河北隆尧跨地裂缝建筑物破坏特征分析
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摘要
根据野外调查,隆尧地裂缝具有正断拉张,左旋错动的特征,且造成跨地裂缝建筑物的严重破坏。本文基于非线性有限元法建立三维数值模型,在总结墙体破坏力学机理的基础上,探究地裂缝以不同角度穿越建筑物时墙体的变形特征以及破坏方式。结果表明:当地裂缝以不同角度穿越建筑物时,建筑物"前后"墙体的破坏方式与特征有所不同,具体表现为后墙的破坏范围大于前墙,但其变形破坏滞后于前墙;伴随地裂缝的持续活动,侧墙墙趾处也会出现不同程度的变形影响破坏,且滞后于主墙。随着地裂缝与建筑物夹角的增大,侧墙的变形破坏程度逐渐减小,而主墙的变形破坏越来越集中于二者相交位置。
According to the field investigation,the Longyan ground fissure has the characteristics of positive and negative tensile and left-handed displacement,and causes serious damage to the buildings with transground cracks.Based on the nonlinear finite element method,a three-dimensional numerical model is established,and the deformation characteristics and failure modes of the wall when the ground fissure passes through the building at different angles are studied.The results show that when the ground fissures cross the building at different angles,the damage pattern and characteristics of the"front and rear"walls of the building are different.The concrete damage is greater than the front wall,but its deformation damage lags behind the front wall.Along with the continuous activity of the ground fissure,different degrees of deformation and damage will occur at the toe of the side wall and lag behind the main wall.With the increase of the angle between the ground fissure and the building,the deformation and damage degree of the side wall gradually decreases,and the deformation and damage of the main wall are more and more concentrated on the intersection of the two.
According to the field investigation,the Longyan ground fissure has the characteristics of positive and negative tensile and left-handed displacement,and causes serious damage to the buildings with transground cracks.Based on the nonlinear finite element method,a three-dimensional numerical model is established,and the deformation characteristics and failure modes of the wall when the ground fissure passes through the building at different angles are studied.The results show that when the ground fissures cross the building at different angles,the damage pattern and characteristics of the"front and rear"walls of the building are different.The concrete damage is greater than the front wall,but its deformation damage lags behind the front wall.Along with the continuous activity of the ground fissure,different degrees of deformation and damage will occur at the toe of the side wall and lag behind the main wall.With the increase of the angle between the ground fissure and the building,the deformation and damage degree of the side wall gradually decreases,and the deformation and damage of the main wall are more and more concentrated on the intersection of the two.
引文
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[2]姜凯勇.河北隆尧地裂缝成因机理分析[D].西安:长安大学,2013.JIANG Kaiyong. Analysis on the cause of formation andmechanism about ground Fissure-s of Longyao,HebeiProvince[D]. Xi'an:Chang'an Univers-ity,2013.
[3]李志明.河北邢台柏乡地裂缝成因分析[J].水文地质工程地质,2010,37(2):135-138.LI Zhiming. An analys is of earth fissure at BaixiangCounty,Xing tai City[J]. Hydrogeology&EngineeringGeology,2010,37(2):135-138.
[4]杨为民,张永双,黄晓,等.徐水县北楼村漕河地裂缝形成机理及其演化[J].水文地质工程地质,2014,41(2):122-128.YANG Weimin,ZHANG Yongshuang,HUAGN Xiao,et al. Formation mechanism andevolution of the CaoheRiver earth fissure in the Bailou Village of XushuiCounty[J]. Hydrogeology&Engineering Geology,2014,41(2):122-128.
[5]徐继山,彭建兵,马学军,等.邢台市隆尧地裂缝发育特征及成因分析[J].工程地质学报,2012,20(2):160-169.XU Jishan,PENG Jianbin,MA Xuejun,et al.Characteristic and mechanism analysis of groundfissures in longyao,Xingtai[J]. Journal of EngineeringGeology,2012,20(2):160-169.
[6]马润勇.华北平原典型地裂缝发育地段活动断裂调查与构造应力场数值模拟研究[R].西安:2009.MA Runyong. Active fault investigation and nume-ricalsimulation of tectonic stress field in typical fr-acturedevelopment area of North China Plain[R].Xi'an:2009.
[7]杨培涛.跨地裂缝建筑物基础破坏机理和影响范围的研究[D].西安:长安大学,2015.YANG Peitao. Study onthe failure mechanism of thebuilding foundation across ground fractures and theinfluence scope of ground fractures[D]. Xi'an:Chang'an University,2015.
[8]石玉玲.西安城区地裂缝破裂扩展的数值模拟[J].水文地质工程地质,2008,35(6):56-60.SHI Yuling. Numerical simulation of groundfissure c-racking and extending in Xi'an[J]. Hydrogeology&Engineering Geology,2008,35(6):56-60.
[9]陈立伟.跨地裂缝墙体开裂形态分析[J].工程地质学报,2006,15(3):407-411.CHEN Liwei. Analyses of walls cracking for msoverground fissures[J]. Journal of Engineering Geology,2006,15(3):407-411.
[10]赵忠海.北京顺义木林-塔河一带地裂缝成因及防治措施初探[J].中国地质灾害与防治学报,2001,12(2):26-29.ZHAO Zhonghai. Approach on the origin andprevention measurement of land fracture in Mulin-Tahedistrict of Shunyi county of Beijing[J]. The ChineseJournal of Geoloyical Hazard and Control,2001,12(2):26-29.
[11]石玉玲.地裂缝作用下桥梁与房屋基础灾变机理模型试验研究[D].西安:长安大学,2011.SHI Yuling. Study on the base damage mechanics ofbridge and building under ground fissure with la-rgescale tests[D]. Xi'an:Chang'an University,2011.