一种钢筋混凝土非线性宏观单元--筒体墙单元

高层结构一般都要设置复杂的钢筋混凝土抗震墙,如何模拟这些复杂墙体的力学性能就成为高层结构弹塑性分析的关键.本文在梁柱单元、单片墙单元的基础上提出了一种简体墙单元,并将此单元应用于高层混凝土结构推覆分析中.单元考虑了材料非线性,并采用较为精确的方法考虑了结构的二阶效应.理论与试验结果对比分析表明,简体墙单元具有精度高、计算稳定和自由度少等特点,为复杂体型高层结构的弹塑性分析提供了有力保证.

A reinforced concrete nonlinear macro element:Tube wall element

Complex RC walls are usually set up in tall structures. How to simulate the mechanical behaviors of these walls is the key to elasto-plastic analysis for tall buildings. In this paper, based on beam-column element and single slice wall, a tube wall element is proposed, and is applied to push-over analysis for tall concrete structures. Material nonlinearity is considered and structural second-order effect is correctly taken into account. The comparison of theory and experiment results shows that the element has the characteristics of high accuracy, calculation stability and reduction of the number of DOF. Therefore the tube wall element provides powerful guarantee of elasto-plastic analysis for tall structures with complex type.