CAJ | 학술논문

为研究负载作用下纵向侧贴预应力碳纤维布加固钢筋混凝土连续梁的受力性能,制作了4根2跨连续梁,其中1根未加固,3根加固。在加固梁每跨下部纵向侧贴预应力碳纤维布,中间支座上部纵向侧贴非预应力碳纤维布。通过静载试验,得到了连续梁的受弯承载力、变形、裂缝等试验数据。同时,利用非线性有限元分析软件ABAQUS对试验梁进行数值模拟,并与试验结果比较。结果表明：负载作用下纵向侧贴预应力碳纤维布加固钢筋混凝土连续梁能显著提高屈服荷载和极限荷载,预应力碳纤维布的存在提高了连续梁的刚度,减小了连续梁的变形；预应力水平越高,屈服荷载提高和变形减少越明显；利用ABAQUS非线性有限元分析结果与试验结果吻合较好,可为类似的加固设计和试验提供参考。
위연구부재작용하종향측첩예응력탄섬유포가고강근혼응토련속량적수력성능,제작료4근2과련속량,기중1근미가고,3근가고。재가고량매과하부종향측첩예응력탄섬유포,중간지좌상부종향측첩비예응력탄섬유포。통과정재시험,득도료련속량적수만승재력、변형、렬봉등시험수거。동시,이용비선성유한원분석연건ABAQUS대시험량진행수치모의,병여시험결과비교。결과표명：부재작용하종향측첩예응력탄섬유포가고강근혼응토련속량능현저제고굴복하재화겁한하재,예응력탄섬유포적존재제고료련속량적강도,감소료련속량적변형；예응력수평월고,굴복하재제고화변형감소월명현；이용ABAQUS비선성유한원분석결과여시험결과문합교호,가위유사적가고설계화시험제공삼고。
In order to study the mechanical properties of the reinforced concrete continuous beam side-bonded with pre-stressed CFRP sheets on the longitudinal direction under the initial load, four two-span continuous beams including one unreinforced beam and three reinforced beams are investigated. Pre-stressed CFRP sheets were side-bonded on the lower part of the reinforced beam on each cross, and CFRP sheets were side-bonded on the upper part of the middle bearing. The test data such as bearing capacity, deformation and cracks were obtained in every loading stage by the static test. At the same time, the nonlinear finite analysis on the test beams was carried out by ABAQUS software, and the results of finite element analysis were compared with the experiment. The test results show that the yield load and the limit load of the continuous beams side-bonded with pre-stressed CFRP sheet on the longitudinal direction can be improved obviously. In addition, the stiffness of the continuous beam side-bonded with pre-stressed CFRP sheets can be increased, but its deformation can be reduced. The higher the pre-stressed level is, the higher the value of yield load is and the smaller value of the deformation is. The results of nonlinear finite element analysis of the test beams based on the software ABAQUS have good agreement with the test results, so it can provide reference for the similar structure design and test.