000018849 001__ 18849
000018849 005__ 20170118182244.0
000018849 04107 $$aeng
000018849 046__ $$k2017-01-09
000018849 100__ $$aValenzuela-Beltran, Federico
000018849 24500 $$aReliability-Based Design Spectra Modification Factor for Reinforcement of Tilted Structures

000018849 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018849 260__ $$b
000018849 506__ $$arestricted
000018849 520__ $$2eng$$aA reliability-based methodology to estimate the additional strength required for the reinforcement of existing tilted structures, is proposed. Several nonlinear time history analyses of structural systems with different levels of asymmetric yielding are carried out. The seismic analyses consider the effect of two orthogonal components of the seismic ground motions as well as the influence of soil-structure interaction. Results indicate that the annual rate of exceedance of the ductility demand for asymmetric yielding structures may be much higher than those corresponding to symmetric structures, such increment depends on several factors: tilting angle, ductility demand of the structure, and ratio between the vibration period of the system and that of the soil. Based on the results, a simplified mathematical expression to estimate strength amplification factors of tilted structures to achieve a similar reliability to that of symmetric structures, is proposed. The expression depends on the tilt angle, the ductility of the structure, and the ratio of the fundamental vibration period of the structure to the dominant period of the soil. Finally, the proposed expression is compared with that recommended by the Mexico City Building Code, and its advantages and disadvantages are discussed.

000018849 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018849 653__ $$areliability assessment; asymmetric yielding; tilted structures; seismic analysis

000018849 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018849 720__ $$aValenzuela-Beltran, Federico$$iRuiz, Sonia E.$$iReyes-Salazar, Alfredo$$iBojorquez, Eden
000018849 8560_ $$ffischerc@itam.cas.cz
000018849 8564_ $$s671626$$uhttps://invenio.itam.cas.cz/record/18849/files/2345.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2345.
000018849 962__ $$r16048
000018849 980__ $$aPAPER