Mutual pounding of adjacent structures during earthquakes

Wolf, John P.; Skrikerud, Petter

doi:10.1016/0029-5493(80)90106-5

Cited by 60 publications

(35 citation statements)

References 5 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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“…4a) vibrates with T pd and ξ pd ; while the system with one-side pounding ( fig. 4b), in addition to the peak of harmonic response, the peak of socalled subharmonic response appears at twice the resonant frequency of the pounding system [3]. However, the subharmonic response does not seem to have any significant effect.…”

Section: Harmonic Vibration With Pounding 41 Equivalent Damping Ratiomentioning

confidence: 96%

“…The collision between two buildings is typically simulated by contact element, which becomes active only when contact is detected. Several types of contact element such as linear/nonlinear spring element, and linear/nonlinear viscoelastic element have been used for pounding simulation [3][4][5]. The use of numerical methods for this nonlinear dynamic problem poses many difficulties and requires time-consuming efforts.…”

Section: Introductionmentioning

confidence: 99%

Spectrum-based estimation method for peak structural responses of a SDOF system pounding against rigid structures

Tran¹,

Kasai²

2006

WIT Transactions on the Built Environment, Vol 87

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A spectrum-based method is proposed for predicting peak responses of a SDOF system that pounds against adjacent rigid structure(s) during an earthquake. Pounding is considered to occur on either one side or two sides of the system. The contact element is simulated by the Kelvin body combining a spring and a dashpot in parallel. Based on free vibration and harmonic vibration both involving pounding, the equivalent period and damping of the SDOF system are obtained and used to predict peak displacements as well as collision force. The accuracy of the proposed method is demonstrated via extensive numerical experiments over a variety of combinations of system properties, contact element properties, separation distances, and earthquakes.

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“…[49]), and between adjacent buildings (e.g. [50][51]). They also include cases of structures whose lateral movement is restricted via "stopsupports" and restrainers such as in above-ground pipelines along their transversal direction (e.g.…”

Section: Piecewise Linear Restoring Forcementioning

confidence: 99%

Effective linear damping and stiffness coefficients of nonlinear systems for design spectrum based analysis

Giaralis

Spanos

2010

Soil Dynamics and Earthquake Engineering

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Citation: Giaralis, A. & Spanos, P. D. (2010). Effective linear damping and stiffness coefficients of nonlinear systems for design spectrum based analysis. Soil Dynamics and Earthquake Engineering, 30(9), pp. 798-810. doi: 10.1016/j.soildyn.2010.01.012 This is the unspecified version of the paper.This version of the publication may differ from the final published version. Permanent ABSTRACTA stochastic approach for obtaining reliable estimates of the peak response of nonlinear systems to excitations specified via a design seismic spectrum is proposed. This is achieved in an efficient manner without resorting to numerical integration of the governing nonlinear equations of motion. First, a numerical scheme is utilized to derive a power spectrum which is compatible in a stochastic sense with a given design spectrum. This power spectrum is then treated as the excitation spectrum to determine effective damping and stiffness coefficients corresponding to an equivalent linear system (ELS) via a statistical linearization scheme. Further, the obtained coefficients are used in conjunction with the (linear) design spectrum to estimate the peak response of the original nonlinear systems. The cases of systems with piecewise linear stiffness nonlinearity, along with bilinear hysteretic systems are considered. The seismic severity is specified by the elastic design spectrum prescribed by the European aseismic code provisions (EC8). Monte Carlo simulations 2 pertaining to an ensemble of non-stationary EC8 design spectrum compatible accelerograms are conducted to confirm that the average peak response of the nonlinear systems compare reasonably well with that of the ELS, within the known level of accuracy furnished by the statistical linearization method. In this manner, the proposed approach yields ELS which can replace the original nonlinear systems in carrying out computationally efficient analyses in the initial stages of the aseismic design of structures under severe seismic excitations specified in terms of a design spectrum.

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Mutual pounding of adjacent structures during earthquakes

Cited by 60 publications

References 5 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

Spectrum-based estimation method for peak structural responses of a SDOF system pounding against rigid structures

Effective linear damping and stiffness coefficients of nonlinear systems for design spectrum based analysis

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