Seismic‐Energy Dissipation in MDOF Structures

Léger, Pierre; Dussault, Serge

doi:10.1061/(asce)0733-9445(1992)118:5(1251)

Cited by 167 publications

(97 citation statements)

References 19 publications

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“…In the history of seismic-resistant design of building structures, the earthquake input energy has played an important role together with deformation and acceleration [for example, Housner (1959[for example, Housner ( , 1975, Berg and Thomaides (1960), Housner and Jennings (1975), Zahrah and Hall (1984), Akiyama (1985), and Leger and Dussault (1992)]. While deformation and acceleration can predict and evaluate the performance of a building structure mainly for serviceability, the energy can evaluate the performance of a building structure mainly for safety.…”

Section: Introductionmentioning

confidence: 99%

Critical Earthquake Response of Elastic–Plastic Structures Under Near-Fault Ground Motions (Part 1: Fling-Step Input)

Kojima

Takewaki

2015

Front. Built Environ.

131

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Section: Introductionmentioning

confidence: 99%

Critical Earthquake Response of Elastic–Plastic Structures Under Near-Fault Ground Motions (Part 1: Fling-Step Input)

Kojima

Takewaki

2015

Front. Built Environ.

131

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“…A structure is considered to resist an earthquake ground motion provided that the energy input to the structure from the earthquake is lower than its energy absorption capacity. Following this, the EBD concept as well as the determination of elastic and/or hysteretic energy distributions were examined for MDOF systems (Berg and Thomaides, 1960;Penzien, 1960;Zahrah and Hall, 1982;Akiyama, 1985;Nakamura and Yamane, 1986;Léger and Dussault, 1992;Rodriguez, 1994;Nakashima et al, 1996;Connor et al, 1997). Chou and Uang (2003) presented a procedure for the distribution of seismic energy demand over the floors of a MDOF system solely by modal superposition of energy shapes, which are established from a static pushover analysis.…”

Section: Literature Reviewmentioning

confidence: 99%

A New Energy-Based Structural Design Optimization Concept under Seismic Actions

Papazafeiropoulos

Plevris

Papadrakakis

2017

Front. Built Environ.

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A new optimization concept is introduced which involves the optimization of non-linear planar shear buildings by using gradients based on equivalent linear structures, instead of the traditional practice of calculating the gradients from the non-linear objective function. The optimization problem is formulated as an equivalent linear system of equations in which a target fundamental eigenfrequency and equal dissipated energy distribution within the storeys of the building are the components of the objective function. The concept is applied in a modified Newton-Raphson algorithm in order to find the optimum stiffness distribution of two representative linear or non-linear MDOF shear buildings, so that the distribution of viscously damped and hysteretically dissipated energy, respectively, over the structural height is uniform. A number of optimization results are presented in which the effect of the earthquake excitation, the critical modal damping ratio, and the normalized yield inter-storey drift limit on the optimum stiffness distributions is studied. Structural design based on the proposed approach is more rational and technically feasible compared to other optimization strategies (e.g., uniform ductility concept), whereas it is expected to provide increased protection against global collapse and loss of life during strong earthquake events. Finally, it is proven that the new optimization concept not only reduces running times by as much as 91% compared to the classical optimization algorithms but also can be applied in other optimization algorithms which use gradient information to proceed to the optimum point.

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“…Inappropriate damping assumptions may lead to extravagantly unrealistic responses that considerably di er from the real responses of the buildings [42]. Perform-3D software is able to implement Rayleigh damping as well as modal damp- ing [41].…”

Section: Nonlinear Modelingmentioning

confidence: 99%

Forward directivity near-fault and far-fault ground motion effects on the responses of tall reinforced concrete walls with buckling-restrained brace outriggers

Beiraghi

2017

Scientia Iranica

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Abstract. In this study, the responses of reinforced concrete core-wall structures connected to the outside columns by Buckling-Restrained Brace (BRB) outriggers in tall buildings were investigated. The buildings were subjected to forward directivity Near-Fault (NF) and ordinary Far-Fault (FF) ground motions. According to the current codes for the DBE level, the response spectrum analysis procedure was applied to analyze and design the structures. The nonlinear ber element approach was used to simulate the reinforced concrete core-walls. Nonlinear time history analysis was implemented using 14 NF as well as 14 FF records at MCE level. In the core-wall, the results showed that the mean moment demand envelope and the mean shear demand envelope obtained from the NF records were approximately similar to the corresponding demand envelopes from FF records. The reason had to do with extending plasticity all over the RC core-wall, which was subjected to both sets of records. The overall responses of the reinforced concrete core-wall with BRB outrigger system were in acceptable range both for NF and FF earthquakes. In this study, the largest curvature ductility demand in the reinforced concrete core-wall took place at levels just above the outriggers.

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Seismic‐Energy Dissipation in MDOF Structures

Cited by 167 publications

References 19 publications

Critical Earthquake Response of Elastic–Plastic Structures Under Near-Fault Ground Motions (Part 1: Fling-Step Input)

Critical Earthquake Response of Elastic–Plastic Structures Under Near-Fault Ground Motions (Part 1: Fling-Step Input)

A New Energy-Based Structural Design Optimization Concept under Seismic Actions

Forward directivity near-fault and far-fault ground motion effects on the responses of tall reinforced concrete walls with buckling-restrained brace outriggers

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