Topic
Earthquake resistant structures
About: Earthquake resistant structures is a research topic. Over the lifetime, 1126 publications have been published within this topic receiving 27467 citations.
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TL;DR: Bidirectional cyclic testing was performed on four half-scale reinforced-concrete rectangular bridge column specimens to examine the need to account for bidirectional seismic loading in design for earthquakes expected in eastern and western regions of North America as mentioned in this paper.
Abstract: Bidirectional cyclic testing was performed on four half-scale reinforced-concrete rectangular bridge column specimens to examine the need to account for bidirectional seismic loading in design for earthquakes expected in eastern and western regions of North America. The prototype structures are common two-span, skewed bridge structures designed according to the seismic provisions of Canadian Standards Association (CSA)-S6-06. The column specimens are 1.2×0.6 m in cross section and 3.0 m tall and assumed to carry a gravity load of 6% Agfc′. Two specimens were designed for Montreal, Quebec, Canada (east site), using 0 and 30% combination rules, resulting in longitudinal steel ratios of 0.41 and 0.57%. Two specimens represented the column part of bridges located in Vancouver, British Columbia, Canada (west site), with longitudinal steel ratios of 0.97 and 1.72% resulting from the application of 0 and 40% combination rules. Site-specific cyclic displacement test protocols were developed from time-history ana...
21 citations
01 Jul 1981
21 citations
TL;DR: In this paper, a comparison of the performances of three different base-isolation systems, the laminated rubber bearing system, the New Zealand system, and the resilient-friction base isolator system, is made under the same set of criteria Conclusions pertaining to the ranges of the applicability of the systems for three earthquake sizes, M 60, 67, and 73, are obtained for a site located in the vicinity of the earthquake source.
Abstract: A comparison of the performances of three different base-isolation systems, the laminated rubber bearing system, the New Zealand system, and the resilient-friction base isolator system, is made under the same set of criteria Conclusions pertaining to the ranges of the applicability of the systems for three earthquake sizes, M 60, 67, and 73, are obtained for a site located in the vicinity of the earthquake source (norminal source-to-site distance=10 km) Two different seismological models of the earthquake source were used in modeling the spectral content of the earthquake input The stochastic response of one-story and five-story base isolated structures is computed The equivalent linearization technique is used to linearize the equations that govern those systems that are nonlinear This study confirms the conclusions reached in previous studies by demonstrating again that friction plays an important role in energy absorption This is the reason for the apparent superior performance of the resilient-friction base isolator system However, more studies are needed to assess the feasibility of this system and to better understand its behavior by testing
21 citations
TL;DR: In this article, a simplified analysis procedure has been developed to consider accidental torsion in building design that is rational and convenient relative to building codes, which is extended and evaluated in this paper against measured accidental Torsion determined from motions of 12 buildings with nominally-symmetric plan.
Abstract: A simplified analysis procedure has been developed to consider accidental torsion in building design that is rational and convenient relative to building codes. This procedure is extended and evaluated in this paper against measured accidental torsion determined from motions of 12 buildings—with nominally-symmetric plan—recorded during Northridge (1994), Loma Prieta (1989), Whittier (1987), and Upland (1990) earthquakes. The selected buildings include structures in reinforced concrete and in steel that cover a wide range of structural systems, including moment resisting frames, shear walls, braced frames, and hybrid systems. After the measured torsion is interpreted and compared to analytical estimates, it is demonstrated that this procedure is sufficiently accurate to be used in design applications.
21 citations