CAJ | 학술논문

基于13个钢聚氨酯复合管试件的轴压试验，研究聚氨酯在钢复合管中的应用。结果表明，在承受轴向压力下，钢聚氨酯复合管轴压试件破坏时呈多折腰鼓形；钢管发生局部屈曲后，受到聚氨酯材料的约束可以有效延缓试件屈曲发生时间与变形程度；整个加载过程，聚氨酯与钢材的黏结性能良好，两者未发生剥离现象。从试件荷载位移曲线以及试验过程可得：荷载位移曲线一般由弹性、弹塑性、下降和强化阶段组成，表明复合管具有很好的延性与强度储备，能有效抵抗地震等动力荷载的作用。随着 L / D 的减小，试件的极限荷载有增大的趋势，但是其增幅不明显。套箍系数ξ是影响试件性能的重要因素，当ξ值提高时试件承载力会明显提高；反之亦然。
기우13개강취안지복합관시건적축압시험，연구취안지재강복합관중적응용。결과표명，재승수축향압력하，강취안지복합관축압시건파배시정다절요고형；강관발생국부굴곡후，수도취안지재료적약속가이유효연완시건굴곡발생시간여변형정도；정개가재과정，취안지여강재적점결성능량호，량자미발생박리현상。종시건하재위이곡선이급시험과정가득：하재위이곡선일반유탄성、탄소성、하강화강화계단조성，표명복합관구유흔호적연성여강도저비，능유효저항지진등동력하재적작용。수착 L / D 적감소，시건적겁한하재유증대적추세，단시기증폭불명현。투고계수ξ시영향시건성능적중요인소，당ξ치제고시시건승재력회명현제고；반지역연。
Experiments on axial compression behaviors of 13 steel-polyurethane composite tube (SPCT) specimens were conducted to study the application of polyurethane to steel composite tubes. The results show that, under the axial compression, the SPCT was shaped like a bow drum. When local buckling occurred in the steel tube, polyurethane could effectively delay the buckling and deformation. Over the whole loading process, the bonding performance between polyurethane and steel was so good that peeling did not occur. It can be seen from the load-displacement curve and test process that the load-displacement curve is generally composed of elastic, elastic-plastic, descending, and strengthening phases, indicating that the SPCT has sound ductility and a reserve of strength to resist dynamic loads such as earthquakes. With the decrease of L / D, the limiting load of the specimen had an increasing trend, but the trend was not significant. The confining parameter ξ is an important factor influencing the specimen. When ξ increased, the specimen’ s carrying capacity increased significantly, and vice versa.