【作者】 朱维贤；

【导师】 柳炳康；

【作者基本信息】 合肥工业大学 ， 结构工程， 2003， 硕士

【摘要】 节点区扭转效应是由于梁中纵筋不通过柱截面形心引起的，与梁柱对中节点相比，由于偏心的存在，使得节点核芯区的传力途径和受力机理更为复杂，除受到梁柱传来的轴力、弯矩、剪力的作用外，还要承受偏心引起的扭矩作用。本文通过对不同加腋情况下的八榀“十”字型节点的试验数据进行分析，探讨了不同加荷方式对粘结的影响，得出反复荷载下节点粘结退化的规律，进而找出不同加腋情况下节点核芯区的扭矩，并对节点区进行弹性应力分析，研究扭转效应对柱面斜裂缝走向的影响。最后运用变角空间桁架理论导出压、弯、剪、扭作用下柱截面承载力的计算方法，并对于加腋情况的影响给出了相应的修正。更多还原

【Abstract】 There are torsional effects in the core area of connection since beam-column joints with eccentricity. Compared with centric joints, the force-transfer avenues and mechanical behaviors are more complex. Besides moment, shear force and axial force which transferred from beam and column, torsion acts on the core region of joint. Through processing the experimental data of eight specimens connecting spread-ended beams, the effect of different forcing mode for bond behavior of between steel bars and concrete are discussed. Then the law of bond degrades under unilateralism loading and cyclic reverse loading is proposed. For the different joint connecting spread-ended beams, the torsion acting on interior joint is found. Analyzed the elastic strain of core region of joint, the influences of torsional effects upon the crack of column surface are explored. Finally, based on the theory of changeable angles in the truss, the formula for the section under the combined action of axial press, shear force and bend twisting moment is derived. Considering the effect of spread-ended beams, the formula is modified.更多还原