摘要
通过7片外置薄钢板再生混合墙的拟静力试验研究,分析了废弃混凝土混合比、钢板厚度、轴压比、横隔板间距、高宽比等参数对试件抗震性能的影响。基于新、旧混凝土的组合强度,对试件的水平承载力进行了近似计算分析,并在总用钢量基本一致的情况下,与钢筋混凝土墙的水平承载力进行对比。研究结果表明:废弃混凝土混合比在0～33%之间变化对试件的初始刚度、水平承载力、破坏位移角、耗能能力、滞回曲线形状等影响有限;外置薄钢板再生混合墙的设计轴压比不宜超过0.35;在混合墙厚度与钢板厚度之比高达120的情况下,外置薄钢板再生混合墙具有较稳定的滞回性能和变形能力,其破坏位移角满足现行抗震规范要求;外置薄钢板再生混合墙具有与钢筋混凝土墙相当甚至略高的耗能能力;在总用钢量基本一致的情况下,外置薄钢板再生混合墙具有与钢筋混凝土墙基本相当的水平承载力。
Quasi-static tests of seven double thin skin hybrid walls filled with demolished concrete lumps（DCLs） were conducted,the influences of various parameters（i.e.,mix ratio of demolished concrete,thickness of steel plate,axial load ratio,rib plate spacing,height-width ratio） on the seismic behavior of specimens were investigated.Based on the concept of combined strength of new and old concrete,lateral load carrying capacities of the specimens were calculated approximately,and compared with those of reinforced concrete walls with similar total steel weight.Test results show that：（a） the influences of the mix ratio of demolished concrete within a range of 0~33% on the initial lateral stiffness,lateral load carrying capacity,destructive drift ratio,energy dissipation capacity,and shape of hysteretic curves of the specimens are limited;（b） the axial load ratio of a double thin skin hybrid wall filled with DCLs should be less than 0.35;（c） even the ratio of wall thickness to steel plate thickness is 120,the hysteretic behavior and deformation capacity of a double thin skin hybrid wall filled with DCLs are still well.Its ultimate drift ratio can meet the requirement of the Chinese seismic design code;（d） the energy dissipation capacity of a double thin skin hybrid wall filled with DCLs is similar to or a little larger than that of a reinforced concrete wall;and（e） in the case where the sectional area and total steel weight are close,the lateral load bearing capacity of a double thin skin hybrid wall filled with DCLs is similar to that of a reinforced concrete wall.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2011年第11期116-125,共10页
Journal of Building Structures
基金
国家杰出青年科学基金项目(51025829)
国家重点基础研究发展计划(973计划)项目(2011CB013800)
广东省科技计划项目(2009B060700094)
亚热带建筑科学国家重点实验室项目(2011ZB07)
中央高校基本科研业务费重点项目(2009zz0046)
关键词
薄钢板
废弃混凝土
再生混合墙
拟静力试验
抗震性能
thin steel plate
demolished concrete
hybrid wall filled with demolished concrete lumps
quasi-static test
seismic behavior
