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Your search keyword '"Empirical relationship"' showing total 4 results
Start Over Descriptor "Empirical relationship" Journal journal of earthquake engineering
4 results on '"Empirical relationship"'

1. Simplified Collapse Analysis Model for RC Frames with Cyclic Deterioration Behaviors.

Author

Li, Gang, Yu, Liling, and Dong, Zhiqian

Subjects
*REINFORCED concrete, *ENERGY dissipation, *STEEL framing, *EMPIRICAL research, *REGRESSION analysis
Abstract

Equivalent single-degree-of-freedom (ESDOF) models are widely used to evaluate the collapse capacity of multistory structures, and their rationality is very important because it greatly affects the accuracy of the evaluation results. Prior studies have indicated that obvious cyclic deterioration (CD) behaviors exist before structural collapse, and such deterioration behaviors are the primary sources of collapse for reinforced concrete (RC) frames subjected to long-duration ground motions. Although several ESDOF models have been developed to represent the global mechanical behaviors during the collapse of RC frames, such models cannot reasonably consider CD behaviors. This paper establishes an ESDOF model capable of considering CD behaviors by utilizing the Ibarra-Krawinkler (I-K) model. The ESDOF model includes a monotonic backbone curve with a negative tangent stiffness and a hysteretic rule to consider CD behaviors based on hysteretic energy dissipation. A simple method utilizing the empirical relationship between the monotonic ductility capacity and hysteretic energy dissipation capacity of RC columns to determine the hysteretic energy dissipation capacity of the ESDOF model is proposed. The CD behaviors are simulated by calculating the hysteretic energy dissipation capacity of the ESDOF model using the empirical relationship, which is obtained by the regression analysis of the existing experimental data of the RC column tests. The proposed ESDOF model is validated by pseudo-static collapse experiments and collapse fragility analyses. The results demonstrate that CD behaviors cannot be ignored when performing the collapse analyses of RC frames and that the proposed ESDOF model can adequately predict the collapse capacity of RC frames. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Simplified Collapse Analysis Model for RC Frames with Cyclic Deterioration Behaviors

Author

Liling Yu, Gang Li, and Zhiqian Dong

Subjects
021110 strategic, defence & security studies, business.industry, 0211 other engineering and technologies, Collapse (topology), 020101 civil engineering, Rationality, 02 engineering and technology, Building and Construction, Structural engineering, Rc frames, Geotechnical Engineering and Engineering Geology, 0201 civil engineering, Empirical relationship, business, Civil and Structural Engineering, Mathematics
Abstract

Equivalent single-degree-of-freedom (ESDOF) models are widely used to evaluate the collapse capacity of multistory structures, and their rationality is very important because it greatly affects the...

Published
2019

3. Inelastic Displacement Response of RC Systems with Cyclic Deterioration—An Energy Approach

Author

Bora Acun, M. Altug Erberik, and Halûk Sucuoğlu

Subjects
Ground motion, business.industry, Structural system, Building and Construction, Structural engineering, Geotechnical Engineering and Engineering Geology, Displacement (vector), Hysteresis, Stiffness degradation, Empirical relationship, business, Short duration, Energy (signal processing), Civil and Structural Engineering
Abstract

Inelastic displacements of reinforced concrete systems are investigated by employing an energy-based approach. A hysteresis model is developed that accounts for stiffness degradation, strength deterioration and pinching. The model is calibrated by using experimental data from literature. Inelastic displacement ratios are calculated under a specific set of ground motion records with long effective durations. The results reveal the importance of deteriorating behavior under long duration excitations, especially for short and medium period structures. The last part of the study is devoted to the introduction of a simple empirical relationship for estimating the inelastic displacement demands of degrading RC structural systems.

Published
2012

4. Estimation of the Fundamental Vibration Period of Existing RC Buildings in Turkey Utilizing Ambient Vibration Records

Author

Kadir Güler, Ercan Yüksel, and Ali Koçak

Subjects
Engineering, business.industry, Structural system, Building and Construction, Structural engineering, Geotechnical Engineering and Engineering Geology, Reinforced concrete, Vibration, Infill, Ambient vibration, Empirical relationship, business, Constant (mathematics), Civil and Structural Engineering
Abstract

Earthquake design codes generally provide empirical formulae or various approximations for determining fundamental periods of buildings for the evaluation of statically equivalent seismic forces. It is thus important to use realistic periods for the design and performance assessment of existing buildings. This study deals with the evaluation of fundamental vibration periods of reinforced concrete (RC) buildings having a frame-type structural system, and considers the effects of infill walls. The problem is evaluated by utilizing experimental and analytical approaches. A height-dependent relationship to estimate the fundamental period of vibration of Turkish RC moment-resisting frames is derived for a fully elastic condition. Furthermore, a constant parameter is defined to magnify the empirical relationship in order to attain code-specified periods obtained by considering moderate-intensity earthquakes.

Published
2008

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