高强混凝土框架结构延性性能数值模拟分析

高强混凝土具有强度高、早强及变形小的优点广泛应用于土木工程结构。然而,在地震地区建筑结构需有较大的变形能力来耗能,其延性差的特点妨碍它更广泛的应用。通过合理地配置钢筋能够有效地提高结构的延性。本文应用DRAIN-2DX程序对一十二层双跨高强混凝土框架结构进行数值模拟分析,分析结果表明它能够很好的模拟此类结构的破坏过程和耗能能力。试验结果表明,此类结构具有较好的延性和耗能能力,抗震性能较好,所提出的方法能够用于地震区高强混凝土框架结构体系之中。

Numerical Simulation Analysis on Ductility Performance of High Strength RC Frame Structure

High-strength concrete has been widely used in civil structures for advantages of higher-strength, earlier curing strength and smaller deformation in applications. However, relatively weak ductility in structures in seismic zones prevented it from further application. The ductility of the structure can be improved by reinforcing reasonably rebars in correct details. A high strength RC frame model with twelve floors and two bays is numerically analyzed by using DRAIN-2DX program. It was shown that this worked fairly well in simulation of the process of structural damage and energy dissipation capacity. It also showed that this kind of frame structure has good ductility and dissipation capacity as well as great seismic performance. The proposed method can be applied in high-strength concrete structures in seismic zone.