【摘要】 在国内外文献研究的基础上 ,对钢质近海结构物的修理、加固方法做了较为深入的研究。利用丹麦学者N .S .Ottosen提出的多轴应力状态下混凝土强度理论Ottosen破坏准则 ,建立了钢与混凝土组合结构T型灌浆卡箍管节点的轴向受拉、受压和面内弯矩作用下的非线性有限元计算模型 ,采用分级加载计算分析了相应的极限承载能力 ,并与试验结果进行比较分析。计算结果表明 ,经灌浆卡箍维修后的管节点应力分布、变形和极限承载能力都得到了明显的改善 ,所得结果较好地反映了实际结构的力学特性。更多还原

【Abstract】 Based on overseas and domestic research documents, the technique for repairing and strengthening steel offshore structures has been studied extensively. The concrete strength criterion in multi-spindle stress state proposed by Ottosen is introduced to judge the concrete brick element and to calculate and analyze the limited bearing capacity of the T-shaped grouted clamp tubular node under loads of axial pulling, axial pressing and planar bending moment. Compared with results of the model test, the computation results presented in the paper show evidently that the tubular joint of the T-shaped grouted clamp is improved in stress situation, distortion and ultimate limited bearing capacity.更多还原