Importance of seismic design accidental torsion requirements for building collapse capacity          下载免费PDF全文

D. Jared DeBock  Abbie B. Liel  Curt B. Haselton  John D. Hooper  Richard A. Henige Jr. 《地震工程与结构动力学》2014,43(6):831-850

Seismic ground motions induce torsional responses in buildings that can be difficult to predict. To compensate for this, most modern building codes require the consideration of accidental torsion when computing design earthquake forces. This study evaluates the influence of ASCE/SEI 7 accidental torsion seismic design requirements on the performance of 230 archetypical buildings that are designed with and without accidental torsion design provisions, taking building collapse capacity as the performance metric. The test case archetypes include a broad range of heights, gravity load levels, and plan configurations. Results show that the ASCE/SEI 7 accidental torsion provisions lead to significant changes in collapse capacity for buildings that are very torsionally flexible or asymmetric. However, only inconsequential changes in collapse capacity are observed in the buildings that are both torsionally stiff and regular in plan. Therefore, the study concludes that accidental torsion provisions are not necessary for seismic design of buildings without excessive torsional flexibility or asymmetry. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Airborne gravity tests in the Italian area to improve the geoid model of Italy     

R. Barzaghi  A. Borghi  K. Keller  R. Forsberg  I. Giori  I. Loretti  A.V. Olesen  L. Stenseng 《Geophysical Prospecting》2009,57(4):625-632

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