scholarly journals Simplified Analyses of Dynamic Pile Response Subjected to Soil Liquefaction and Lateral Spread Effects

10.5772/27209 ◽  
2012 ◽  
Author(s):  
Lin Bor-Shiun
Keyword(s):  
Soil Liquefaction ◽  
Lateral Spread ◽  
Pile Response

scholarly journals Probabilistic-Based Assessment of Liquefaction-Induced Damage with Analytical Fragility Curves

Geosciences ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 315
Author(s):  
Davide Forcellini
Keyword(s):  
Case Studies ◽  
Numerical Models ◽  
Fragility Curves ◽  
Free Field ◽  
Historical Earthquakes ◽  
Soil Liquefaction ◽  
Lateral Spread ◽  
Shear Behaviour ◽  
Cyclic Shear ◽  
Lp Estimation

Soil liquefaction may cause severe damages to structures mainly in terms of lateral spread and settlements, as documented during historical earthquakes. Liquefaction-potential (LP) estimation has become an important issue in seismic assessment, and this paper aims to propose a new methodology based on fragility curves. LP curves were developed and applied to two case studies performed with 3D numerical models applying Opensees. Nonlinear hysteretic materials and advanced plasticity models were used to reproduce the high nonlinear mechanisms of liquefaction, such as strong dilation tendency and cyclic shear behaviour. LP curves were applied to compare the results of the performed free field (FF) and soil–structure interaction (SSI) case studies.

scholarly journals Seismic Fragility for a Masonry-Infilled RC (MIRC) Building Subjected to Liquefaction

2021 ◽  
Vol 11 (13) ◽  
pp. 6117
Author(s):  
Davide Forcellini
Keyword(s):  
Fragility Curves ◽  
Historical Earthquakes ◽  
Soil Liquefaction ◽  
Lateral Spread ◽  
Cyclic Behavior ◽  
Structural Performance ◽  
Seismic Fragility ◽  
Fundamental Issue ◽  
Cyclic Shear ◽  
Seismic Engineering

Historical earthquakes have documented that lateral spread and settlements are the most significant damages induced by soil liquefaction. Therefore, assessing its effects on structural performance has become a fundamental issue in seismic engineering. In this regard, the paper proposes to develop analytical fragility curves of a Masonry-Infilled RC (MIRC) structure subjected to liquefaction-induced damages. In order to reproduce the nonlinear cyclic behavior (dilation tendency and the increase in cyclic shear strength) due to liquefaction, nonlinear hysteretic materials and advanced plasticity models were applied. The findings herein obtained in terms of seismic fragility of the MIRC building subjected to liquefaction may be implemented as guidelines or code provisions.

DINSAR APPLICATION FOR DETECTING THE SOIL LIQUEFACTION CAUSED BY MEINONG EARTHQUAKE IN TAINAN CITY, TAIWAN

2016 ◽  
Author(s):  
Chih-Heng Lu ◽  
◽  
Chuen-Fa Ni ◽  
Chung-Pai Chang ◽  
Jiun-Yee Yen
Keyword(s):  
Soil Liquefaction ◽  
Tainan City

scholarly journals Calibration of Finn Model and UBCSAND Model for Simplified Liquefaction Analysis Procedures

2021 ◽  
Vol 11 (11) ◽  
pp. 5283
Author(s):  
Jui-Ching Chou ◽  
Hsueh-Tusng Yang ◽  
Der-Guey Lin
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Structural Damage ◽  
Simulation Analysis ◽  
Constitutive Models ◽  
Soil Liquefaction ◽  
Analysis Procedure ◽  
Liquefaction Resistance ◽  
Simplified Procedure ◽  
Liquefaction Analysis

Soil-liquefaction-related hazards can damage structures or lead to an extensive loss of life and property. Therefore, the stability and safety of structures against soil liquefaction are essential for evaluation in earthquake design. In practice, the simplified liquefaction analysis procedure associated with numerical simulation analysis is the most used approach for evaluating the behavior of structures or the effectiveness of mitigation plans. First, the occurrence of soil liquefaction is evaluated using the simplified procedure. If soil liquefaction occurs, the resulting structural damage or the following mitigation plan is evaluated using the numerical simulation analysis. Rational and comparable evaluation results between the simplified liquefaction analysis procedure and the numerical simulation analysis are achieved by ensuring that the liquefaction constitutive model used in the numerical simulation has a consistent liquefaction resistance with the simplified liquefaction analysis procedure. In this study, two frequently used liquefaction constitutive models (Finn model and UBCSAND model) were calibrated by fitting the liquefaction triggering curves of most used simplified liquefaction analysis procedures (NCEER, HBF, JRA96, and T-Y procedures) in Taiwan via FLAC program. In addition, the responses of two calibrated models were compared and discussed to provide guidelines for selecting an appropriate liquefaction constitutive model in future projects.

The adoption of ELM to the prediction of soil liquefaction based on CPT

2021 ◽  
Author(s):  
Yong-gang Zhang ◽  
Junbo Qiu ◽  
Yan Zhang ◽  
Yongyao Wei
Keyword(s):  
Soil Liquefaction

scholarly journals Sustainable Measures for Protection of Structures Against Earthquake Induced Liquefaction

2021 ◽  
Author(s):  
Gopal S. P. Madabhushi ◽  
Samy Garcia-Torres
Keyword(s):  
Soil Liquefaction ◽  
Excess Pore Pressure ◽  
Economic Losses ◽  
Element Analysis ◽  
Centrifuge Testing ◽  
Centrifuge Tests ◽  
Liquefiable Soil ◽  
Recent Earthquakes ◽  
Excess Pore Pressures ◽  
Excess Pore

AbstractSoil liquefaction can cause excessive damage to structures as witnessed in many recent earthquakes. The damage to small/medium-sized buildings can lead to excessive death toll and economic losses due to the sheer number of such buildings. Economic and sustainable methods to mitigate liquefaction damage to such buildings are therefore required. In this paper, the use of rubble brick as a material to construct earthquake drains is proposed. The efficacy of these drains to mitigate liquefaction effects was investigated, for the first time to include the effects of the foundations of a structure by using dynamic centrifuge testing. It will be shown that performance of the foundation in terms of its settlement was improved by the rubble brick drains by directly comparing them to the foundation on unimproved, liquefiable ground. The dynamic response in terms of horizontal accelerations and rotations will be compared. The dynamic centrifuge tests also yielded valuable information with regard to the excess pore pressure variation below the foundations both spatially and temporally. Differences of excess pore pressures between the improved and unimproved ground will be compared. Finally, a simplified 3D finite element analysis will be introduced that will be shown to satisfactorily capture the settlement characteristics of the foundation located on liquefiable soil with earthquake drains.

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