Computational modelling of dynamic soil-structure interaction in shear wall buildings with basements in medium stiffness sandy soils using a subdomain spectral element approach calibrated by micro-vibrations

2022 ◽  
Vol 252 ◽  
pp. 113668
Author(s):  
Felipe Ayala ◽  
Esteban Sáez ◽  
Carolina Magna-Verdugo
Keyword(s):  
Soil Structure ◽  
Computational Modelling ◽  
Sandy Soils ◽  
Shear Wall ◽  
Spectral Element ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Element Approach

Study of Responses of 64-Story Rincon Building to Napa, Fremont, Piedmont, San Ramon Earthquakes and Ambient Motions

2017 ◽  
Vol 33 (3) ◽  
pp. 1125-1148 ◽  
Author(s):  
Mehmet Çelebi ◽  
John Hooper ◽  
Ron Klemencic
Keyword(s):  
San Francisco ◽  
Soil Structure ◽  
Nonlinear Behavior ◽  
Shear Wall ◽  
Soil Structure Interaction ◽  
Concrete Core ◽  
Structure Interaction ◽  
Fundamental Frequencies ◽  
Ambient Data ◽  
Liquid Dampers

We analyze the recorded responses of a 64-story, instrumented, concrete core shear wall building in San Francisco, California, equipped with tuned sloshing liquid dampers (TSDs) and buckling restraining braces (BRBs). Previously, only ambient data from the 72-channel array in the building were studied ( Çelebi et al. 2013 ). Recently, the 24 August 2014 Mw 6.0 Napa and three other earthquakes were recorded. The peak accelerations of ambient and the larger Napa earthquake responses at the basement are 0.12 cm/s/s and 5.2 cm/s/s respectively—a factor of ∼42. At the 61st level, they are 0.30 cm/s/s (ambient) and 16.8 cm/s/s (Napa), respectively—a factor of ∼56. Fundamental frequencies (NS ∼ 0.3, EW ∼ 0.27 Hz) from earthquake responses vary within an insignificant frequency band of ∼0.02–0.03 Hz when compared to those from ambient data. In the absence of soil-structure interaction (SSI), these small and insignificant differences may be attributed to (1) identification errors, (2) any nonlinear behavior, and (3) shaking levels that are not large enough to activate the BRBs and TSDs to make significant shifts in frequencies and increase damping.

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