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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01 Jan 1977
TL;DR: In this article, the authors discuss the chief aspects of seismic risk evaluation and earthquake resistant design; evaluate various alternative design techniques; give guidance on topics where no generally accepted method is currently available; and suggest procedures to be adopted in earthquake regions having no official zoning or lateral force regulations.
Abstract: The principal objectives of the book are: (1) to discuss the chief aspects of seismic risk evaluation and earthquake resistant design; (2) to evaluate various alternative design techniques; (3) to give guidance on topics where no generally accepted method is currently available; (4) to suggest procedures to be adopted in earthquake regions having no official zoning or lateral force regulations; (5) to indicate the more important specialist literature. The general principles given apply to the whole range of building construction and civil engineering; the more detailed sections relate more to the structural than to the heavy civil engineering industry. Each stage of the design process is discussed in some detail. Consideration has been given to soils, foundations, superstructure and non-structure. Specifications for construction materials are discussed. In an appendix the earthquake resistance of specific structures such as bridges, chimneys and towers, low-rise commercial-industrial buildings and low-rise housing are discussed. /TRRL/
27 citations
TL;DR: In this article, the authors explore the use of energy concepts in the analysis of base-isolated structures subject to severe earthquake ground motions and demonstrate that improvements in objective (2) often need to be balanced against increases in input energy.
Abstract: This paper explores the use of energy concepts in the analysis of base-isolated structures subject to severe earthquake ground motions. We formulate the energy balance equations in moving- and fixed-base coordinate frames and provide new physical insight into the time-dependent behavior of individual terms. Conventional wisdom in earthquake engineering circles is that systems with base isolation devices should be economically competitive and designed to: (1) minimize input energy, and (2) maximize the percentage of input energy dissipated by damping and inelastic mechanisms. Through the nonlinear time-history analysis of a base-isolated mass-spring system subject to an ensemble of severe ground motion inputs, we demonstrate that improvements in objective (2) often need to be balanced against increases in input energy. Hence, by itself, objective (1) presents an overly simplified view of desirable behavior.
27 citations
TL;DR: In this article, a parametric study of the response of bridges supported by an isolation system consisting of sliding Teflon bearings and displacement control devices is presented. But the results are limited to two-span continuous deck bridges.
Abstract: This paper reports on a parametric study of the response of bridges supported by an isolation system consisting of sliding Teflon bearings and displacement control devices. The isolated bridges are subjected to simulated earthquake motions which are compatible with CalTrans design spectra. The effects of isolation system properties, deck flexibility, pier flexibility, pier strength, distribution of isolation elements and earthquake type are investigated. Results are presented in a form that is useful in the design of sliding isolation systems for two‐span continuous deck bridges. Comparisons with the response of conventionally built bridges demonstrate the significant benefits of seismic isolation. Finally, simplified code‐type analysis procedures are presented and evaluated.
27 citations
TL;DR: In this article, the deteriorated plastic hinge properties of the neutralized reinforced concrete (RC) bridge column and performed the pushover analysis to obtain the decayed seismic capacity curves were determined and the possible seismic loss can be expressed as a function of service time.
Abstract: The neutralisation (carbonation) of concrete usually results in material deterioration of a reinforced concrete (RC) bridge, so that the seismic capacity of the structure tends to degrade over time. This paper determined the deteriorated plastic hinge properties of the neutralised RC bridge column and performed the pushover analysis to obtain the decayed seismic capacity curves. As a result, the time-dependent fragility curves with respect to some representative damage levels can be established and the possible seismic loss can be expressed as a function of service time. The S-surfaces representing retrofitting cost versus service time for a neutralised RC bridge subjected to different earthquake levels were determined quantitatively in a case study. Throughout the whole life-cycle of a bridge, critical service times corresponding to dramatically increased slopes in the S-surface associated with cost elevations can be identified to assist in the development of a financially optimised strategy for timely seismic retrofitting.
27 citations
TL;DR: In this article, the authors analyzed the non-linear seismic response of reinforced concrete slit shear walls under earthquake excitation and showed that yielding of the connecting beams can significantly reduce the deflection response of the slit-shear wall structure and the seismic loading induced on it.
27 citations