Iran seismic design loads code assessment through comparing with those of NZS 1170. 5 and criticizing its approach to account for the directivity effects at near source sites.

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Nicknam Ahmad; yusefi dadres yusefi dadres; Mazarei Ali

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Journal Paper

Paper Information

Journal: AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR) Year:2018 | Volume:50 | Issue:4 Page(s): 725-734

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Title

Iran seismic design loads code assessment through comparing with those of NZS 1170. 5 and criticizing its approach to account for the directivity effects at near source sites.

Author(s)

Nicknam Ahmad | yusefi dadres yusefi dadres | Mazarei Ali | Issue Writer Certificate

Keywords

hazard factorQ1

Basic Design AccelerationQ1

spectral shapeQ1

near source forward directivity effectsQ1

NZSQ1

Abstract

This paper intends to assess the existing Iran seismic design loads code (standard No. 2800) through comparing with those of New Zealand seismic code due to their apparent similarity such as; their two parts spectral acceleration form. Both standards represent the seismic hazard level of ten percent chance in fifty years. The assessments made are: the Basic Design Acceleration (A) (in 2800), and the hazard factor (Z) (in NZS), the constant acceleration and constant maximum velocity period ranges of the two spectral shape forms on the four types of site soil conditions, and the directivity effects representative parameters, [N(T), in 2800] and [N(D, T), in NZS]. The 2800’ s spectral accelerations on the four soil types including the FD-pulses are assessed by a hazard-based FD-pulse method. The results of this study quantitatively expose that the existing 2800 s’ spectral accelerations need to be increased at relatively small period ranges of 2 s while get smaller at the period ranges longer than 2s. In other words, the design requirement of spectral accelerations, corresponding to the structures which are widely under construction in near field sites, are smaller than those of the rationale hazard-based values.

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APA: Copy

Nicknam, Ahmad, yusefi dadres, yusefi dadres, & Mazarei, Ali. (2018). Iran seismic design loads code assessment through comparing with those of NZS 1170. 5 and criticizing its approach to account for the directivity effects at near source sites.. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), 50(4 ), 725-734. SID. https://sid.ir/paper/165677/en

Vancouver: Copy

Nicknam Ahmad, yusefi dadres yusefi dadres, Mazarei Ali. Iran seismic design loads code assessment through comparing with those of NZS 1170. 5 and criticizing its approach to account for the directivity effects at near source sites.. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)[Internet]. 2018;50(4 ):725-734. Available from: https://sid.ir/paper/165677/en

IEEE: Copy

Ahmad Nicknam, yusefi dadres yusefi dadres, and Ali Mazarei, “Iran seismic design loads code assessment through comparing with those of NZS 1170. 5 and criticizing its approach to account for the directivity effects at near source sites.,” AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), vol. 50, no. 4 , pp. 725–734, 2018, [Online]. Available: https://sid.ir/paper/165677/en

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