往复偏心拉压荷载下矩形钢管混凝土柱工作性能试验研究

为研究矩形钢管混凝土柱在往复偏心拉压荷载下的工作性能,进行了4个截面外廓尺寸为130 mm×170 mm的矩形钢管混凝土柱模型在往复偏心拉压荷载下的工作性能试验研究,其中:2个试件的钢板厚度为3 mm,相应配钢率为8.14%,一个试件有栓钉,一个试件无栓钉;2个试件的钢板厚度为1.5 mm,相应配钢率为4.07%,一个试件有栓钉,一个试件无栓钉。通过试验,对比分析了各试件承载力、刚度、延性和破坏特征。研究表明:矩形钢管腔体内设置栓钉可显著提高构件的抗拉和抗压性能;矩形钢管钢板厚度较大的试件对栓钉约束能力较强,可提高栓钉与混凝土的共同工作性能。

Experimental Study on Mechanical Performance of Concrete-Filled Rectangular Steel Tube Columns under Eccentric Cyclic Tension and Compression Load

In order to study the working performance of concrete-filled rectangular steel tube columns under eccentric cyclic tension and compression load,experimental study of four column specimens with the cross section 130 mm×170 mm has been carried out.The reinforcement ratio of two of the specimens is 8.14%and the other two is 4.07%.And the thickness of the steel plate is 3 mm and 1.5 mm,respectively.Studs were set in two of the specimens.There were no studs in the other two specimens.Based on the experiment,the load bearing capacity,stiffness,ductility,and characteristic of failure were analyzed.The study shows that the tension performance and compression performance of concrete-filled rectangular steel tube columns are greatly improved by setting studs inside the steel tube.The studs are restrained more strongly for specimens with thicker steel plate and their working performance between studs and concrete is improved.