Seismic Soil-Structure Interaction in Buildings. II: Empirical Findings

The lateral load distributions specified by seismic design provisions are primarily based on elastic behaviour of fixed-base structures without considering the effects of soil-structure-interaction (SSI).Consequently, such load patterns may not be suitable for seismic design of non-linear flexible-base structures. In this paper, a practical optimization technique is introduced to obtain optimum seismic design loads for non-linear shear-buildings on soft soils based on the concept of uniform damage distribution. SSI effects are taken into account by using the cone model. Over 30,000 optimum load patterns are obtained for 21 earthquake excitations recorded on soft soils to investigate the effects of fundamental period of the structure, number of stories, ductility demand, earthquake excitation, damping ratio, damping model, structural post yield behaviour, soil flexibility and structural aspect ratio on the optimum load patterns.The results indicate that the proposed optimum load patterns can significantly improve the seismic performance of flexible-base buildings on soft soils.

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“…The results of Stewart et al [38] study imply that by increasing 0 a , the effects of SSI would be generally more significant. It can be…”

Section: Governing Interacting Parametersmentioning

confidence: 85%

Optimum lateral load distribution for seismic design of nonlinear shear-buildings considering soil-structure interaction

Ganjavi

Hajirasouliha

Bolourchi

2016

Soil Dynamics and Earthquake Engineering

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“…Theoretical or numerical approaches (e.g. [1][2][3][4][5][6][7][8][9][10]) are powerful tools even if the obtained results are affected by the reliability of the data and by the analysis assumptions. Monitoring of full-scale structures is frequently characterized by unknown boundary conditions and requires a large monitoring period which is a rare occurrence (e.g.…”

Section: Introductionmentioning

confidence: 99%

Some Experimetnal Evidences on Dynamic Soil-Structure Interaction

Massimino¹,

Biondi²

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…65 s for the 'short' and 'long' period structures, respectively. The characteristics of the models are compared to the measured properties of a variety of real structures (after Goel & Chopra (1997) and Stewart et al (1999)) in Fig. 2.…”

Section: Model Structuresmentioning

confidence: 99%

“…3 (PM003 and PM006 are shown as examples). These were used to measure the input motion (point E), free-field ground motion 1 m below the ground surface (point F) and accelerations beneath (D) and between (G) the structures at the same depth as the Building height, H: m Field data (Stewart , 1999) free-field instrument, to examine near-field effects of SSSI on the ground motion. Identical accelerometers were also attached to the structures, as shown in Fig.…”

Section: Model Preparation and Soil Propertiesmentioning

confidence: 99%

Seismic structure–soil–structure interaction between pairs of adjacent building structures

Knappett¹,

Madden²,

Caucis³

2015

Geotechnical Earthquake Engineering

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Seismic structure-soil-structure interaction between pairs of adjacent building structures Knappett, Jonathan; Madden, P.; Caucis, K. Published in: Géotechnique DOI:10.1680/geot.SIP.14.P.059 Publication date: 2015 Document VersionPublisher's PDF, also known as Version of record Link to publication in Discovery Research PortalCitation for published version (APA): Knappett, J. A., Madden, P., & Caucis, K. (2015). Seismic structure-soil-structure interaction between pairs of adjacent building structures. Géotechnique, 65(5), 429-441. DOI: 10.1680/geot.SIP.14.P.059 General rightsCopyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain.• You may freely distribute the URL identifying the publication in the public portal. Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Structure-soil-structure interaction between adjacent structures, which may occur in densely populated urban areas, has received little attention compared to the soil-structure interaction of single isolated structures. Additionally, recent earthquakes in/near such areas (e.g. the Christchurch series, 2010-2011) have shown that large motions can be followed by strong aftershocks. In this paper, the seismic behaviour of isolated structures and pairs of adjacent structures under a sequence of strong ground motions has been investigated using a combination of centrifuge and finite-element modelling. The latter utilised an advanced constitutive model that can be parameterised from routine test data, making it suitable for use in routine design. The finite-element models were shown to accurately simulate the centrifuge-measured response (in terms of surface ground motion and structural sway, settlement and rotation) even after multiple strong aftershocks, so long as the buildings' initial conditions were reproduced accurately. For the case of a building structure with a close neighbour, structural drift and co-seismic settlement could be reduced or increased as a result of structure-soil-structure interaction, depending chiefly on the properties of the adjacent structure. This suggests that careful arrangement of adjacent structures and specification of their properties could be used to control the effects of structure-soil-structure interaction. In all cases where adjacent structures were present, permanent rotation (structural tilt) was observed to increase significantly, demonstrating the importance of considering structure-soil-structure interaction in assessing...

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Seismic Soil-Structure Interaction in Buildings. II: Empirical Findings

Cited by 217 publications

References 8 publications

Optimum lateral load distribution for seismic design of nonlinear shear-buildings considering soil-structure interaction

Optimum lateral load distribution for seismic design of nonlinear shear-buildings considering soil-structure interaction

Some Experimetnal Evidences on Dynamic Soil-Structure Interaction

Seismic structure–soil–structure interaction between pairs of adjacent building structures

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