CAJ | 학술논문

为研究预应力CFRP加固混凝土桥梁的受力性能，以阜新市东环路大桥加固工程为背景，应用预应力CFRP对其进行加固。运用ANSYS软件对6组预应力CFRP加固的混凝土桥梁的受力性能进行了数值模拟，得到的荷载-挠度曲线与理论结果吻合较好，验证了有限元模型的准确性，在此模型基础上对预应力CFRP加固混凝土桥的受力性能进行了非线性分析，研究了预应力CFRP加固中预拉力值大小、粘贴层数对被加固桥梁受弯性能的影响。结果表明，预应力CFRP加固桥梁较非预应力CFRP加固桥梁其屈服荷载与极限荷载提高20％～40％，挠度降低25％～55％，混凝土与CFRP之间剥离的应力产生几率大大减小，有效解决了非预应力CFRP加固梁所产生的应力应变滞后的问题。
위연구예응력CFRP가고혼응토교량적수력성능，이부신시동배로대교가고공정위배경，응용예응력CFRP대기진행가고。운용ANSYS연건대6조예응력CFRP가고적혼응토교량적수력성능진행료수치모의，득도적하재-뇨도곡선여이론결과문합교호，험증료유한원모형적준학성，재차모형기출상대예응력CFRP가고혼응토교적수력성능진행료비선성분석，연구료예응력CFRP가고중예랍력치대소、점첩층수대피가고교량수만성능적영향。결과표명，예응력CFRP가고교량교비예응력CFRP가고교량기굴복하재여겁한하재제고20％～40％，뇨도강저25％～55％，혼응토여CFRP지간박리적응력산생궤솔대대감소，유효해결료비예응력CFRP가고량소산생적응력응변체후적문제。
In order to study the mechanical performance of bridge strengthened with prestressed CFRP, prestressed CFRP was applied to reinforce Fuxin Donghuanlu bridge . The mechanical performance of six bridges strengthened with prestressed CFRP was simulated by ANSYS .The load-deflection curves were in good agreement with the theoretical calculation results , which verified the accuracy of the finite element analysis model .Nonlinear analysis on the mechanical performance of the bridge strengthened with prestressed CFRP was carried out with the finite element model .The influences of pretension and paste layers were investigated .The results indicate that compared with the bridge strengthened with non-prestressed CFRP , the yield load and ultimate load of the bridge strengthened with prestressed CFRP were increased by 20%to 40%,and deflection was reduced by 25%to 55%.The probability of occurrence of peeling stress between CFRP and concrete was great-ly reduced, and the stress hysteresis can be avoided to a certain extent .