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| Abstract: |
| The hybrid structure consisting of castellated composite beam and compound spiral hoop reinforced concrete column take full advantages of steel and concrete material. To popularize the structural form in real conditions, a beam-through-type beam-column connection is proposed. Two 1/2-scaled connection specimens were tested and three-dimensional finite element models of the beam-column connection were set up. The longitudinal reinforcements, concrete beam, and column were simulated by link and solid elements, respectively. The influences of the parameters such as expansion ratio, location of web opening, and original height of steel beam were studied. The results show that connections possessed high initial rigidity. The expansion ratio of steel beam showed more important influence on the connection’s ultimate bearing capacity. For the connection models with steel beam expansion ratio of 1.4, the maximum increment of the ultimate bearing capacity of the connection could reach 28%. In order to prevent the local buckling failure of steel beam from occurring near web opening, the expansion ratio of steel beam should not be greater than 1.3. |
| Key words: castellated composite beam beam-column connection finite element analysis expansion ratio |
| DOI：10.11916/j.issn.1005-9113.20002 |
| Clc Number:TU375.4 |
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| Descriptions in Chinese: |
| 蜂窝组合梁与混凝土柱节点性能的数值模拟 马宏伟，王俊杰，王扬 （华南理工大学 亚热带建筑科学国家重点实验室，广州510640） 中文说明:由蜂窝组合梁和复合螺旋箍筋混凝土柱组成的混合结构能够充分利用钢材和混凝土材料的特性。为了在实际应用中推广这种结构形式，提出一种梁贯通式梁柱节点。通过对两个1/2缩尺节点试件的试验，建立了梁柱节点的三维有限元模型。分别采用连杆单元和实体单元对纵向钢筋、混凝土梁和柱进行模拟。研究了扩张比、腹板开孔位置和钢梁原始高度等参数对钢梁的影响。结果表明，节点具有较高的初始刚度。钢梁的扩张比对节点的极限承载力有较大的影响。对于钢梁扩张比为1.4的节点模型，节点极限承载力的最大增量可达28%。为防止钢梁在腹板开孔附近发生局部屈曲破坏，钢梁的扩张比不应大于1.3。 关键词：蜂窝组合梁；梁柱节点；有限元分析；扩张比 |
