约束高强混凝土轴心受压柱的延性

Ductility of High-Strength Concrete Columns Under Axial Load

钢筋混凝土抗震设计中,经济而有效的方法是提高结构及构件吸收地震能量的能力,防止构件出现脆性破坏。混凝土是脆性材料,通过主筋及箍筋的合理配置可以获得足够的延性;资料显示,目前我国抗震规范对混凝土柱所作的规定中,约束钢筋的用量不足于对轴心受压柱提供足够的延性,达不到延性设计的目的,本文就此问题进行了探讨并提出了相应的解决办法。

In antiseismic design, ductility of highstrength concrete columns is the most concerned issue. Test results show that the requirements stated in the national antiseismic design code cannot guarantee reinforced concrete columns, especially highstrength concrete columns, against brittle failure. This paper proposes a reasonable design standard of wellconfined columns to ensure their good ductility.