【作者】 张岩；

【导师】 陈道政；

【作者基本信息】 合肥工业大学 ， 结构工程， 2008， 硕士

【摘要】 对于底部大空间的高层结构,随着转换梁的跨度增大和上部承托层数增多,转换梁上部结构传递下来的竖向荷载将很大,致使转换大梁截面尺寸过大,使得转换大梁从设计理论上可以实现,但实际工程中却不可行;另一方面转换大梁也不利于管道、设备的布置,不利于该转换层建筑空间的充分利用。因此寻求新的转换形式,对实际工程设计具有现实意义。本文探讨了桁架转换层的墙梁共同作用。主要工作如下:1、通过对单层桁架转换层结构的计算分析,得出通过适当的增加斜杆和调整竖杆间距,可以改变结构的内力分布,以达到结构优化的目的。2、对桁架梁支墙结构的墙梁共同作用做了进一步分析,通过对大量计算结果的归纳、分析,揭示了桁架转换梁托墙结构墙梁共同作用的特征。。3、对桁架转换梁托墙结构墙梁共同作用影响系数进行回归。本文中建立了桁架转换梁托墙结构的两种计算模型,有限元模型和框架模型。采用相同的边界条件,竖向荷载按照等效原则布置（合力、合力矩相等）,比较两种模型内力之间的关系,并定义了共同作用影响系数η₁、η₂,使得两种模型的内力U（有限元模型内力）和U_k（框架模型内力）满足U=η₁η₂U_k。这样在结构设计时,就可以将桁架转换层模型简化为框架结构,进而计算出桁架梁内力,再乘以共同作用影响系数,得出真实的内力（弯矩和剪力）,进行配筋设计及验算。目前,国内关于桁架转换层的研究不是很充分,尤其是对于梁墙共同作用的影响的研究更如此。因此,本文对这个问题应用ANSYS8.1软件进行分析。然而,本文只是在理论上进行了尝试,真正运用到实际工程中,仍然需要大量的理论和试验研究、论证。更多还原

【Abstract】 Concerning the tall building with big space and long span at the bottom, the longer the span of the transfer beams, and the more the floors supported are, the greater the vertical load conveyed from the top, which leads to too much bigger cross section of the transfer beam, and bring terrible influence to the arrangement of electric device and sewer pipes. So, to seek for a new style structure to deal with the problem, is necessary and helpful to the engineering design. The content of the dissertation is as follow:(1) The analysis of monolayer truss transfer structure indicate that through increasing hounds and adjusting space between vertical posts properly, distribution of stress could be changed and then the structure could be optimized.(2) According to the great calculations and analysis, the writer gave some constructive advice about the truss transfer floor of the tall building, which is consistent with the previous research, but more detailed and deep.(3)Through comparing the results of the two mechanics models, the limited element model and the frame model, the common function coefficients between the truss transfer beam and the wall supported, and the simple equations of the internal force about the truss have been obtained.The conclusions in the article can provide important reference to the establishment and modification of the criteria about the truss transfer floor structure, and is useful to the engineering design.更多还原