ECC面层加固受损砖砌体墙抗震性能试验研究  

EXPERIMENTAL INVESTIGATION ON SEISMIC BEHAVIOR OF DAMAGED BRICK MASONRY WALL STRENGTHENED WITH ECC SPLINT

作　　者：邓明科[1] 樊鑫淼[1] 高晓军[2] 梁兴文[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]西安建筑科技大学建筑设计研究院,陕西西安710055

出　　处：《工程力学》2015年第4期120-129,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51078305;51278402);长江学者和创新团队发展计划项目(PCSIRT)

摘　　要：高延性纤维增强水泥基复合材料(ECC)具有高强度、高延性和受拉应变硬化等特性,在加固工程中具有广泛的应用前景。该文对4片采用ECC面层加固的受损砖墙进行了低周反复荷载试验,并与相关文献中4个试件进行比较,研究了ECC面层加固砖砌体墙的破坏机理、破坏形态、滞回特性和变形能力。结果表明:1)采用ECC面层加固受损砖砌体墙,可显著提高砖墙的变形能力,改善加固后墙体的抗震性能;2)ECC面层对内部砖墙形成良好的约束作用,可显著改善砖墙的脆性破坏模式,是一种有效的砌体结构加固方法;3)改善ECC面层与构造柱之间的粘结性能,保证ECC面层有效传递剪力,对提高加固后墙体的整体性能具有重要作用。该文的研究结果为砌体结构抗震加固提出了一种新方法,具有良好的推广和应用前景。Engineered Cementitious Composites(ECC) is a kind of building material which has characteristic of high strength, high ductility and strain hardening performance in tension. It has wide application prospects in the reinforced engineering. Based on the low-cyclic reversed loading test of 4 damaged brick wall which was strengthened by ECC and the comparison to another 4 specimens from related references, the failure mechanism, failure mode, hysteretic characteristics and deformability of brick walls strengthened by ECC splint were studied. The research shows that: 1) strengthened by ECC splint, the deformability and seismic performance of damaged brick wall are obviously improved; 2) it is an effective method to reinforce masonry structure because ECC splint can restrain its inner brick wall dramatically and provide significant improvement in the brittle fracture of brick wall; 3) improving the bond behavior of ECC splint and constructional column to ensure the shear transfer between them plays an important role in enhancing the overall performance of strengthened brick wall. A new technique of strengthening masonry structure is proposed based on this research, which is epected to have good prospect of promotion and application.

关 键 词：砖墙 高延性纤维增强水泥基复合材料 抗震加固 延性 刚度 

分 类 号：TU364[建筑科学—结构工程] TU352.11