Comprehensive amplification estimation of the Indo Gangetic Basin deep soil sites in the seismically active area

被引：19

作者：

Bajaj, Ketan ^{[1
]}

Anbazhagan, P. ^{[1
]}

机构：

[1] Indian Inst Sci, Bangalore, Karnataka, India

来源：

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2019年 / 127卷

关键词：

Deep basin; Seismic site classification; Amplification; Seismic site factors; Acceleration design response spectra; Site response study; SHEAR MODULUS; SPT-N; EARTHQUAKE; CLASSIFICATION; HIMALAYA; WAVES; ROCK; COEFFICIENTS; INVERSION; SHILLONG;

D O I：

10.1016/j.soildyn.2019.105855

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Site amplification coefficients and acceleration design response spectra (ADRS) for the deep Indo-Gangetic Basin (IGB) have been proposed. Non-linear site response analysis is carried out at 275 deep shear wave velocity (V-S) profiles by selecting the input motion based on seismic hazard map for 10% probability of exceedence in 50 years. The spatial variation map of peak ground acceleration (PGA) and spectral acceleration (SA) at surface and various depths for the JOB are also presented. The bedrock PGA of 0.03-0.24 g increased to 0.1-0.97 g at surface and 0.05-0.35 g at a depth of 150 m. Maximum SA is observed between 0.08 s and 0.5 sec. The new site factors viz. F-a and F-v are derived for newly defined spectral period range. Further, ADRS is constructed which depends on PGA and seismic site class as per NEHRP. Proposed ADRS is compared with different deep basin studies and BIS:1893.

引用

页数：14

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