对钢-混凝土组合连接件的试验分析

Testing of Steel-Concrete Composite Connections and Appraisal of Results

对6个全尺寸梁柱节点进行试验研究。钢构件由一个焊接在梁端,与柱翼缘以螺栓连接的钢板组成。所有6个构件的梁截面和混凝土板的尺寸都是统一的。使用了三种类型的柱:光管钢筋柱、部分外包型钢筋柱、全部外包钢筋柱。另外的变量包括楼板中的钢筋面积,柱网中的加劲肋。将从试验中得到的弯矩-转角曲线与分析模型中预测的曲线进行对比。为预测抗弯能力,基于横截面的塑性分析得到一分析模型。同时,用一个简单的弹簧模型分析与钢节点模型组合的楼板,如欧洲规范3附录中提议的那样,该模型可用于评估组合节点的刚度。通常,提出的模型都可以较精确地预测组合节点的抗弯能力。然而,模型可能会高估其转动刚度。

This paper presents results obtained from tests carried on six full-scale composite beam-to-column joints. The steelwork connection consists of a flush end plate welded to the beam end and bolted to the column flange. The steel beam section and concrete slab remained identical for all six specimens. Three types of column are used： bare steel, partially encased and fully encased columns. Other variables include the area of reinforcement in the slab and the presence of stiffeners in the column web. Moment-rotation curves obtained from the tests are compared with those predicted by an analytical model.