不同填充材料生态节能复合墙体破坏模式研究  

Failure modes of ecological energy-saving composite walls with different filled materials

作　　者：姚谦峰[1,2] 侯莉娜[1] 黄炜[1] 席秋红[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构学报》2009年第S2期7-12,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50908188;50878021);国家"十一五"科技支撑计划子课题(2006BAJ04A02-5;2008BAJ08B011-03);陕西省"13115"科技创新工程计划项目(2008ZDKG-76);陕西省教育厅自然科学专项基金项目(09JK523);陕西省重点学科建设专项基金项目(E01001;E01003)

摘　　要：生态节能复合墙体是生态节能复合墙结构的主要受力构件。前期研究表明,生态节能复合墙体的破坏模式主要分为剪切型破坏、弯曲型破坏及剪切滑移型破坏,其中剪切型破坏属于合理的破坏模式。为了详细研究不同填充材料对墙体破坏模式的影响,进行了4榀不同填充材料生态节能复合墙体低周反复加载试验,介绍墙体破坏过程及破坏模式,通过对几种破坏模式下墙体钢筋应变规律的分析,提出生态节能复合墙体破坏模式简化判别标准,并进行验证;采用该标准对比分析不同内填材料对墙体破坏模式的影响。研究结果表明:对于加气混凝土砌块及再生EPS轻骨料混凝土砌块,当其抗压强度低于3.5MPa,弹性模量小于2.4×103MPa时,墙体发生剪切型破坏;对于秸秆纤维水泥基砌块,当其抗压强度低于1.232MPa,弹性模量大于5250MPa时,墙体发生剪切型破坏。The ecological energy-saving composite wall is the main bearing member of the ecological energy-saving composite-wall structures.The previous study dedicates that the failure of the ecological energy-saving composite wall can be classified into shearing failure,bending failure and the shear-slipping failure,among which the shearing failure mode is the reasonable one.In order to study the effects of filler materials on the failure modes of walls,four tests of ecological energy-saving composite walls under low-frequency cyclic loading are carried out.The main failure processes and modes of the walls are presented.By examining the reinforcement contingency change of the wall under different failure modes,the failure mode criterion is proposed,and then it is verified.In addition,the effects of filler materials on the failure mode of the wall are analyzed.The research results show that the air-entraining concrete block and the regeneration EPS lightweight aggregate concrete block fail in shearing mode when the compressive strength is less than or equal to 3.5MPa and the elastic modulus of the filler material is less than or equal to 2.4×103MPa;the straw fiber cement-based block fails in shearing mode when the compressive strength is less than or equal to 1.232MPa and the elastic modulus of the filler material is greater than or equal to 5.25×103MPa.

关 键 词：生态节能复合墙体 填充材料 低周反复试验 破坏模式 

分 类 号：TU399[建筑科学—结构工程]