Improving seismic behaviour of steel plate shear walls with and without cut-outs

Maleki, Ahmad (2012) Improving seismic behaviour of steel plate shear walls with and without cut-outs. (PhD thesis), Kingston University, .


In this work experimental and numerical investigations were conducted on seismic behaviour of steel plate shear wall systems (SPSW) with and without cut-outs. Medium-scale specimens with moment-resisting connections between beam and columns and specific edge connections for fish plates were designed and constructed. The specimens were subjected to the cyclic quasi-static load. A loading system and proper lateral bracing unit was designed and built to apply the loading history according to ATC-24 protocol. Nonlinear finite element analysis models with dynamic formulation were developed to analyse test specimens. The results were validated with available published test results from other researchers. After validation, the model was used for estimating the maximum load required for testing of specimens. The efficiency of the method was finally proved by comparing the pushover and hysteresis analysis results with tests carried out in Kingston University's lab. The test series comprised frame-only, steel plate shear wall with two different types of steel plate and corresponding specimens with circular cut-outs in the steel plates, GFRP-steel Sandwich Shear Walls (GSSW) with different GFRP lay-up, GSSW with cut-outs and finally the steel plate shear wall with cut-out and optimally designed steel stiffeners, The specification of boundary members and the type of connections was kept unchanged in all specimens. The effectiveness of utilising the GFRP plies and steel stiffeners for improving the seismic performance of steel plate shear walls with and without cut-outs was explored. The effectiveness of these methods for enhancing the initial stiffness and ultimate load capacity of specimens with no noticeable requirements for increasing flexural stiffness for columns was verified.

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