钢筋混凝土框架夹心节点设计方法

为给出钢筋混凝土框架夹心节点的设计方法，依据试件破坏特征等试验结果提出了验算内容与设计准则，通过对夹心节点抗震性能影响因素的分析及其与传统节点的对比提出了设计参数限值，基于试验试件的承载力并结合非线性有限元模拟的结果提出了核心区承栽力验算公式。结果表明：为达到所需的位移延性并满足承载力要求，需设置剪压比、轴压比、柱梁混凝土强度比、最小配箍量等参数限值约束夹心节点适用范围；通过核心区受压验算、受剪验算保障节点的承载力，必要时可采取适当的加强措施；此外需要采取合理的构造措施避免梁筋过度的粘结退化。

Design Method of Reinforced Concrete Sandwich Beam column Joints

The experimental results of reinforced concrete sandwich beam-column joints were studied intensively and finite element method simulation of such joints were performed for the sake of design method. Basic design criterion and computation contents were provided according to failure mode of specimens and other experimental results. And the limits of parameters were proposed based on the analysis of seismic behavior influence factors and comparison of traditional joints and sandwich joints. Hence, formulas of load resistant capacity were acquired by the results of load resistant capacity of specimens and nonlinear finite element method simulation. It is found that three measures shou for sandwich joints in order to reach demanded ductility and load resistant capability. First d be taken y, several parameters should be limited, including shear-compression ratio, axial load ratio, ratio of beam concrete strength to column concrete strength, and minimal amount of transverse reinforcement of joint. Secondly, shear load resistant capacity and axial compressive load resistant capacity should be computed to ensure load resistant capability of joint, and essential strengthen measures could be applied if necessary. Thirdly, appropriate construction details should be taken to avoid reducing of beam bar anchorage capacity.