EXPERIMENTAL INVESTIGATION INTO RESIDUAL DISPLACEMENTS DUE TO INELASTIC TORSIONAL RESPONSE
Recent numerical studies into the residual deformation response of structures with in-plan asymmetry have shown that in some cases, such irregularities can lead to significantly different behaviour from equivalent symmetric, or 2-dimensional in-plane structures. In order to verify these findings, a series of dynamic shaketable tests using a simple 3-dimensional frame model capable of exhibiting stiffness, strength or mass eccentricity have been carried out. A summary of the test setup and procedure is provided here, along with some selected results that highlight important aspects of the observed behaviour. The experimental findings demonstrate that residual deformations can be larger on one side of a structure due to the effects of torsional response. However it is seen that the side exhibiting the larger maximum transient displacement, may not necessarily have a correspondingly larger permanent displacement. Finally, as a reference to mitigating permanent deformations through explicit design measures, results are presented for tests using materials with different amounts of strain-hardening and therefore exhibiting different system post-yield stiffness. The experimental results demonstrate that increasing the postyield stiffness ratio reduces residual drifts in the model structure.
Shake-table experiment inelastic torsion residual displacements residual mitigation performance-based design
Didier Pettinga Stefano Pampanin Constantin Christopoulos Athol Carr Rolando Castillo
Glotman Simpson Consulting Engineers, 1661 West 5th Avenue, Vancouver,(BC) V6J 1N5, Canada. Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch,New Zealan Department of Civil Engineering, University of Toronto, 35 St. George Street, Toronto,(ON) M5S 1A4, Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch,New Zealan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）