An investigation of the effects of mass distribution on pounding structures

Cole, Gregory; Dhakal, Rajesh; Carr, Athol J.; Bull, D.K.

doi:10.1002/eqe.1052

Cited by 43 publications

(38 citation statements)

References 13 publications

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“…Such observations triggered the interest of the research community to study the response of seismically excited adjacent buildings interacting and pounding due to insufficient clearance. Specifically, following early works on the topic (Anagnostopoulos 1988, Wolf & Skrikerud 1980, considerable research work has been devoted in recent years to develop practically useful analytical and computational models for the reliable representation of pounding forces (Anagnostopoulos 2004, Jankowski 2005, Muthukumar & DesRoches 2006, Dimitrakopoulos et al 2009, Ye et al2009, Cole et al 2011 to study the effects of these forces to the dynamic response and to the structural integrity of various types of colliding structures (Mouzakis & Papadrakakis 2004, Jankowski 2008, 2009, Mahmoud & Jankowski 2010, Polycarpou & Komodromos 2010, Giaralis & Spanos 2011, as well as to propose strategies to mitigate these effects (Spiliopoulos and Anagnostopoulos 1996,Xu et al 1999, Anagnostopoulos & Karamateas 2008, Lopez-Garcia & Soong, 2009, Polycarpou & Komodromos 2011.…”

Section: Introductionmentioning

confidence: 99%

Influence of bi-directional seismic pounding on the inelastic demand distribution of three adjacent multi-storey R/C buildings

Skrekas¹,

Sextos²,

Giaralis³

2014

Earthquakes and Structures

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Citation: Skrekas, P., Sextos, A. and Giaralis, A. (2014). Influence of bi-directional seismic pounding on the inelastic demand distribution of three adjacent multi-storey R/C buildings. Earthquakes and Structures, 6(1), pp. 71-87. doi: 10.12989/eas.2014.6.1.071 This is the unspecified version of the paper.This version of the publication may differ from the final published version. Abstract. Interaction between closely-spaced buildings subject to earthquake induced strong ground motions, termed in the literature as "seismic pounding", occurs commonly during major seismic events in contemporary congested urban environments. This influence is not taken into account by current codes of practice and is rarely considered in practice at the design stage of new buildings constructed "in contact" with existing ones. Thus far, limited research work has been devoted to quantify the influence of slab-to-slab pounding on the inelastic seismic demands at critical locations of structural members in adjacent structures that are not aligned in series. In this respect, this paper considers a typical case study of a "new" reinforced concrete (R/C) EC8-compliant, torsionally sensitive, 7-story corner building constructed within a block, in bi-lateral contact with two existing R/C 5-story structures with same height floors. A non-linear local plasticity numerical model is developed and a series of non-linear time-history analyses is undertaken considering the corner building "in isolation" from the existing ones (no-pounding case), and in combination with the existing ones (pounding case). Numerical results are reported in terms of averages of ratios of peak inelastic rotation demands at all structural elements (beams, columns, shear walls) at each storey. It is shown that seismic pounding reduces on average the inelastic demands of the structural members at the lower floors of the 7-story building. However, the discrepancy in structural response of the entire block due to torsioninduced, bi-directionally seismic pounding is substantial as a result of the complex nonlinear dynamics of the coupled building block system. Permanent

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Section: Introductionmentioning

confidence: 99%

Influence of bi-directional seismic pounding on the inelastic demand distribution of three adjacent multi-storey R/C buildings

Skrekas¹,

Sextos²,

Giaralis³

2014

Earthquakes and Structures

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“…Therefore, it is not possible to obtain any exact equivalence between both formulations [Cole et al 2009;Cole et al 2011]. …”

Section: Normal Kelvin-voigt Modelmentioning

confidence: 99%

State-of-the-Art of Research on Seismic Pounding Between Buildings with Aligned Slabs

Kharazian

Almansa

2017

Arch Computat Methods Eng

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Collision between adjoining buildings with aligned slabs is relevant, since the huge impact forces significantly modify the buildings dynamic behavior. The separation required by the regulations avoids pounding; however, even in recent buildings, impact can occur due to not fulfillment of codes and seismicity underestimation. Given the importance of this issue, a significant research effort has been undertaken worldwide, and a considerable number of papers are available. The complexity of this field and this abundance of information might require a review task. This paper presents a summary of the theoretical developments, discusses the most common simulation software, provides an overview of the previous research, offers recommendations to researchers, and identifies research needs.

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“…The oscillators are decoupled with their own mass, stiffness and damping, but have the same mass to ensure equal seismic forces and simplify comparison. Thus, impact can only occur between the structures at the floor or, analogously, the bridge deck level (Cole, Dhakal et al 2011). Seismic accelerations at the base of each oscillator are assumed to be the same because they are located very close to each other (Lig Seismic response of two span scale bridge model due to non-uniform ground excitation and varying subsoil conditions).…”

Section: Linear Model and Basic Model Structurementioning

confidence: 99%

Linear and Nonlinear Seismic Structural Impact Response Spectral Analyses

Chase

Boyer

Rodgers

et al. 2015

Advances in Structural Engineering

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This paper describes analyses of single-degree-of-freedom structures with different spacing, coefficients of restitution, structural periods, and both linear and nonlinear cases, to a suite of earthquake records with equivalent probability of occurrence. A methodology to relate the probability of impact, and the probability of different levels of percentage peak, spectral displacement increase over a suite of events with equivalent probability of occurrence. Thus, both analyses provide a design risk assessed for these different design parameters, which provides a framework for risk analysis and design that is developed and illustrated. It is shown that smaller gaps between structures and greater difference between structural periods independently lead to greater probabilities of impact. Also, smaller gaps, greater coefficients of restitution and structural linearity (i.e. less yielding) lead to increases of structural displacement as a result of impact. The overall results provide significant insight into the design parameters and their sensitivity around structural impact, and provide these results within a risk based framework amenable to designers and the profession. The approach developed may be generalized to other cases with more degrees of freedom, different masses or damping values.

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An investigation of the effects of mass distribution on pounding structures

Cited by 43 publications

References 13 publications

Influence of bi-directional seismic pounding on the inelastic demand distribution of three adjacent multi-storey R/C buildings

Influence of bi-directional seismic pounding on the inelastic demand distribution of three adjacent multi-storey R/C buildings

State-of-the-Art of Research on Seismic Pounding Between Buildings with Aligned Slabs

Linear and Nonlinear Seismic Structural Impact Response Spectral Analyses

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