A proper estimation of inelastic dynamic increase factor in support-loss experiments

Tsai, M. H.; Shyu, Wen-Shinn

doi:10.1080/02533839.2014.970388

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The dynamic capacity is the response of a structure at various load factors (λ) in terms of maximum displacement. The neutral capacity [20] is the response of a structure at multiple load factors (λ) in terms of permanent displacements. The dynamic capacity considers the full (maximum) effect of the inertia, while neutral capacity only the permanent effects.…”

Section: Dynamic Response Of Full-scale Structuresmentioning

confidence: 99%

Simulation of the dynamic response of steel moment frames following sudden column loss. Experimental calibration of the numerical model and application

2018

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Significant research effort has been devoted in recent years to the evaluation of the capacity of steel frame structures to resist progressive collapse after sudden column loss. Due to the complex load-structure interaction and material behaviour, it can be very difficult to evaluate the ultimate capacity of structural components using current analytical methods. Therefore considerable research effort has been directed to experimental testing and sophisticated numerical simulations. Although sudden column loss is a dynamic process, most experimental studies on fullscale or scaled down specimens were performed under quasi-static loads. This paper presents the results of a study devoted to the evaluation of steel frame response following the loss of a column. Advanced numerical models are calibrated using experimental test results and dynamic increase factors are studied. Several full-scale structures are investigated for a sudden column loss scenario.

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Section: Dynamic Response Of Full-scale Structuresmentioning

confidence: 99%

Simulation of the dynamic response of steel moment frames following sudden column loss. Experimental calibration of the numerical model and application

2018

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“…The dynamic capacity is the response of a structure for various load factors (λ) in terms of maximum displacement. The neutral capacity [18] is the response of a structure for multiple load factors (λ) in terms of permanent displacement (the neutral displacement is the displacement at which the system is stabilized). increase of the dynamic capacity of the LSZ structure with strengthened connections is about 50% (from 1.26λ to 1.9λ), although the local capacity of the connection increased by more than 100%.…”

Section: Fem Frame Modelling For Column Lossmentioning

confidence: 99%

Multi-Hazard Risk Mitigation through Application of Seismic Design Rules

Dubină

Dinu

Mărginean

2018

KEM

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Multi-story buildings often use steel moment frames as lateral force resisting systems, because such systems would allow architectural flexibility, while providing the strength, stiffness, and ductility required to resist the gravity, wind, and seismic loads. Steel moment frames on which capacity design concepts are applied to resist earthquake induced forces, are generally considered robust structures, with adequate resistance against collapse for other extreme hazards, for example blast or impact. Starting from this point, the present paper summarizes the results of some recent studies carried out in the Department of Steel Structures and Structural Mechanics and CEMSIG Research Center from Politehnica University Timisoara, aiming to evaluate the influence of beam-to-column joints, designed to satisfy seismic design requirements, on the progressive collapse resistance of multi-story steel frame buildings.

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“…Sasani et al [10] investigated the progressive collapse resistance of an actual 11 story structure following severe initial damage, analytically and experimentally, which was caused by concurrent explosion of first floor neighboring columns and studied the axial compressive forces in beams. Tsai and Shyu [11] evaluated the dynamic increase factor, ratio of maximum to neutral response, by progressive collapse assessment of a moment resisting frame. Kim et al [12] investigated the capability of steel moment resisting frame against progressive collapse by employing vertical push-down analysis, and concluded that push-down analysis might overestimate the intrinsic capability of structures to resist progressive collapse.…”

Section: Introductionmentioning

confidence: 99%

Progressive structural capacity loss assessment—A framework for modern reinforced concrete buildings

et al. 2018

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By the virtue of burgeoning terrorism, the exponential growth of advanced weaponry, and allied aids for explosions, it is quite evident that infrastructural facilities in the world have increasingly become more susceptible to sabotaging activities. The ever enhancing employment of reinforced concrete (RC) in the construction industry around the globe, the progressive collapse mechanisms, and respective mitigation strategies in the context of terrorism have garnered quite an attraction by the structural engineering community. The proficiency to envisage the complete collapse under the chain reaction of structural failures, partial collapse of key structural members, or the strength degradation of fundamental structural elements under the blast or impact loading can deliver significant information to cope with partial or complete structural failure. It is quite convenient to say that during the service life, a structure may experience extreme loading conditions. The current study has proposed a new methodology to cover the effect of uncertainty involved in loading on key structural elements of new and complex structures by emphasizing a very realistic structural capacity loss mechanism that allows the incremental reduction in the structural capacities of pivotal structural elements against any sort of impact loading instead of their complete annihilation. To demonstrate the application of the proposed methodology, a 13-story complex structure was selected that was comprised of a diverse structural configuration. The outcomes and results ensured the structural integrity against the applied loadings, as well as the effectiveness of the proposed methodology.

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A proper estimation of inelastic dynamic increase factor in support-loss experiments

Cited by 3 publications

References 16 publications

Simulation of the dynamic response of steel moment frames following sudden column loss. Experimental calibration of the numerical model and application

Simulation of the dynamic response of steel moment frames following sudden column loss. Experimental calibration of the numerical model and application

Multi-Hazard Risk Mitigation through Application of Seismic Design Rules

Progressive structural capacity loss assessment—A framework for modern reinforced concrete buildings

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