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  • 1
    Online Resource
    Online Resource
    Evaluation of current seismic design equations for nonstructural components in tall buildings using strong motion records
    Wiley ; 2011
    In:  The Structural Design of Tall and Special Buildings Vol. 20, No. S1 ( 2011-12), p. 30-46
    Details
    In: The Structural Design of Tall and Special Buildings, Wiley, Vol. 20, No. S1 ( 2011-12), p. 30-46
    Abstract: A recently completed California Strong Motion Instrumentation Program (CSMIP) data interpretation project used recorded ground and floor motion data to evaluate a key ASCE/SEI 7‐05 (and 7‐10) equation for seismic design of acceleration‐sensitive building nonstructural components. CSMIP motions from 73 earthquakes recorded in 151 fixed‐base buildings were used in the evaluation. An improved equation was developed with two categories of revisions. First, the current code formula considers a linear relationship between the peak floor acceleration (PFA) and the relative height of the component in the building with a roof PFA that is three times that of the peak ground acceleration. The analyses of the recorded motions showed that improved results could be obtained by using a nonlinear relationship and by considering both the building approximate period, T a , and the level of ground motion. Second, the code formula considers a component amplification factor, a p , that takes values between 1.0 and 2.5 depending on the flexibility of the nonstructural component. Analyses showed that component amplification factor can be better represented using a three‐segment spectrum composed of a linear rise from 1.0 to maximum value of a p at short periods, a flat segment with the maximum value of a p at medium‐range periods and a nonlinear decaying segment at longer periods. The shape and amplitude of the spectrum were found to vary depending on T a . This paper evaluates tall buildings with at least 15 stories using the proposed equations and confirms that the revisions provide improvements in matching design equations with recorded response. Copyright © 2011 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 1541-7794 , 1541-7808
    URL: Issue
    URL: Article
    DOI: 10.1002/tal.v20.S1
    DOI: 10.1002/tal.736
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2133303-8
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  • 2
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    Online Resource
    Overview of the 2015 Gorkha, Nepal, Earthquake and the Earthquake Spectra Special Issue
    SAGE Publications ; 2017
    In:  Earthquake Spectra Vol. 33, No. 1_suppl ( 2017-12), p. 1-20
    Details
    In: Earthquake Spectra, SAGE Publications, Vol. 33, No. 1_suppl ( 2017-12), p. 1-20
    Abstract: On 25 April 2015, a M w 7.8 earthquake struck near Gorka, Nepal. The earth-quake and its aftershocks caused over 8,790 deaths and 22,300 injuries; a half a million homes were destroyed; and hundreds of historical and cultural monuments were destroyed or extensively damaged ( NPC 2015 ). Triggered landslides blocked access to road networks, and other lifelines were significantly impacted. Damage occurred in the capital of Kathmandu and the surrounding valley basin, but the most heavily affected areas were in more rural regions of central Nepal where losses to some towns were severe. Recovery has been slow, but progress is being made in rebuilding and repairing lost and damaged buildings and infrastructure. This Earthquake Spectra special issue provides a compendium of research papers on the Gorkha earthquake. They are organized into five topics: (1) seismology, ground motion, and geotechnical issues; (2) lifelines; (3) buildings; (4) cultural heritage structures; and (5) social science and public policy related topics. This overview summarizes key aspects of the earthquake and highlights findings from the special issue papers.
    Type of Medium: Online Resource
    ISSN: 8755-2930 , 1944-8201
    URL: Article
    DOI: 10.1193/120817eqs252m
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2183411-8
    SSG: 16,13
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  • 3
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    Online Resource
    Evaluation of Earthquake-Damaged Concrete and Masonry Wall Buildings
    SAGE Publications ; 2000
    In:  Earthquake Spectra Vol. 16, No. 1 ( 2000-02), p. 263-283
    Details
    In: Earthquake Spectra, SAGE Publications, Vol. 16, No. 1 ( 2000-02), p. 263-283
    Abstract: Efforts at improving earthquake recovery policies have been hampered by a lack of criteria and standards for evaluating and repairing damaged buildings. The Applied Technology Council has developed a performance-based methodology for the evaluation of earthquake-damaged concrete wall buildings and masonry wall buildings, recently published as FEMA 306/307/308. The methodology provides a way to quantify damage in terms of loss of seismic performance capability. It also provides guidelines for remedial measures to restore or improve seismic performance capability. In this methodology, the expected future seismic performance of a building is evaluated in its pre-event, damaged, and repaired conditions. Following the nonlinear static analysis procedure, displacement demands and capacities of the structure are used as indices of seismic performance. Identifying the governing mechanism of nonlinear deformation and the behavior mode of a structure and its components is shown to be a necessary first step towards evaluating expected seismic performance, interpreting indications of damage, and assessing their significance. The methodology provides a technical resource for understanding how buildings respond seismically on both global and component levels, and gives a basis for formulating post-earthquake policies.
    Type of Medium: Online Resource
    ISSN: 8755-2930 , 1944-8201
    URL: Article
    DOI: 10.1193/1.1586111
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2000
    detail.hit.zdb_id: 2183411-8
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  • 4
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    Online Resource
    Post-Earthquake Building Safety Inspection: Lessons from the Canterbury, New Zealand, Earthquakes
    SAGE Publications ; 2013
    In:  Earthquake Spectra Vol. 29, No. 3 ( 2013-08), p. 1091-1107
    Details
    In: Earthquake Spectra, SAGE Publications, Vol. 29, No. 3 ( 2013-08), p. 1091-1107
    Abstract: The authors discuss some of the unique aspects and lessons of the New Zealand post-earthquake building safety inspection program that was implemented following the Canterbury earthquake sequence of 2010–2011. The post-event safety assessment program was one of the largest and longest programs undertaken in recent times anywhere in the world. The effort engaged hundreds of engineering professionals throughout the country, and also sought expertise from outside, to perform post-earthquake structural safety inspections of more than 100,000 buildings in the city of Christchurch and the surrounding suburbs. While the building safety inspection procedure implemented was analogous to the ATC 20 program in the United States, many modifications were proposed and implemented in order to assess the large number of buildings that were subjected to strong and variable shaking during a period of two years. This note discusses some of the key aspects of the post-earthquake building safety inspection program and summarizes important lessons that can improve future earthquake response.
    Type of Medium: Online Resource
    ISSN: 8755-2930 , 1944-8201
    URL: Article
    DOI: 10.1193/1.4000151
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2183411-8
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  • 5
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    Online Resource
    Lessons from the Post-Earthquake Evaluation of Damaged Buildings in Christchurch
    SAGE Publications ; 2014
    In:  Earthquake Spectra Vol. 30, No. 1 ( 2014-02), p. 451-474
    Details
    In: Earthquake Spectra, SAGE Publications, Vol. 30, No. 1 ( 2014-02), p. 451-474
    Abstract: The New Zealand Society for Earthquake Engineering (NZSEE) building safety evaluation process was implemented in several earthquakes that occurred as part of the 2010–2011 Canterbury earthquake sequence. This provided an opportunity to evaluate the effectiveness of the current processes across a range of issues. In addition to the established rapid assessments, guidelines have been developed for the detailed engineering evaluation of damaged buildings. Lessons have been drawn from these experiences relating to the effectiveness of placards and the rapid visual assessment of damage, requirements for a full spectrum of assessment processes, and training needs. Improvements to the current building safety evaluation processes are proposed and further considerations for reoccupation of damaged buildings are outlined. While this paper is based on the authors’ experiences in New Zealand, the findings are expected to have wider applications.
    Type of Medium: Online Resource
    ISSN: 8755-2930 , 1944-8201
    URL: Article
    DOI: 10.1193/022813EQS057M
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2183411-8
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  • 6
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    Online Resource
    Regenesis
    American Society of Civil Engineers (ASCE) ; 2006
    In:  Civil Engineering Magazine Vol. 76, No. 9 ( 2006-09), p. 38-99
    Details
    In: Civil Engineering Magazine, American Society of Civil Engineers (ASCE), Vol. 76, No. 9 ( 2006-09), p. 38-99
    Type of Medium: Online Resource
    ISSN: 2381-0688
    URL: Article
    DOI: 10.1061/ciegag.0000091
    Language: English
    Publisher: American Society of Civil Engineers (ASCE)
    Publication Date: 2006
    detail.hit.zdb_id: 2068752-7
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