Pushover Analysis of Masonry Infilled RC Frame with and without CFRP Strengthening
A large number of earthquake disasters have revealed that the presence of masonry infill wallsobservably reduces the seismic behavior of the RC frames and even leads to the collapse of whole structures.Many exist ing masonry infilled RC frames require strengthening to prevent the damages in the future severe earth quakes.The objective of this study is to investigate the effects of the infill walls on the behaviors of RC frames and to determine the reasonable CFRP rehabilitation schemes for the masonry infilled frames.A 5-sto rey brick masonry infilled RC frame was designed according to the previous codes and three different rehabil itation schemes using CFRP composites which considered the strengthening of beams and columns only were applied.The nonlinear static Pushover analyses were conducted for the bare, masonry infilled and CFRP strengthened infilled frames using Perform-3D software.An equivalent diagonal strut was used to model a wall panel.It was concluded that the infilled masonry walls increased the peak lateral load capacity and ini tial stiffness to 1.7 and 5 times those of bare frame respectively, while it decreased the structural ultimate displacement and maximum inter-storey drift ratio capacity significantly.CFRP rehabilitation schemes im proved performance of the masonry infilled frame in terms of the peak lateral load capacity, maximum inter storey drift ratio capacity and ultimate displacement.For low-rise masonry infilled frames, the columns and beams at the bottom storey retrofitted by CFRP wraps should enhance the seismic performance of the whole frame structure.
Z.Y.Wang X.L.Pan
School of Civil Engineering, Harbin Institute of Technology, Harbin, China
国际会议
哈尔滨
英文
260-267
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）