泥石流作用下砌体结构的破坏机理和防倒塌措施

发布时间：2018-04-13 05:20

本文选题：泥石流 + 砌体结构　；参考：《工程力学》2015年08期

【摘要】：为了得到泥石流作用下砌体结构的破坏机理和防倒塌措施,该文利用有限元软件LS-DYNA建立了三维实体模型,分别从结构的整体变形、系统能量、关键点位移和速度等4个方面出发,对泥石流作用下砌体结构的破坏机理进行了研究。根据砌体结构的破坏机理,结合现行规范和工程实践,提出了增大构造柱截面尺寸、减少房屋开间尺寸和降低结构层高等三种防倒塌措施。数值计算结果表明,减少房屋开间尺寸和降低结构层高在一定程度上能够减小构造柱的塑性变形,但是减少程度不大;通过增加构造柱的截面尺寸能够有效地增加砌体结构的抗冲击能力。
[Abstract]:In order to obtain the failure mechanism and anti-collapse measures of masonry structure under the action of debris flow, a three-dimensional solid model is established by using finite element software LS-DYNA.In this paper, the failure mechanism of masonry structure under the action of debris flow is studied from four aspects: displacement and velocity of key points.According to the failure mechanism of masonry structure, combined with the current code and engineering practice, three kinds of anti-collapse measures, such as increasing the section size of the structural column, reducing the size of the open space of the building and reducing the height of the structure floor, are put forward.The numerical results show that the plastic deformation of the structural column can be reduced to a certain extent by reducing the size of the open space of the building and the height of the structure layer, but to a lesser extent.The impact resistance of masonry structure can be effectively increased by increasing the cross section size of the structural column.
【作者单位】：兰州理工大学土木工程学院;北京工业大学城市与工程安全减灾省部共建教育部重点实验室;
【基金】：国家自然科学基金项目(51368039,51478212) 教育部博士点基金(博导类)项目(20136201110003) 甘肃省建设科技攻关项目(JK2012-9) 兰州市科技攻关项目(2013-4-94) 甘肃省科技支撑计划项目(144GKCA032)
【分类号】：TU364;TU312.3

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