The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Hyunhoon Choi - One of the best experts on this subject based on the ideXlab platform.
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displacement based design of supplemental dampers for seismic retrofit of a Framed Structure
Journal of Structural Engineering-asce, 2006Co-Authors: Jinkoo Kim, Hyunhoon ChoiAbstract:The procedure of direct displacement-based design (DBD), presented in the SEOAC Blue Book, was modified to evaluate the seismic performance of existing Structures. Then an optimum number of velocity-dependent supplemental dampers, such as viscous and viscoelastic dampers, required to reduce the seismic response of existing Structures to a given performance limit state was evaluated. The proposed method was applied to seismic performance evaluation and performance-based seismic retrofit of ten- and 20-story steel frames, and the final design was verified by time history analyses using artificial earthquake records generated based on the design spectrum. According to the analysis results, the performance points evaluated by the proposed method match well with those computed by time-history analyses, and the maximum displacements of the model Structures retrofitted by the supplemental dampers corresponded well to the given target values.
Laurent Daudeville - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis on seismic resistance of a two story timber Framed Structure with stone and earth infill
International Journal of Architectural Heritage, 2019Co-Authors: E Fritsch, Yannick Sieffert, H Algusab, Stephane Grange, Philippe Garnier, Laurent DaudevilleAbstract:ABSTRACTDue to their seismic resistance, traditional timber-Framed Structures with masonry infill suffered little damage during recent earthquakes. Moreover, timber-Framed Structures can be built w...
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full field measurement with a digital image correlation analysis of a shake table test on a timber Framed Structure filled with stones and earth
Engineering Structures, 2016Co-Authors: Yannick Sieffert, Stephane Grange, Philippe Garnier, Laurent Daudeville, Florent Vieuxchampagne, Jeancharles DucciniAbstract:This paper aims at presenting a digital correlation technique to capture the full-field displacement thanks to a high-speed camera of a full scale Structure tested on a shaking table. The challenges are both the measurements at a full scale to visualize damages versus the resolution of pictures and the dynamical loading that requires a large number of pictures. The final goal is a better understanding of the seismic behavior of timber-Framed Structures with infill to help at modeling such Structures and predicting their seismic vulnerability. For this purpose, results of shake table tests carried out on a full-scale one-story timber-Framed house filled with stones bonded by an earth based mortar are presented and discussed. DIC full-field measurements allow deriving displacements and accelerations on shear walls as well as lateral forces applied on them. The experimental results presented herein allow analyzing the influence of bracing and might be used to propose optimized aseismic constructions based on cheap technological solutions. These results demonstrate the seismic-resistant behavior of timber-Framed Structures with infill and constitute a key issue for the promotion of such constructions in developing countries.
Pier Paolo Rossi - One of the best experts on this subject based on the ideXlab platform.
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generalized corrective eccentricities for nonlinear static analysis of buildings with Framed or braced Structure
Bulletin of Earthquake Engineering, 2017Co-Authors: Melina Bosco, A Ghersi, Edoardo M Marino, Pier Paolo RossiAbstract:The nonlinear static method of analysis has become the most popular tool for the seismic assessment of existing buildings. However, seismic codes do not allow its use for in-plan irregular buildings because it does not provide accurate predictions of the deck rotation. To overcome this limitation, the “corrective eccentricity method” evaluates the maximum seismic response as the envelope of the results of two nonlinear static analyses. In these analyses, the lateral force is applied with two different (corrective) eccentricities with respect to the centre of mass of the deck. The corrective eccentricities were calibrated on single-storey systems with unidirectional resisting elements, i.e. with elements that are representative of walls or braced frames. This paper proposes new corrective eccentricities aiming at generalizing and simplifying the previous corrective eccentricity method. In particular, new equations are defined for the corrective eccentricities devoted to predict the displacement demand on the stiff side of the building. These equations are defined based on the response of a set of single-storey systems representative of buildings with uni-directional or bi-directional resisting elements (e.g. moment resisting frames). Further, the displacement demand on the flexible side of the building is determined assuming a null eccentricity of the lateral force. The response of a set of multi-storey buildings is predicted by means of the new and original corrective eccentricities and compared to the maximum response obtained by nonlinear dynamic analysis. This comparison is made in terms of floor displacements, storey drifts and storey shears. The set of the examined structural systems comprises buildings with steel braced Structure as well as buildings with r.c. Framed Structure.
Jinkoo Kim - One of the best experts on this subject based on the ideXlab platform.
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displacement based design of supplemental dampers for seismic retrofit of a Framed Structure
Journal of Structural Engineering-asce, 2006Co-Authors: Jinkoo Kim, Hyunhoon ChoiAbstract:The procedure of direct displacement-based design (DBD), presented in the SEOAC Blue Book, was modified to evaluate the seismic performance of existing Structures. Then an optimum number of velocity-dependent supplemental dampers, such as viscous and viscoelastic dampers, required to reduce the seismic response of existing Structures to a given performance limit state was evaluated. The proposed method was applied to seismic performance evaluation and performance-based seismic retrofit of ten- and 20-story steel frames, and the final design was verified by time history analyses using artificial earthquake records generated based on the design spectrum. According to the analysis results, the performance points evaluated by the proposed method match well with those computed by time-history analyses, and the maximum displacements of the model Structures retrofitted by the supplemental dampers corresponded well to the given target values.
Melina Bosco - One of the best experts on this subject based on the ideXlab platform.
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generalized corrective eccentricities for nonlinear static analysis of buildings with Framed or braced Structure
Bulletin of Earthquake Engineering, 2017Co-Authors: Melina Bosco, A Ghersi, Edoardo M Marino, Pier Paolo RossiAbstract:The nonlinear static method of analysis has become the most popular tool for the seismic assessment of existing buildings. However, seismic codes do not allow its use for in-plan irregular buildings because it does not provide accurate predictions of the deck rotation. To overcome this limitation, the “corrective eccentricity method” evaluates the maximum seismic response as the envelope of the results of two nonlinear static analyses. In these analyses, the lateral force is applied with two different (corrective) eccentricities with respect to the centre of mass of the deck. The corrective eccentricities were calibrated on single-storey systems with unidirectional resisting elements, i.e. with elements that are representative of walls or braced frames. This paper proposes new corrective eccentricities aiming at generalizing and simplifying the previous corrective eccentricity method. In particular, new equations are defined for the corrective eccentricities devoted to predict the displacement demand on the stiff side of the building. These equations are defined based on the response of a set of single-storey systems representative of buildings with uni-directional or bi-directional resisting elements (e.g. moment resisting frames). Further, the displacement demand on the flexible side of the building is determined assuming a null eccentricity of the lateral force. The response of a set of multi-storey buildings is predicted by means of the new and original corrective eccentricities and compared to the maximum response obtained by nonlinear dynamic analysis. This comparison is made in terms of floor displacements, storey drifts and storey shears. The set of the examined structural systems comprises buildings with steel braced Structure as well as buildings with r.c. Framed Structure.
