超高层钢筋混凝土结构不同强度等级混凝土梁柱节点的模型实验与有限元分析

本文应用环氧树脂加添加剂的高分子材料模拟不同强度等级的混凝土，用特制的合金材料模拟钢筋，做成带有复杂多层钢筋笼和钢筋箍的梁柱节点模型。在模型内部钢筋和模型表面上粘贴了应变片，进行了模型实验。在考虑复杂钢筋配置的情况下，应用多重多枝子结构方法，在微机上进行了具有十万多个自由度的有限元分析。并将实验与有限元分析结果进行了比较，为梁柱节点的合理设计提供了重要的参考依据。

Experimental and Numerical Analysis for the Stresses in Beam Column Joint of Gap graded Concrete in Supertall Reinforced Concrete Structures

The stress distributions in the beam column joint of supertall reinforced concrete structures are investigated by using an epoxy model and with strain gage technique, where the gap graded concrete parts are simulated by different stuffing epoxies and the multi layer reinforcements are modeled by special alloy materials. By means of a FEM analysis and with a multi level substructuring technique, the stress distributions in the joint are also examined computationally to determine the stress concentration. The two results are compared, and some valuable informations for improving the design of the reinforced concrere beam column joint are obtained.