摘要
单弹簧联结单元法是在实体单元与梁单元的切向设置单弹簧联结单元,模拟钢筋与混凝土切向的相互作用.其切向刚度是由钢筋与混凝土之间的粘结力与滑移量的关系确定,法向变形协调则通过建立法向自由度约束方程保证.在单弹簧联结单元法的基础上,提出了基于钢筋混凝土滑移关系全量曲线的非线性迭代解法,对单弹簧联结单元法进行了改进.在钢筋和混凝土之间直接引入粘结滑移本构关系,由钢筋和混凝土之间的全量滑移量直接求解相互作用力,不仅可以考虑本构关系曲线的下降段,而且受加载方式的影响较小,使得单弹簧联结单元法的求解速度和精度大大提高.
Single spring joint-element method is that single spring joint element is set along the tangent direction of solid element for concrete and beam element for steel bar to simulate the tangential interaction. The tangential stiffness is determined by the relationship of the bond force and slip. The deformation compatibility is ensured by means of that the normal direction degree-of-freedoms for concrete and steel bar are forced to equal. Based on single spring joint-element method, the nonlinear iterative solution is presented by the total curve of the bond stress-slip relationship of the reinforced concrete, which makes the method improved. The solution for bond stress-slip relationship is introduced; and the interaction force is obtained directly, which not only the descending stage of the bond stress-slip relationship could be considered, but also the loading mode has little influence. All these make that the speed and precision of the calculation are improved greatly.
出处
《三峡大学学报（自然科学版）》
CAS
2011年第6期23-26,32,共5页
Journal of China Three Gorges University：Natural Sciences
基金
"十一五"国家科技支撑计划重大项目"南水北调工程若干关键技术研究与应用"(2006BAB04A01)
国家自然科学基金资助项目(51079044)
水利部公益性行业科研专项经费项目(201001035)
江苏高校优势学科建设工程资助项目(水利工程)
关键词
单弹簧联结单元法
粘结滑移
全量曲线
非线性迭代解法
single spring joint-element method
bond-slip
total curve
nonlinear iterative solution
