A bounding surface extension of SANICLAY plasticity model for nonlinear site response analysis

2014 ◽  
pp. 1295-1300
Author(s):  
Mahdi Taiebat ◽  
Gaziz Seidalinov
Keyword(s):  
Site Response ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Plasticity Model ◽  
Bounding Surface ◽  
Nonlinear Site Response

scholarly journals 1D Effective Stress Site Response Analysis; Using Stress Based Pore Pressure Model and Plasticity Model

2020 ◽  
pp. 6-12
Keyword(s):  
Effective Stress ◽  
Site Response ◽  
Research Work ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Generation Model ◽  
Plasticity Model ◽  
Ground Acceleration ◽  
Sand Column ◽  
Nonlinear Site Response

The accumulated stress based porewater pressure (PWP) generation model is a simplified model using the concept of damage parameter. The only input of this PWP model is liquefaction resistance curve (CRR-N). The model is very useful since the CSR-N curves can be developed empirically from in-situ penetration tests measurements. In this research work the estimation of excess PWP development during seismic loading by using stress based PWP generation model is compared with a rigorous plasticity model. One dimensional (1D) effective stress nonlinear site response analyses were conducted in DEEPSOIL and Opensees using the stress based PWP model and PressureDependentMultiYield02 (PDMY2) model, respectively. The site response analysis were performed on a sand column 30 m in depth comprises of a low density liquefiable layer in between two dense non-liquefiable layers. Three bed rock outcropping motions with peak ground acceleration (PGA) level of 0.11 g, 0.124 g and 0.357 g were used as input motion in the analysis. The maximum ru profiles computed from the two models were compared and analyzed. The ru time histories at the center of the non-liquefiable layers and liquefiable layer were also compared. The comparisons revealed that the two models used in this study compute most comparable ru values. The computed ru is also found in line with density of soil and the PGA of the input ground motions where the ru increases with increase in the PGA and decreases with increasing density.

Effect of Parameters on Equivalent Number of Cycles Using ‎Nonlinear Seismic Site Response Analysis

2011 ◽  
Vol 255-260 ◽  
pp. 2365-2369
Author(s):  
Emad Gheibi ◽  
Mohammad Hosein Bagheripour
Keyword(s):  
Site Response ◽  
Time History ◽  
Current Approach ◽  
Earthquake Magnitude ◽  
Soil Liquefaction ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Nonlinear Site Response ◽  
Equivalent Number ◽  
Number Of Cycles

The concept of equivalent number of uniform stress cycles, is essential for assessment of soil liquefaction potential. In this regard, various procedures are used to convert random acceleration time history to uniform cycles having amplitude of 0.65 of peak acceleration. Equivalent number of cycles (Neq) defines equivalent energy generated by harmonic loading as that imposed by irregular motion during an earthquake. Neq is assumed to be a function of earthquake magnitude. Over the past years, in accordance with development in methods of soil liquefaction evaluation, various methods have been proposed to determinate equivalent number of cycles. In particular, parameters like site to source distance (r), have been related directly to Neq. In this study, more than 80 earthquake records have been investigated and their Neqs are assessed using energy approach and nonlinear site response analysis. It is shown that equivalent number of cycles is related to earthquake magnitude (M), r and depth of originated signals. Unlike previous methods which result in scatter in output data, current approach has led to more uniform and consistent results for each earthquake.

scholarly journals 1D Effective Stress Site Response Analysis; Using Stress Based Pore Pressure Model and Plasticity Model

2020 ◽  
Vol 10 (1) ◽  
pp. 6
Author(s):  
Saeed Jan Mandokhail ◽  
Naik Muhammad ◽  
Muhammad Habib ◽  
Muhammad Irfan ◽  
Salah Uddin ◽  
...  
Keyword(s):  
Pore Pressure ◽  
Effective Stress ◽  
Site Response ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Plasticity Model

scholarly journals PRENOLIN: International Benchmark on 1D Nonlinear Site‐Response Analysis—Validation Phase Exercise

2018 ◽  
Author(s):  
Julie Régnier ◽  
Luis‐Fabian Bonilla ◽  
Pierre‐Yves Bard ◽  
Etienne Bertrand ◽  
Fabrice Hollender ◽  
...  
Keyword(s):  
Site Response ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Validation Phase ◽  
Nonlinear Site Response
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