作　　者： ; ; ; ; ;

机构地区： 惠州学院建筑与土木工程系

出　　处： 《武汉理工大学学报》 2014年第3期94-100,共7页

摘　　要： 为研究新型钢筋网约束混凝土超短构件在低强度混凝土中的局部受压性能,对11个试件进行了轴压试验,探讨了包括破坏形态、极限承载力以及各级裂缝宽度对应荷载在内的局压力学行为。结果表明,试件在新型钢筋网的约束下具有较高的承载力;试件钢筋网外围配置箍筋,可以有效改善其抗裂性能;试件可按高度分为3种破坏形式:侧面无水平贯通裂缝、一条水平贯通裂缝和两条水平贯通裂缝;试件相对高度与其极限承载力成反比,但相对高度大的试件其抗裂性能更好;钢筋网体积配筋率对极限承载力有一定的提高作用,但对抗裂性能没有明显改善作用;试件边长对试件的极限承载力与抗裂性能影响不明显。 To study the compression performance of the super short concrete member with mesh reinforcement, local compression experiments of 11 square specimens were carried out. The failure modes, ultimate capacity, equivalent load- displacement curves,corresponding load of crack and normal service status, were studied respectively. With the confine- ment of mesh reinforcement,the concrete specimens show the higher hearing capacity. With the confinement of stirrup a- round mesh reinforcement,the crack resistances of specimens effectively improve. Three failure modes may occur at the side faces, namely, vertical cracks, vertical cracks with non-through horizontal cracks, as well as vertical crack with through horizontal crack. The height factor is the main influencing factor of the bearing capacity,and the bearing capacity increases with the decrease of height, but higher relative heights of specimens show the higher anti-cracking performance. The volumetric ratio of net reinforcement has a certain effect on the bearing capacity,hut its improvement on the crack re- sistance is not obvious. The width factor has some effect on the bearing capacity, but its influence is not obvious.

关 键 词： 钢筋网 轴压 局部受压 节点

领　　域： [建筑科学]