CAJ | 학술논문

基于单剪试验模型，采用割线形式卸载的双线性剪切-滑移本构关系对FRP侧面黏贴抗剪加固混凝土梁的界面破坏过程进行了研究，详细分析了中间裂缝的扩展过程。首先依据裂缝两侧不同的黏结长度分布对裂缝进行详细分类，在此基础上绘制了详细的界面破坏流程图，推导得出了每一类裂缝每一阶段裂缝处的正应力和裂缝宽度的解析表达式，由此得到了界面破坏过程中裂缝处的正应力与裂缝宽度关系曲线，通过构造的有限元模型对文中的算例进行了数值模拟，验证了理论推导的准确性和可靠性。
기우단전시험모형，채용할선형식사재적쌍선성전절-활이본구관계대FRP측면점첩항전가고혼응토량적계면파배과정진행료연구，상세분석료중간렬봉적확전과정。수선의거렬봉량측불동적점결장도분포대렬봉진행상세분류，재차기출상회제료상세적계면파배류정도，추도득출료매일류렬봉매일계단렬봉처적정응력화렬봉관도적해석표체식，유차득도료계면파배과정중렬봉처적정응력여렬봉관도관계곡선，통과구조적유한원모형대문중적산례진행료수치모의，험증료이론추도적준학성화가고성。
Based on a single shear test model,bilinear shear-slip constitutive relationship with secant unloading was employed to study the interface fracture in RC beams shear-strengthened with FRP side strips.The middle crack growth was explained in detail.According to different bond length distribution along each side of the crack,the whole crack was divided into several types.On this basis detailed flow-chart of the interface fracture was drawn.Analytical expressions of normal stress at the crack and crack width for each type of crack at each stage were obtained,then the associated relation curve at the crack during the interface fracture was given.Numerical simulation was implemented through constructed FE model,accuracy reliability of theoretical derivation was proved.