For high-performance concrete (HPC) beams reinforced with hybrid Carbon Fiber Reinforced Polymer/Glass Fiber Reinforced Polymer (CFRP/GFRP) tendons, the nonlinear shell beam mixed element is studied and the whole mechanical process is analyzed. The CFRP/CFRP tendons are simulated with spatial beam element and the HPC beam is modeled with the layered shell element. With the coordination of nodal linear displacement and rotational displacement of CFRP/GFRP tendons element, the contribution of CFRP/GFRP element to stiffness matrix of nonlinear shell beam mixed element is deduced. Then, Jiang’s yielding criterion, Hinton’s crushing criterion, and so on, are used to describe the material nonlinearity of concrete. The new kind of nonlinear shell beam mixed element is achieved and the three-dimensional nonlinear calculation program is developed. The calculative results are consistent with the development trend of test results, which shows the correctness of the nonlinear shell beam mixed element and the reliability of the development program. The mixed element can accurately simulate the geometric configuration of CFRP tendons and realize the tension-compression-bending-shearing performance of CFRP tendons, which is helpful to fully reflect the reinforcement effect of reinforcement in the structure. The computational stiffness is defined and the stiffness degradation experiences three change processes. During the whole processes in the proposed typical load cases, the CFRP/GFRP tendons are still kept in the elastic stages.

对于碳纤维增强复合材料/玻璃纤维增​​强复合材料（CFRP / GFRP）筋增强的高性能混凝土（HPC）梁，研究了非线性壳梁混合单元，并分析了整个力学过程。用空间梁单元模拟CFRP / CFRP筋，并使用分层壳单元对HPC梁建模。通过CFRP / GFRP筋单元节点线性位移和旋转位移的协调，推导了CFRP / GFRP单元对非线性壳梁混合单元刚度矩阵的贡献。然后，使用姜氏屈服准则，欣顿压溃准则等来描述混凝土的材料非线性。实现了一种新型的非线性壳梁混合单元，并建立了三维非线性计算程序。计算结果与试验结果的发展趋势相吻合，表明非线性壳梁混合单元的正确性和开发方案的可靠性。该混合单元可以准确模拟CFRP筋的几何构型，并实现CFRP筋的拉压弯剪性能，有助于充分体现结构中钢筋的加固效果。定义了计算刚度，刚度降低经历了三个变化过程。在建议的典型载荷情况下的整个过程中，CFRP / GFRP筋仍保持在弹性阶段。说明了非线性壳梁混合单元的正确性和开发程序的可靠性。该混合单元可以准确模拟CFRP筋的几何构型，并实现CFRP筋的拉伸-压缩-弯曲-剪切-剪切性能，有助于充分体现结构中钢筋的加固效果。定义了计算刚度，刚度降低经历了三个变化过程。在建议的典型载荷情况下的整个过程中，CFRP / GFRP筋仍保持在弹性阶段。说明了非线性壳梁混合单元的正确性和开发程序的可靠性。该混合单元可以准确模拟CFRP筋的几何构型，并实现CFRP筋的拉伸-压缩-弯曲-剪切-剪切性能，有助于充分体现结构中钢筋的加固效果。定义了计算刚度，刚度降低经历了三个变化过程。在建议的典型载荷情况下的整个过程中，CFRP / GFRP筋仍保持在弹性阶段。这有助于充分反映结构中钢筋的加固效果。定义了计算刚度，刚度降低经历了三个变化过程。在建议的典型载荷情况下的整个过程中，CFRP / GFRP筋仍保持在弹性阶段。这有助于充分反映结构中钢筋的加固效果。定义了计算刚度，刚度下降经历了三个变化过程。在建议的典型载荷情况下的整个过程中，CFRP / GFRP筋仍保持在弹性阶段。