Shear strength and stiffness enhancement of cross-stiffened steel plate shear walls

Mohammad Jalilzadeh Afshari,Abazar Asghari,Majid Gholhaki

doi:10.1007/s40091-019-0224-6

Mohammad Jalilzadeh Afshari, Abazar Asghari + Show 1 more

Open Access

https://doi.org/10.1007/s40091-019-0224-6

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Abstract

Nowadays, the use of steel plate shear walls, as an effective seismic resisting system, has been of great interest in enhancing the lateral strength and stiffness of buildings both in renovation and seismic rehabilitation of existing concrete and steel structures. In the present research, the shear strength and stiffness of steel plate shear walls in various configurations of stiffeners, including horizontal, vertical, and horizontal–vertical, were investigated by finite element method and finally semi-empirical relations were presented in this regard. The results indicated that the shear strength and stiffness of stiffened SPSWs were well predicted by the proposed relations, but increasing the number of stiffeners above a certain range will not have a significant effect on enhancing the stiffness and strength.

Highlights

In recent years, extensive experimental investigations have been conducted under cyclic and monotonic loads on steel plate shear walls (SPSWs) to ensure the seismic performance of the system
The results indicated that there is a special upper bound for the number of horizontal and vertical stiffeners in the stiffening process of a specific panel
Addition of stiffeners beyond the allowed value had no significant effect on enhancing the stiffness and strength of the panel, and only increased the weight of the panel and executive problems

Summary

Introduction

Extensive experimental investigations have been conducted under cyclic and monotonic loads on steel plate shear walls (SPSWs) to ensure the seismic performance of the system. Based on finite element model analysis of unstiffened panel, shear strength of the plate was 1425.89 kN, indicating 2.8% error compared to analytical value of 1466.27 kN This demonstrates the proper accuracy of mesh sizes and modeling process. 22.52 6.73a a Values are calculated in relation to the corresponding 3v3h specimen the predicted stiffness values for the four above-mentioned validation models (Table 6) and the corresponding values obtained from finite element analysis indicated an error rate of 3.05, 0.61, 0.39, and 0.55%, respectively, due to applying the proposed Relation (13). The results clearly indicate the high accuracy of the proposed relations regarding the increasing rate in the strength of the stiffened shear panel with the arbitrary number of horizontal or vertical stiffeners

Conclusions

Findings

Compliance with ethical standards