SEISMIC RETROFIT OF MASONRY-INFILLED NON-DUCTILE REINFORCED CONCRETE FRAMES USING SPRAYABLE DUCTILE FIBER-REINFORCED CEMENTITIOUS COMPOSITES
Understanding and assessing the seismic performance of masonry infilled reinforced concrete structures has been a significant area of research over the last several decades. There is both field and laboratory evidence that demonstrates the detrimental impact an unreinforced masonry infill imparts on a structure due to its interaction with the bounding frame. There is a current lack of reliable and effective retrofit techniques for this group of structures. A new retrofit technique specifically for unreinforced masonry infills in non-ductile reinforced concrete frames is under investigation and presented here. The technique uses a ductile fiber-reinforced mortar material referred to as Engineered Cementitious Composites, or ECC. A series of experiments have been performed in order to examine the impact of a thin layer of ECC applied on masonry alone as well as when it is applied on a masonry wall bounded by a non-ductile reinforced concrete frame. Results indicate that the ECC can help keep unreinforced masonry walls intact to large lateral drifts, adding significant ductility to the structural system under cyclic loading.
Non-ductile reinforced concrete frames masonry infills walls engineered cementitious composites sprayable retrofit.
M.A. Kyriakides S.L. Billington
Dept. of Civil and Environmental Engineering, Stanford University, California, USA
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）