取代率对钢筋再生混凝土构件力学性能影响分析  

Influence analysis of recycled coarse aggregate replacement ratio on mechanical behavior of reinforced recycled concrete components

作　　者：陈宗平[1,2] 陈宇良[1] 占东辉[1] 薛建阳 

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西防灾减灾与工程安全重点实验室,南宁530004

出　　处：《建筑结构》2014年第9期60-64,共5页Building Structure

基　　金：国家自然科学基金项目(50908057);"八桂学者"建设工程专项经费;广西自然科学基金项目(2012GXNSFAA053203);广西科技攻关项目(桂科攻12118023-3);广西理工科学实验中心重点项目(LGZX201102)

摘　　要：以取代率为主要变量,设计和制作了18个钢筋再生混凝土试件(其中梁、板、柱各6个),分别进行了受弯、受压等力学性能试验,获取了各种取代率下试件的力学性能指标,并进行对比分析。结果表明:随着取代率的增加,钢筋再生混凝土梁的极限承载力呈下降趋势;钢筋再生混凝土单向板和双向板的开裂荷载均有较大程度的下降;钢筋再生混凝土偏压柱的极限承载力略为下降。综合考虑钢筋再生混凝土构件的力学性能和经济性能,认为当取代率为50%时优于100%时。Taking replacement ratio as the main parameter, 18 reinforced recycled concrete specimens were designed, including 6 beams, 6 slabs and 6 columns. Mechanical properties tests as bending test and compression test were carried on respectively. Then mechanical performance indexes under each replacement ratio were obtained and compared. The research results show that with the increment of the replacement ratio, ultimate bearing capacity of beams decreases. Cracking loads of one-way slabs and two-way slabs decrease greatly. Ultimate bearing capacity of eccentric-loading columns decreases a little. Considering comprehensively the mechanical properties and economic performance index, it is concluded that 50% replacement ratio of reinforced recycled concrete brings good performance which is better than I00% replacement ratio of reinforced concrete.

关 键 词：钢筋再生混凝土 构件 取代率 极限承载力 

分 类 号：TU375[建筑科学—结构工程]