基于分灾模式的钢筋混凝土梁抗弯加固性能评估方法  

An Evaluation Method of Flexural Strengthening Performance of Reinforced Concrete Beams Based on Damage-Reduction Mode

作　　者：陈剑波[1] 完海鹰 CHEN Jianbo;WAN Haiying(Nanjing Vocational Institute of Transport Technology,Nanjing 211188,Jiangsu,China;Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]南京交通职业技术学院,江苏南京211188 [2]合肥工业大学,安徽合肥230009

出　　处：《地震工程学报》2019年第5期1147-1154,共8页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51509065);2018年度江苏省高等学校自然科学研究面上项目(18KJB560010);江苏高校“青蓝工程”资助项目(2019-2022)

摘　　要：针对当前钢筋混凝土梁抗弯加固性能评估法未考虑不同建筑结构的抗灾差异,所求得的各项承载力参数不够客观,从而造成评估结果与实际检测结果差异大,评估精度低的问题,提出基于分灾模式的钢筋混凝土梁抗弯加固性能评估方法。计算梁底初始拉应变、梁正截面极限抗弯承载力和钢筋混凝土梁正截面荷载挠度,然后设计分灾模式的钢筋混凝土梁抗弯加固,通过分析载荷与压应变、载荷与挠度以及剪力与位移变化,得到钢筋混凝土梁抗弯加固后各项承载力参数,输入各项梁承载力参数到ANSYS通用程序,利用该程序结合钢筋混凝土梁抗弯加固性能进行评估。通过进行仿真实验,结果表明加入分灾元件的钢筋混凝土梁抗弯加固性能有明显提高。将本文方法评估结果与实验实际评估结果对比可知,提出的评估方法与实际检测结果基本一致,评估精度准确性较高。The current method of evaluating the flexural strengthening performance of reinforced concrete beams does not consider the difference in the disaster resistance of different buildings;thus,the bearing capacity parameters obtained are not objective enough,and as a result,the evaluation results are different from the actual test results and the evaluation accuracy is low.Considering the above,a method based on damagereduction mode is proposed for evaluating the flexural strengthening performance of reinforced concrete beams.The initial tensile strain at the bottom of the beam,the ultimate bending capacity of the normal section of the beam,and the load deflection of the normal section of the reinforced concrete beam are calculated,and the flexural strengthening of the reinforced concrete beam is simulated based on the damagereduction mode.Then the parameters of the bearing capacity of reinforced concrete beams after flexural strengthening are obtained and inputted to general program ANSYS;then,the flexural strengthening performance of reinforced concrete beams is evaluated using the program.The simulation results show that the flexural strengthening performance of reinforced concrete beams with damagereduction elements is significantly improved.Moreover,the evaluation results of this method are basically consistent with the actual evaluation results from experiment,and the evaluation accuracy is high.

关 键 词：分灾模式 钢筋混凝土梁 抗弯 加固 性能 评估方法 

分 类 号：TU375[建筑科学—结构工程]