大断裂应变PET纤维布和旧牛仔布加固砖墙抗震性能试验研究  

Experimental Study on Seismic Behaviour of Brick Masonry Wall Strengthened with PET and Used Jeans

作　　者：陈溪 许清风 王卓琳 李向民 陈玲珠 

机构地区：[1]上海市建筑科学研究院上海市工程结构安全重点实验室,上海200032

出　　处：《结构工程师》2017年第2期10-18,共9页Structural Engineers

基　　金：上海市优秀技术带头人计划(16XD1422400);上海市科委应用技术开发项目(2014-201)

摘　　要：为提高既有砌体结构无圈梁构造柱砖墙的抗震性能,进行了大断裂应变PET纤维布和旧牛仔布加固砖墙抗震性能的对比试验研究,包括2片未加固砖墙和3片加固砖墙试件。研究结果表明:粘贴大断裂应变纤维布能够显著提高砖墙的抗剪承载力、变形能力、延性、刚度和耗能能力,若加强锚固措施可进一步提高加固效果;PET加固无圈梁构造柱墙体的各项力学性能提高程度均优于PET加固有圈梁构造柱墙体;粘贴旧牛仔布能显著提高无圈梁构造柱砖墙的抗剪承载力、变形能力、刚度和耗能能力。针对试验过程中砖墙的破坏机理,提出了相应的计算方法,其计算结果与试验结果吻合较好。To improve the seismic performance of brick masonry structures without constructional column and ring beam, methods of strengthened brick masonry walls with large rupture strain PET FRP and old jeans were experimentally studied. Five full-size brick masonry walls were designed to investigate the performance of strengthened walls, including two reference walls and three strengthened walls. Experimental results indicated that strengthening brick walls with PET can improve the shear strength, deformability, ductility, stiffness and energy dissipation capacity of walls. Strengthening with PET could have been more effective if anchorage measures were enhanced. All mechanical properties of the PET reinforced unconfined wall exceeded the properties of the strengthened confined wall. Experimental results also indicated that strengthening with old jeans can improve the shear strength, deformability, stiffness and energy dissipation capacity of walls. Finally, the failure mechanism of strengthened tested walls was analyzed, the shear capacity equation was proposed, and the calculation results were in good accordance with test results.

关 键 词：砖墙 加固 聚对苯二甲酸乙二醇酯(PET) 旧牛仔布 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU362