焊接环式箍筋约束高强混凝土柱开裂裂缝研究

Cracking research of cracks on ring bound stirrups welded high-strength concrete columns

通过对6根焊接环式箍筋高强混凝土的偏心受压柱做单调加载静力试验,改变柱的偏心距,分析了焊接环式箍筋约束混凝土对试件的破坏形态、极限承载力以及开裂过程和裂缝发展规律:应用焊接环式箍筋约束混凝土对偏压柱正截面承载力有很大提高,裂缝发展比较缓慢.这种焊接环式箍筋柱解决了普通非闭合箍筋对混凝土强约束难的问题.

Through 6 welding of stirrups ring of high-strength concrete columns eccentric static loading test,by changing the eccentricity of the column,the damaging of ring welding stirrups confined concrete on the specimen form,the ultimate bearing capacity,as well as cracking process and the law of crack development were analyzed.Conclusions indicate that the welding stirrup confined concrete columns on the bias of flexural capacity has greatly improved and development of cracks slows relatively.welding stirrup column solves the difficulty of the general non-closed stirrups strong constraints on the concrete.