000018532 001__ 18532
000018532 005__ 20170118182227.0
000018532 04107 $$aeng
000018532 046__ $$k2017-01-09
000018532 100__ $$aAshri, Abdelrahman
000018532 24500 $$aAssessment of Seismic Design Coefficients for Different Structural Systems of Buildings

000018532 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018532 260__ $$b
000018532 506__ $$arestricted
000018532 520__ $$2eng$$aThe verification of the approaches and coefficients used for the seismic design of the diverse structural systems of multi-story buildings represents a priority, particularly with the unprecedented escalation in the number of buildings in earthquake-prone regions. The seismic design modification factors of modern multi-story buildings with three different structural systems are verified in this paper using a systematic assessment approach. Ten reference structures of low, medium and high-rise buildings are selected to represent the contemporary building inventory in metropolitan areas. The selected structures are reinforced concrete (RC) buildings of 2, 8, 18, 26, 40, 50, 56, 66, 80 and 100-story. The benchmark buildings have six various layouts and three different lateral force resisting systems, namely flat slab-columns (FSC), shear walls (SW) and tube in tube (TIT) structural systems. The ten reference buildings are fully designed and detailed according to the latest U.S. building codes. The seismic design response parameters, namely overstrength (Ω), force reduction (R) and deflection amplification (Cd) factors, are estimated through a large number of inelastic pushover analyses (IPAs) and dynamic time history analyses (THAs) using detailed fiber-based analytical models and a large set of earthquake records. The effective stiffness of different structural systems is also compared with the code recommended values and realistic stiffness values are proposed for design to reflect the anticipated cracking at the life safety performance level. The large inelastic analysis results obtained from the seismic assessment of ten multi-story buildings at different performance levels up to collapse reflect the urgent need to decrease the design Ω factor by 10% and increase the Cd factor by 10% for the low-rise FSC system. For the SW and TIT systems, the R factor can be safely increased by 10% to arrive at more cost effective design, with the potential of increasing it further after a thorough assessment of the proposed changes in seismic loads.

000018532 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018532 653__ $$aseismic design coefficients; modern RC buildings; structural systems;  inelastic dynamic analysis; effective stiffness

000018532 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018532 720__ $$aAshri, Abdelrahman$$iMwafy, Aman
000018532 8560_ $$ffischerc@itam.cas.cz
000018532 8564_ $$s1469689$$uhttps://invenio.itam.cas.cz/record/18532/files/166.pdf$$yOriginal version of the author's contribution as presented on USB, paper 166.
000018532 962__ $$r16048
000018532 980__ $$aPAPER