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为研究空心钢管混凝土柱中混凝土脱落对结构受力特性的影响,以空心率和轴压比为主要变化参数,共设计了14根空心钢管混凝土侧推试件,包括轴压,偏压和侧推试件,借助摄像功能进行了空心钢管混凝土内部混凝土脱落试验研究。对比分析各试件的破坏特征和荷载-位移骨架曲线,研究了各影响参数对混凝土脱落的影响。试验结果表明:极限荷载时,试件在侧推力作用下易发生脱落,轴压和偏压情况下不考虑混凝土脱落;在侧推力作用下试件中混凝土的脱落对空心钢管混凝土柱的承载能力有影响,空心率和轴压比越大,试件内部混凝土脱落侧推承载力越低。
In order to study the influence of concrete shedding on the structural characteristics of concrete filled steel tubular columns, a total of 14 hollow concrete filled steel tubular test specimens were designed with hollow ratio and axial compression ratio as the main parameters, including axial compression, bias and side Push the test piece, with the help of camera function of hollow concrete filled concrete filled concrete shed test. The failure characteristics and load-displacement skeleton curves of each specimen were compared and analyzed, and the influence of various influence parameters on concrete shedding was studied. The test results show that the specimen will fall off under the action of side thrust under the ultimate load and the concrete will not be taken off under the condition of axial compression and bias. The bearing capacity of the concrete in the specimen under the side thrust force to the concrete filled steel tube column Affected, the greater the hollow rate and axial compression ratio, the lower the concrete carrying capacity of the concrete inside the specimen is.