论文部分内容阅读
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。
Six full-size beam and column joints were tested. The steel component consists of a steel plate welded to the beam end and bolted to the flange of the column. The beam sections of all six components and the size of the concrete slab are uniform. Three types of columns were used: light steel bars, partially outsourced steel columns, and all steel bars. Additional variables include the reinforcement area in the slab and stiffeners in the column net. The bending moment-angle curve obtained from the experiment is compared with the predicted curve in the analysis model. To predict the flexural capacity, an analytical model is derived based on the plasticity analysis of the cross-section. In the meantime, a simple spring model was used to analyze the slab combined with the steel node model, as proposed in the Eurocode 3 Appendix, which can be used to evaluate the stiffness of the combined node. In general, the proposed model can predict the bending resistance of composite nodes more accurately. However, the model may overestimate its rotational stiffness.