灌孔混凝土与钢筋粘结应力分布的试验研究  

Test and research on distribution of bond stress of reinforcement and grout concrete

作　　者：刘明[1] 黄承逵[1] 程云[2] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连110623 [2]沈阳建筑大学土木工程学院,辽宁沈阳110068

出　　处：《辽宁工程技术大学学报（自然科学版）》2006年第5期705-707,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家十五攻关课题子课题资助项目(2002BA806B-4)

摘　　要：为了研究灌孔混凝土和钢筋的粘结锚固机理及粘结应力分布,通过咬合试验和内贴片试验,分析了内裂缝的发展过程和粘结应力的分布,揭示了灌孔混凝土与钢筋咬合作用传力和混凝土咬合齿被剪断后混凝土与混凝土之间的摩擦传力机理。并以二次曲线模拟粘结应力的缓慢上升段,以椭圆线模拟曲线峰值以后的急剧下降段,采用相对粘结应力形式,确定出粘结应力沿锚长变化的分布函数,为进一步研究灌孔混凝土的粘结机理奠定了基础。To study the interactive mechanism between grout and bar and the distribution of bond stress, this paper introduces the shear-confinement interaction test, internal label measurement of slip and stress observation test. The analysis of cracking and distribution of bond stress, the mechanism of friction between concrete and concrete after the destruction of shear-confinement and the interaction of occlusive gear between grout and bar have been done. It also simulates the slow rise phase of bond stress with second-curve and the rapid fall after peak value with ellipse-curve. By adopting relative bond stress, the distribution function of bond stress along the anchorage length is established which provides test data for application in practice.

关 键 词：配筋砌块砌体 灌孔混凝土 拉拔试验 粘结强度 锚固长度 

分 类 号：TU375.6[建筑科学—结构工程]