摘要
首先推导了多自由度体系效应影响强度折减系数的修正系数的计算方法,然后利用严格按我国抗震规范设计的钢筋混凝土框架结构及大量地震动记录研究了多自由度体系效应影响强度折减系数的规律,并给出了相应的实用计算公式。结果表明:结构的周期及延性对修正系数的影响较为显著,且修正系数随周期及延性的增大而增大;场地条件对修正系数的影响可忽略。
A method for calculating the modification coefficients of strength reduction factors for MDOF effect is developed. With the proposed method the modification coefficients of strength reduction factors for MDOF effect are investigated on four different RC frame structures, which were strictly designed according to the Chinese seismic code and subjected to a great number of earthquake ground motions. The statistical analysis result shows that the modification coefficients can be accurately estimated by a simplified expression and the effects of various factors on the modification coefficients can be evaluated. It is concluded that the modification coefficients are primarily affected by the ductility level and periods of structures and they will increase apparently with an increase in the ductility level and structural period. It is also shown that the site conditions only have small effect on the modification coefficients.
出处
《工程力学》
EI
CSCD
北大核心
2006年第11期33-37,69,共6页
Engineering Mechanics
基金
国家自然科学基金(50538050)
高等学校博士学科点专项科研基金(20030213042)
黑龙江省自然科学重点基金资助项目(ZJG03-03)
