CAJ | 학술논문

基于体外预应力筋应力增量与梁体跨中挠度及混凝土压应变的相关性，提出了盖板体外预应力筋加固的结构计算模型。利用结构变形前后的几何关系，导出了体外预应力筋应力增量的统一表达式，并用室内模型试验证明计算方法的准确性。同时分析了影响体外筋应力增量的力筋面积、预应力值、外荷载形式及既有梁配筋率等参数的敏感性，可为实际工程提供理论支持。
기우체외예응력근응력증량여량체과중뇨도급혼응토압응변적상관성，제출료개판체외예응력근가고적결구계산모형。이용결구변형전후적궤하관계，도출료체외예응력근응력증량적통일표체식，병용실내모형시험증명계산방법적준학성。동시분석료영향체외근응력증량적력근면적、예응력치、외하재형식급기유량배근솔등삼수적민감성，가위실제공정제공이론지지。
Based on the pertinence of the external tendons stress increment,the calculation model of linear type external prestressing slab culvert is proposed.By using the geometrical relationship before and after deformation,a unified expression for external tendons stress increment is solved. The accuracy of the method is demonstrated by a laboratory model test.And the sensitivity analy-sis is performed to study the parameters,such as area of external tendons,effective prestress,load form and reinforcement ratio,thus to provide good technical support for practical engineering re-inforcement.