铁丝与铁丝网加强改性生土墙的抗震试验
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摘要
为改善生土墙的抗震性能,采用纵向布置8#线、水平布置铁丝网等加强措施以及采用改性生土坯砌筑墙体,并采用MTS系统对墙体进行了低周往复加载试验.结果表明:试件在墙根部发生局部压坏,随着荷载的不断增加,裂缝逐渐展开并且不断向中间延伸,最终裂缝贯通生土墙破坏.墙体与底梁易发生粘结破坏,在施工中已予以重视.纵向设置8#线、水平设置铁丝网可以提高开裂荷载和极限荷载,且可以提高墙体的整体性,能显著改善墙体变形能力和耗能能力.
In order to improve the seismic behavior of raw-soil wall,such reinforcing measures as arranging the 8#line in the vertical direction and wire mesh in the horizontal direction were adopted,and the modified adobe was utilized to build the wall. The low cyclic loading experiment on the wall was performed with the M TS system. The results show that the root of the wall is partially crushed,and the cracks gradually propagate and continuously extend to the middle with gradually increasing the load. Finally,the cracks penetrate the raw-soil wall,and the wall is destroyed. The cohesiveness failure between the wall and bottom beam occurs easily,and more attention should be paid in the construction. Through arranging the 8#line in the vertical direction and wire mesh in the horizontal direction,the cracking load,ultimate load and even the integrality of the wall can be enhanced. Furthermore,the deformation capacity and energy dissipation ability can be markedly improved.
In order to improve the seismic behavior of raw-soil wall,such reinforcing measures as arranging the 8#line in the vertical direction and wire mesh in the horizontal direction were adopted,and the modified adobe was utilized to build the wall. The low cyclic loading experiment on the wall was performed with the M TS system. The results show that the root of the wall is partially crushed,and the cracks gradually propagate and continuously extend to the middle with gradually increasing the load. Finally,the cracks penetrate the raw-soil wall,and the wall is destroyed. The cohesiveness failure between the wall and bottom beam occurs easily,and more attention should be paid in the construction. Through arranging the 8#line in the vertical direction and wire mesh in the horizontal direction,the cracking load,ultimate load and even the integrality of the wall can be enhanced. Furthermore,the deformation capacity and energy dissipation ability can be markedly improved.
引文
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[3]Matthew R H.Assessing the environmental performance of stabilized rammed earth w alls using a climatic simulation chamber[J].Building and Environment,2007(42):139-145.
[4]Silveira D,Varum H,Costa A.Mechanical properties of adobe bricks in ancient construction[J].Construction and Building M aterial,2011,28(1):36-44.
[5]Silveira D,Varum H,Costa A.Influence of the testing procedures in the mechanical characterization of adobe bricks[J].Construction and Building M aterial,2013,40:719-728.
[6]Burroughs S.Soil property criteria for rammed earth stabilization[J].Journal of M aterials in Civil Engineering,2007,20(3):264-273.
[7]Taylor P,Luther M B.Evaluating rammed earth w alls:a case study[J].Solar Energy,2004(76):79-84.
[8]阿肯江·托呼提,阿里木江·马克苏提,王墩.生土坯建筑抗震加固研究综述[J].新疆大学学报:自然科学版,2008,25(2):142-149.(Akenjiang·Tuohuti,Alimujiang·Makesuti,WANG Dun.Review of researches on the seismic strengthening for adobe buildings[J].Journal of Xinjiang University:Natural Science Edition,2008,25(2):142-149.)
[9]王毅红,李丽,王冲锋.村镇既有生土结构房屋抗震性能现状分析[J].土木工程学报,2010,43(增刊1):462-467.(WANG Yi-hong,LI Li,WANG Chong-feng.Research and analysis on aseismic behavior of existing country raw-soil structure[J].China Civil Engineering Journal,2010,43(Sup1):462-467.)
[10]中国建筑科学研究院.JGJ101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996.(China Academy of Building Research.JGJ101-96Specificating of testing methods for earthquake resistant building[S].Beijing:China Building Industry Press,1996.)
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