Observations of the performance of buildings during the 1985 Mexico earthquake, and structural design implications

Scholl, R.E.

doi:10.1007/bf01552841

Cited by 20 publications

(16 citation statements)

References 2 publications

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“…In the 1976 Tangshan earthquake, the instantaneous settlement of 3-4-story buildings reached 10-30 cm in Tanggu area, and the differential settlement kept developing several years after the earthquake [9] . Such phenomena were also found in the 1957 and 1985 Mexico Earthquakes [10] , and the 1978 Miyagi-oki Earthquake [11] . Figure 1 shows the seismic settlements of a building foundation during and after the 1957 Mexico City Earthquake.…”

Section: Introductionmentioning

confidence: 98%

Centrifuge model test on earthquake-induced differential settlement of foundation on cohesive ground

Zhou

Chen

Shamoto

et al. 2009

Sci. China Ser. E-Technol. Sci.

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Dynamic centrifuge model test was conducted to study the earthquake-induced differential settlement of foundation on cohesive ground, and the influence of asymmetry of building was investigated. During the experiment, the overconsolidated kaolin clay ground with a three-dimensional asymmetrical structure model was shaken by a basically balanced input motion, and bender elements were used to measure shear wave velocities of model ground to reveal the soil fabric evolution during and after shaking. The test results show that, the total seismic settlement of foundation is composed of instantaneous and long-term post-earthquake settlements, and most of the differential settlement occurs immediately after the earthquake while the post-earthquake settlement is relatively uniform despite its large amplitude. The asymmetry of building affects the settlement behavior considerably. Compared with 1-or 2-dimensional structures, more evident differential settlement occurs under three-dimensional asymmetrical building during shaking, which accounts for one-half of the total seismic settlements and results in complex spatial tilting effects of foundation.soft clay, centrifuge model test, shaking table, earthquake-induced differential settlement, bender elements

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Section: Introductionmentioning

confidence: 98%

Centrifuge model test on earthquake-induced differential settlement of foundation on cohesive ground

Zhou

Chen

Shamoto

et al. 2009

Sci. China Ser. E-Technol. Sci.

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“…There have been specific studies to investigate damage due to pounding for existing buildings and specific situations (Rosenblueth 1986;Scholl 1989;Kasai 1997;Jankowski, Wilde et al 2000;Raheem 2006;Jankowski 2007a;Raheem 2009;Mahmoud, Abd-Elhamed et al 2013;Raheem 2014). These reports highlighted the importance of adequate design for weaker buildings for which structural pounding can produce catastrophic damage.…”

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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“…Many CBFs were destroyed and even collapsed in past earthquakes due to their poor performance. Regardless of the fact that numerous experimental and theoretical studies have been carried out for CBFs, the CBF system still suffers from various degrees of damage due to its poor ductility [3][4][5][6][7][8]. Thus, the CBFs constructed based on poor design guides in earlier days still attract the attention of researchers [9][10][11][12][13][14][15][16][17][18] CBFs in moderate seismic regions (MSRs) are typically designed using a response modification coefficient R equal to 3, which allows the seismic resistance detailing of a structure to be ignored, e.g., in the United States [19].…”

Section: Introductionmentioning

confidence: 99%

Seismic Collapse Analysis of Concentrically-Braced Frames by the Ida Method

Yang¹,

Li²,

Dong³

et al. 2017

Volume 13 Number 3

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Steel concentrically-braced frames (CBFs) as seismic lateral force resisting systems have been widely used in seismic regions. The incremental dynamic analysis (IDA) is adopted to construct the collapse ductility spectrum for the CBF considering the P-Δ effect and sudden loss in strength and stiffness, which is physically more meaningful than existing baseline criteria. The design performance plot is constructed by newly combining the collapse ductility spectrum with ductility demand spectrum on the same figure, from which the threshold period and design ductility region for the frame are determined. A parametric study is conducted for the CBF over the full range of periods and parameters. The results show that the reserve capacity of the CBF contributes appreciably to collapse prevention, and the presented approach is more suitable for assessing the collapse of CBFs with dynamic instability. For moderate seismic regions, the threshold periods of the CBF determined by both the collapse ductility spectrum and existing baseline criteria are quite close. However, for high seismic regions, using the global drift angle limit may yield non-conservative results, since it fails to address the dynamic instability of CBFs with short periods.

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Observations of the performance of buildings during the 1985 Mexico earthquake, and structural design implications

Cited by 20 publications

References 2 publications

Centrifuge model test on earthquake-induced differential settlement of foundation on cohesive ground

Centrifuge model test on earthquake-induced differential settlement of foundation on cohesive ground

Linear and Nonlinear Seismic Structural Impact Response Spectral Analyses

Seismic Collapse Analysis of Concentrically-Braced Frames by the Ida Method

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