变幅滞回RC构件耗能能力估算模型修正分析  

Modified analysis of energy dissipation capacity estimation model of RC members under variable amplitude loading

作　　者：胡怡 郭婷 HU Yi;GUO Ting(School of Civil Engineering,Changsha University of Science & Technology,Changsha 410004,China;CCCCSHEC Fourth Engineering Company Ltd.,Wuhu 241000,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410004 [2]中交二航局第四工程有限公司,安徽芜湖241000

出　　处：《河南城建学院学报》2019年第3期9-17,共9页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金项目(50908022)

摘　　要：依据文献[11]提出的变幅滞回RC构件耗能能力估算模型,对PEER数据库中129根弯曲破坏、有轴力矩形截面RC构件进行耗能能力估算,并分析试件设计参数(配筋率、配箍率、轴压比、混凝土强度以及剪跨比)对估算结果的影响规律。分析结果表明:对于上述构件运用估算模型求得的累积耗能估算偏差率较大,并且离散性较大;累积耗能估算偏差率与试件配筋率、轴压比、混凝土强度以及剪跨比相关性尚不明确,而随着配箍率的变化呈现出较为明显的线性关系。通过对配箍率的量化分析,提出了估算模型中特征参数B值的修正公式,较大提高了RC构件耗能能力估算准确度。Based on the energy dissipation capacity estimation model of variable amplitude hysteretic RC members proposed in reference [11], 129 rectangular RC members with bending failure and axial force in PEER database were estimated, and the influence of design parameters (reinforcement ratio, stirrup ratio, axial compression ratio, concrete strength and shear span ratio) on the estimation results was analyzed. The analysis results show that the deviation rate of cumulative energy dissipation estimation obtained by using the estimation model for the above-mentioned components is large and discrete;the correlation between the deviation rate of cumulative energy dissipation estimation and the reinforcement ratio, axial compression ratio, concrete strength and shear span ratio of the specimens is not clear, but with the change of stirrup ratio, there is a more obvious linear relationship. Based on the quantitative analysis of stirrup ratio, a modified formula for estimating attenuation coefficient B in the model is proposed, which greatly improves the accuracy of estimating energy dissipation capacity of RC members.

关 键 词：钢筋混凝土构件 地震能量 加载历程 耗能能力 滞回衰变 

分 类 号：TU375.4[建筑科学—结构工程]