing commercial software, or it is possible to be developed as software. To evaluate the efficiency of the proposed method, 4 different SPSWs with different mechanical and geometric characteristics were analyzed using the proposed method. The results showed a good agreement between the outputs of the proposed method and the actual behavior of the SPSW, which verifies the suitable performance of the method. The results of analysis using the proposed method indicated that the maximum shear stress ratio occurs at the lower H/L and thickness. In addition, increasing the thickness and H/L of the infill results in an increase in the shear that can be tolerated by the section as well as a reduction in the stress ratio. The average of reduction for an increase in thickness and H/L is 61.8% and 72 %, respectively.

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Main Subjects


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