摘要
以变形需求作为设计参数,阐明了RC框架结构基于性能的抗震设计方法的基本原理及步骤:利用弹塑性位移谱法求解结构的位移与变形需求,在层间位移角满足特定要求后,将梁柱塑性铰区的转动量值作为性能设计的参数,结合预期的性能目标由梁柱性能设计方程进行构件变形能力设计。以一10层框架结构为例,给出了RC框架结构基于性能的抗震设计的完整过程,并通过弹塑性时程分析作了比较验证。结果表明:弹塑性位移谱法求解结构位移需求是一种可为工程接受的、简便有效的方法,通过梁柱性能设计方程对变形能力进行定量设计,可将结构的破损程度控制在预先设定的性能目标范围内。
Basic requirement and design principle of performance-based seismic design is put forward using deformation demands as design parameter. Performance-based seismic method of RC frame structures is illustrated. Firstly, the deformation demands are calculated using inelastic displacement spectra method. After drift demands satisfied specified limitation, plastic hinge rotation demands of beam and column are selected as design parameter. Combining anticipated performance objective, deformation capacity design will be accomplished using performance design equation of RC beam and column. The completed design procedure is exampled with a 10-story structure, and inelastic time history analysis is employed to validate the method. It shows that the inelastic displacement spectra method is efficient to calculate deformation demands, and quantified deformation capacity design will control the damage of structures under expected performance objects.
出处
《四川建筑科学研究》
北大核心
2005年第6期122-127,共6页
Sichuan Building Science
关键词
基于性能的抗震设计方法
钢筋混凝土框架
弹塑性位移谱法
框架梁柱性能设计方程
performance-based seismic design method
RC frame
inelastic displacement spectra method
performance design equation of RC frame beam and column
