高桩码头排架计算模型简化条件对横梁弯矩的影响

摘要

Through the theoretical analyses and numerical calculation, among the major simplified conditions which influence beam's flexure moment, because part of negative moment is counteracted by the positive moment generated while the counterforce at the edge of pile cap acts on the beam section at the center of pile cap, the influence of shear deformation is small, the rigid domain is bigger and the width of bearing support is prominent. It is verified that the segmental rigid domain and width of bearing support should be considered in the beam design so as to get more accurate calculation results.%通过理论分析和数值计算发现在影响横梁弯矩的主要简化条件中,剪切变形的影响很小,刚性域的影响较大,而支承宽度的影响最为显著,其主要原因在于桩帽边缘处的反力对处于桩帽中心位置的横梁截面所产生的正弯矩,削减了部分负弯矩的作用.考虑节点刚性域和支承宽度的共同影响,可使横梁设计计算结果更精确.