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Analysis of faulting destruction and water supply pipeline damage from the first mainshock of the February 6,2023 Türkiye earthquake doublet

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Earthquake Science 2024年第1期37卷 78-90页

作者： Xiaoqing Fan Libao Zhang Juke Wang Yefei Ren Aiwen Liu Institute of Geophysics China Earthquake AdministrationBeijing 100081China Institute of Engineering Mechanics China Earthquake AdministrationHarbin 150080China

In 2023,two consecutive earthquakes exceeding a magnitude of 7 occurred in Türkiye,causing severe casualties and economic *** damage to critical urban infrastructure and building structures,including highways,railroads,and water supply pipelines,was particularly severe in areas where these structures intersected the seismogenic *** infrastructure projects that traverse active faults are susceptible to the influence of fault movement,pulse velocity,and ground *** this study,we used a unique approach to analyze the acceleration records obtained from the seismic station array(9 strong ground motion stations)located along the East Anatolian fault(the seismogenic fault of the MW7.8 mainshock of the 2023 Türkiye earthquake doublet).The acceleration records were filtered and integrated to obtain the velocity and displacement time *** used the results of an on-site investigation,jointly conducted by China Earthquake Administration and Türkiye’s AFAD,to analyze the distribution of PGA,PGV,and PGD recorded by the strong motion array of the East Anatolian *** found that the maximum horizontal PGA in this earthquake was 3.0 g,and the maximum co-seismic surface displacement caused by the East Anatolian fault rupture was 6.50 *** the fault rupture propagated southwest,the velocity pulse caused by the directional effect of the rupture increased gradually,with the maximum PGA reaching 162.3 cm/*** also discussed the seismic safety of critical infrastructure projects traversing active faults,using two case studies of water supply pipelines in Türkiye that were damaged by *** used a three-dimensional finite element model of the PE(polyethylene)water pipeline at the Islahiye State Hospital and fault displacement observations obtained through on-site investigation to analyze pipeline failure *** further investigated the effect of the fault-crossing angle on seismic safety of a pipeline,based on our analysis and the failure p

关键词： Türkiye earthquake fault displacement near-fault ground motion velocity pulse water supply pipeline

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Estimation of displacement and Extension due to Reverse Drag of Normal faults: Forward Method

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International Journal of Geosciences 2024年第1期15卷 25-39页

作者： Shunshan Xu Angel Francisco Nieto-Samaniego Huilong Xu Susana Alicia Alaniz-Álvarez Universidad Nacional Autónoma de México Centro de Geociencias Apartado Postal 1-742 Querétaro Qro. México South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou China

In the case of reverse drag of normal faulting, the displacement and horizontal extension are determined based on the established equations for the three mechanisms: rigid body, vertical shear and inclined shear. There are three sub-cases of basal detachment for the rigid body model: horizontal detachment, antithetic detachment and synthetic detachment. For the rigid body model, the established equations indicate that the total displacement on the synthetic base (Dt2) is the largest, that on the horizontal base (Dt1) is moderate, and that on the antithetic base (Dt3) is the smallest. On the other hand, the value of (Dt1) is larger than the displacement for the vertical shear (Dt4). The value of (Dt1) is larger than or less than the displacement for the inclined shear (Dt5) depending on the original fault dip δ0, bedding angle θ, and the angle of shear direction β. For all original parameters, the value of Dt5 is less than the value of Dt4. Also, by comparing three rotation mechanisms, we find that the inclined shear produces largest extension, the rigid body model with horizontal detachment produces the smallest extension, and the vertical shear model produces moderate extension.

关键词： fault Rotation fault Drag fault displacement Extension Forward Model

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Evolution of 3D tectonic stress field and fault movement in North China

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Acta Seismologica Sinica(English Edition) 2001年第4期14卷 371-383页

作者：陈连旺陆远忠郭若眉许桂林张杰 Institute of Crustal Dynamics China Seismological Bureau Seismological Bureau of Beijing

Based on data of fault movement surveying, we simulate the evolution process of three dimensional stress field in North China by three dimensional finite element method. Evolutional patterns in one-year time scale from 1986 to 1997 have been illustrated and the evolution characteristics of stress field have been analyzed. In comparison with the seismic activity among that time interval in North China, we have primarily discussed the relationship between the evolution of stress field and seismic activity.

关键词： North China fault displacement tectonic stress field evolutional pattern 3D finite element model

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State of art of seismic design and seismic hazard analysis for oil and gas pipeline system

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Earthquake Science 2010年第3期23卷 259-263页

作者： Aiwen Liu Kun Chen Jian Wu Institute of Geophysics China Earthquake Administration Beijing 100081 China

The purpose of this paper is to adopt the uniform confidence method in both water pipeline design and oil-gas pipeline *** on the importance of pipeline and consequence of its failure,oil and gas pipeline can be classified into three pipe classes,with exceeding probabilities over 50 years of 2%,5% and 10%,***-based design requires more information about ground motion,which should be obtained by evaluating seismic safety for pipeline engineering *** from a city＇s water pipeline network,the long-distance oil and gas pipeline system is a spatially linearly distributed *** the uniform confidence of seismic safety,a long-distance oil and pipeline formed with pump stations and different-class pipe segments should be considered as a whole system when analyzing seismic *** the uncertainty of earthquake magnitude,the design-basis fault displacements corresponding to the different pipeline classes are proposed to improve deterministic seismic hazard analysis（DSHA）.A new empirical relationship between the maximum fault displacement and the surface-wave magnitude is obtained with the supplemented earthquake data in East *** estimation of fault displacement for a refined oil pipeline in Wenchuan MS8.0 earthquake is introduced as an example in this paper.

关键词： seismic hazard assessment oil and gas pipeline fault displacement

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