钢筋混凝土压弯构件低周疲劳损伤的抗力衰减试验研究

通过钢筋混凝土压弯构件的低周疲劳损伤试验，应用损伤力学理论建立构件强度退化计算模型；根据本文有国内已有的压弯构件试验数据统计分析，得到了钢筋混凝土压弯构件循环位移与卸载至零时残余变形的回归公式；给出了强度退化公式中的参数计算方法；在此基础上，计算钢筋混凝土框架地震损伤后的层间剩余强度，为地震后损伤结构修复及抗震能力评定提供理论基础。

Experimental Study on the Resistance Degradation of R.C Compression Flexure Member by Low Cyclic Loading

In this paper,the analysis model of resistance degradation is given based on the concepts of continuum damage mechanics and the damage test of R.C comprossion flexure member under cyclic loading.The relation between residue deformation and cyclic displacement is set up by nonlinear regression analysis using test data.The calculation method of model parameter is established and then the residue storey strenght of structure is calculated.The Theoretical method is given for seismic retrofit of earthquake damaged structures.