Liquefaction Hazard Analysis: A Fully Probabilistic Method

2005 ◽  
Author(s):  
Jin-Hung Hwang ◽  
Cheng-Hsing Chen ◽  
C. Hsein Juang
Keyword(s):  
Hazard Analysis ◽  
Probabilistic Method ◽  
Liquefaction Hazard

Probabilistic Liquefaction Hazard Analysis for Four Canadian Cities

2011 ◽  
Vol 101 (1) ◽  
pp. 190-201 ◽  
Author(s):  
K. Goda ◽  
G. M. Atkinson ◽  
J. A. Hunter ◽  
H. Crow ◽  
D. Motazedian
Keyword(s):  
Hazard Analysis ◽  
Liquefaction Hazard

scholarly journals Peak ground acceleration at surface for Mataram city with a return period of 2500 years using probabilistic method

2018 ◽  
Vol 195 ◽  
pp. 03019
Author(s):  
Rian Mahendra Taruna ◽  
Vrieslend Haris Banyunegoro ◽  
Gatut Daniarsyad
Keyword(s):  
Seismic Hazard ◽  
Return Period ◽  
Peak Ground Acceleration ◽  
Subduction Zones ◽  
Amplification Factor ◽  
Hazard Analysis ◽  
Probabilistic Method ◽  
Seismic Zone ◽  
Ground Acceleration ◽  
Back Arc

The Lombok region especially Mataram city, is situated in a very active seismic zone because of the existence of subduction zones and the Flores back arc thrust. Hence, the peak ground acceleration (PGA) at the surface is necessary for seismic design regulation referring to SNI 1726:2012. In this research we conduct a probabilistic seismic hazard analysis to estimate the PGA at the bedrock with a 2% probability of exceedance in 50 years corresponding to the return period of 2500 years. These results are then multiplied by the amplification factor referred from shear wave velocity at 30 m depth (Vs30) and the microtremor method. The result of the analysis may describe the seismic hazard in Mataram city which is important for building codes.

Liquefaction hazard analysis for infrastructure development in gulf of Jakarta

2016 ◽  
Author(s):  
Indra A. Dinata ◽  
Yudi Darlan ◽  
Imam A. Sadisun ◽  
Haris Pindratno ◽  
Agus Saryanto
Keyword(s):  
Hazard Analysis ◽  
Infrastructure Development ◽  
Liquefaction Hazard

scholarly journals Introduction and Application of a Simple Probabilistic Liquefaction Hazard Analysis Program: HAZ45PL Module

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jui-Ching Chou ◽  
Pao-Shan Hsieh ◽  
Po-Shen Lin ◽  
Yin-Tung Yen ◽  
Yu-Hsi Lin
Keyword(s):  
Hazard Analysis ◽  
Probabilistic Approach ◽  
Soil Liquefaction ◽  
Shallow Foundation ◽  
Evaluation Procedure ◽  
Liquefaction Potential ◽  
Probability Map ◽  
Liquefaction Hazard ◽  
Potential Map ◽  
The Government

The 2016 Meinong Earthquake hit southern Taiwan and many shallow foundation structures were damaged due to soil liquefaction. In response, the government initiated an investigation project to construct liquefaction potential maps for metropolitans in Taiwan. These maps were used for the preliminary safety assessment of infrastructures or buildings. However, the constructed liquefaction potential map used the pseudo-probabilistic approach, which has inconsistent return period. To solve the inconsistency, the probabilistic liquefaction hazard analysis (PLHA) was introduced. However, due to its complicated calculation procedure, PLHA is not easy and convenient for engineers to use without a specialized program, such as in Taiwan. Therefore, PLHA is not a popular liquefaction evaluation procedure in practice. This study presents a simple PLHA program, HAZ45PL Module, customized for Taiwan. Sites in Tainan City and Yuanlin City are evaluated using the HAZ45PL Module to obtain the hazard curve and to construct the liquefaction probability map. The liquefaction probability map provides probabilities of different liquefaction potential levels for engineers or owners to assess the performance of an infrastructure or to design a mitigation plan.

scholarly journals A New Approach for Probabilistic Risk Assessment of Ship Collision with Riverside Bridges

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Wei Zhang ◽  
Shuoyu Liu ◽  
Wenwen Luo ◽  
Liping Wang ◽  
Bo Geng ◽  
...  
Keyword(s):  
Hazard Analysis ◽  
Probabilistic Method ◽  
Analysis Model ◽  
Collision Risk ◽  
New Approach ◽  
Probabilistic Distribution ◽  
Collapse Probability ◽  
Element Simulation ◽  
Ship Collision ◽  
Collision Force

The configuration of riverside bridges, such as the spatial distribution, wading status, and ship accessibility of piers, is generally different from river-crossing bridges. Thus, the ship collision risk of riverside bridges cannot be assessed using conventional assessment methods applicable to river-crossing bridges. The aim of this paper is, therefore, to develop a new probabilistic method for assessing the risk of ship collision with riverside bridges. First, a fully probabilistic framework for assessing the ship-bridge collision risk is presented. Second, a new probabilistic hazard analysis model of ship collision with riverside bridges is proposed, based on a combined study of riverside bridge characterization and an improved yaw ship collision model. A simplified empirical model for evaluating ship-bridge collision force is then adopted, and the probabilistic distribution of the collision force is obtained based on Monte Carlo simulation. Furthermore, finite element simulation is conducted to estimate the collapse probability of piers. Finally, the method developed is applied to the probabilistic assessment of ship collision risk with riverside bridges located at Shabin Road, Chongqing, China. The results show that the risk of ship-bridge collision at Shabin Road is low to moderate. The example demonstrated indicates that the methodology introduced in this paper is capable of assessing the ship-bridge collision risk in a concise and rapid way.

Hazard characterization for alternative intensity measures using the total probability theorem

2021 ◽  
pp. 875529302110492
Author(s):  
Michael W Greenfield ◽  
Andrew J Makdisi
Keyword(s):  
Ground Motion ◽  
Hazard Analysis ◽  
Total Probability ◽  
Ground Acceleration ◽  
Intensity Measures ◽  
Hazard Curve ◽  
Cumulative Absolute Velocity ◽  
Liquefaction Hazard ◽  
Hazard Curves ◽  
Total Probability Theorem

Since their inception in the 1980s, simplified procedures for the analysis of liquefaction hazards have typically characterized seismic loading using a combination of peak ground acceleration and earthquake magnitude. However, more recent studies suggest that certain evolutionary intensity measures (IMs) such as Arias intensity or cumulative absolute velocity may be more efficient and sufficient predictors of liquefaction triggering and its consequences. Despite this advantage, widespread hazard characterizations for evolutionary IMs are not yet feasible due to a relatively incomplete representation of the ground motion models (GMMs) needed for probabilistic seismic hazard analysis (PSHA). Without widely available hazard curves for evolutionary IMs, current design codes often rely on spectral targets for ground motion selection and scaling, which are shown in this study to indirectly result in low precision of evolutionary IMs often associated with liquefaction hazards. This study presents a method to calculate hazard curves for arbitrary intensity measures, such as evolutionary IMs for liquefaction hazard analyses, without requiring an existing GMM. The method involves the conversion of a known IM hazard curve into an alternative IM hazard curve using the total probability theorem. The effectiveness of the method is illustrated by comparing hazard curves calculated using the total probability theorem to the results of a PSHA to demonstrate that the proposed method does not result in additional uncertainty under idealized conditions and provides a range of possible hazard values under most practical conditions. The total probability theorem method can be utilized by practitioners and researchers to select ground motion time series that target alternative IMs for liquefaction hazard analyses or other geotechnical applications. This method also allows researchers to investigate the efficiency, sufficiency, and predictability of new, alternative IMs without necessarily requiring GMMs.

Inter-region variability of Robertson and Wride method for liquefaction hazard analysis

2016 ◽  
Vol 203 ◽  
pp. 191-203 ◽  
Author(s):  
J. Zhang ◽  
C.H. Juang ◽  
J.R. Martin ◽  
H.W. Huang
Keyword(s):  
Hazard Analysis ◽  
Liquefaction Hazard
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