钢筋混凝土海洋平台结构受力分析

为完善新型型钢混凝土海洋平台的设计计算理论,本文针对梁内型钢腹板是否穿过节点区的不同情况,参考陆上新型钢筋混凝土建筑的新技术、结合海洋平台的特点,采用变角软化桁架模型,利用平衡条件、协调条件及混凝土软化应力-应变关系,并考虑"扭结"影响(强度弱化)的钢筋应力-应变关系,提出了压弯剪复合受力作用下的框架梁柱节点的受力全过程计算方法.利用该方法对国内外所作的53个框架节点试件进行了受力全过程分析,计算结果与试验结果吻合程度较好,为新型海洋石油平台的研究、设计与施工提供了有益的探索.

Study on mechanical modal of steel reinforced concrete offshore platform

To further improve design and calculating method of steel reinforced concrete offshore platform,aiming at different situations whether steel web is through the area of joint and consulting concerned new technology of steel reinforced concrete construction on land, a calculation method of shear strength of beam-column joint under combined loadings of compression, bending and shear is presented here,which uses the variable-angle softened truss model and the compression-field theory based on the equilibrium conditions, the compatible conditions and the softened stress-strain relationship of concrete and "kink" effect (weak stress-strain relationship of reinforcing steel bar). The theoretical predictions of shear stress are analyzed and compared with test results of 53 SRC beam-column joints.It is shown that the calculation results have good agreement with the test results,thereby bring forward a beneficial method for research,design and constructing of new pattern offshord platform.