000011317 001__ 11317
000011317 005__ 20141205155858.0
000011317 04107 $$aeng
000011317 046__ $$k2008-10-12
000011317 100__ $$aPeloso, Simone
000011317 24500 $$aSecant Modes Superposition: A Simplified Method for Seismic Assessment of RC Frames

000011317 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011317 260__ $$b
000011317 506__ $$arestricted
000011317 520__ $$2eng$$aDealing with seismic demands at life safety and collapse prevention limit states implies the necessity of explicitly considering the nonlinear behavior of structures. The nonlinear time-history analysis is the most rigorous procedure to compute the inelastic seismic demand, unfortunately this method is still too complex for widespread professional use. Therefore, the use of nonlinear static procedures (NSP) is going to be favored by the engineering practice. A simplified nonlinear assessment procedure, named Secant Modes Superposition (SMS) method, is presented herein focusing on bi-dimensional frames. The quantities of interest (floor displacements, inter-storey drifts and storey shears) are derived from the combination of the modal contributions as the modal response spectrum method does in the linear case. An iterative procedure is used to define the stiffness of an equivalent linear system and the spectral modification coefficients accounting for the hysteretic energy dissipation. Some response indices are used to check convergence of the method assuring the compatibility between the quantities called into play. Comparing the seismic response of some plane frames as estimated by nonlinear dynamic analyses and by using the SMS method, the simplified procedure seems to be able to reasonably assess their nonlinear behavior. Additionally, the plastic hinge distribution is obtained from the iterative procedure: an useful tool to locate potential local collapse mechanisms. Worth to mention is the extremely reduced computational effort.

000011317 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011317 653__ $$aframe analysis, simplified assessment procedure, equivalent linear structure, secant stiffness, equivalent system damping.

000011317 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011317 720__ $$aPeloso, Simone$$iPavese, Alberto
000011317 8560_ $$ffischerc@itam.cas.cz
000011317 8564_ $$s230798$$uhttps://invenio.itam.cas.cz/record/11317/files/05-01-0254.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0254.
000011317 962__ $$r9324
000011317 980__ $$aPAPER