保证混凝土框架柱延性的设计方法

框架柱是混凝土框架结构的关键构件,其延性很大程度决定了整个结构的延性水平。为探讨如何在设计中保证混凝土框架柱的延性,结合我国混凝土结构抗震设计规范,较为系统地总结了从概念设计、材料选择、确定柱的延性需求及延性水平到构造措施的完整设计方法。研究发现,缜密的概念设计、合理的柱截面尺寸及配箍对保证柱的延性至关重要。

Design Method for Guaranteeing Ductility of Concrete Columns

The columns,whose ductility would determine the ductility of the whole frame structure in a great extent,are the key parts of concrete frames.In order to explore how to guarantee the sufficient ductility for concrete columns through rational designing,and combining with the relevant seismic codes and standards in China,the ductility design method consisting of conceptual design,material selection,determining of ductility demand and ductility level,and details of seismic design is summarized systematically.It is concluded that the meticulous conceptual design,reasonable columns’ sectional dimension and lateral confinement are crucial for guaranteeing the ductility of concrete columns.