【作者】 罗瑶；

【导师】 姚谦峰； 常鹏；

【作者基本信息】 北京交通大学 ， 结构工程， 2012， 硕士

【摘要】 摘要：密肋壁板结构体系是一种新型住宅结构体系,主要由预制密肋复合墙板和隐型框架及楼板现浇装配而成。作为一种新型节能住宅结构体系,密肋复合墙体有着很好的发展前景。前期,课题组已经针对密肋复合墙板做出了大量的工作,对密肋复合墙板的弹性抗侧刚度计算主要采用的是复合材料的概念。前期对密肋复合墙板进行ANSYS有限元模拟主要采用的是SOLID65与LINK8分别代表混凝土和钢筋来对结构进行分析。该方法能够分析墙体内力和变形发展的过程、裂缝的形成及开展等,但是并不适合于整体建筑结构的计算模拟。且建立一个实体模型的命令流往往要分成了几个部分,如建模、划分网格、建立钢筋模型、建立混凝土模型等,造成输入计算机时十分繁琐,且容易出错。本文从宏观角度出发,采用复合材料分层壳的概念将密肋复合墙板视为由钢筋层、混凝土层、砌块层组成的整体,来建立墙板的有限元计算模型。并将模型与实体模型、试验结果进行了对比,符合较好,证明该模型有一定的可行性。本文所完成的工作主要包括以下方面：1.通过将密肋复合墙板的刚度计算与框架-填充墙结构、剪力墙结构进行对比分析,结合密肋复合墙板由隐形框架及砌块共同组成的特点,提出了将密肋复合墙板的一种新型的弹性刚度计算方法。该方法概念明确,简单,更为适合结构的施工计算。2.分析研究了有限元软件ANSYS提供的各种分层壳单元,根据实际情况选取了合适的单元并进行合理假定。采用分层壳元方法对密肋复合墙板进行弹性抗侧刚度的计算模拟分析,并对影响墙板的各项不同因素进行分析,如混凝土弹性模量、砌块弹性模量、肋柱的数量变化等,从分析结果可以看出,砌块弹性模量的变化对于密肋复合墙板的弹性抗侧刚度影响最大。3.将密肋复合墙板的实体模型与分层壳元法建立的模型进行比对,总结了两者的共同点及不同点,及各自的优势与劣势。其中,相同点主要包括建模过程,使用的材料本构关系,加载方式等；不同点主要有有限元模型的建立方式不同,划分网格不同,分析内容不同等。分层壳元法的模型命令流仅与实体单元某一个块的大小差不多,输入十分方便,调试简便。更多还原

【Abstract】 ABSTRACT:The multi-ribbed slab structure is a kind of new system of residence. It is mainly constructed by the multi-ribbed panel, the frame and the floor. As a new type of structural system, the multi-ribbed composite wall possesses a flourishing development prospect. In early days, a lot of achievements have been done. In the field of calculating the stiffness of the multi-ribbed wall, concept of the composite is mainly used. The numerical simulation of the wall is simulated by SOLID65and LINK8in ANSYS. This method could shows up the internal force, deformation and fissures of wall. But when refers to the simulation of a whole building made by the multi-ribbed wall, this kind of model is too complex for using. The command stream is so long that it has to be divided into parts. And when the command streams are input into computer, it is likely to mix up. From macroscopic angle, a model using the concept of layered shell element is constructed. In this article, results of solid model and layered shell element were compared, which can illustrate that this model is feasible.Works finished in the paper can be listed as follows:1. After research on the comparison among the multi-ribbed wall, infilled frame structure and shear wall, a new method for calculating the lateral stiffness of the multi-ribbed wall is provided. This process is simple and fit for the engineering calculation.2. By studying on the elements provided by ANSYS, appropriate elements was selected combining the real situation. Numerical simulation using layered shell element was carried out on the wall’s lateral stiffness. And various kinds of factors affecting the stiffness were considered. It is clear that the modulus of the block affects the wall’s stiffness mostly.3. Through comparing the wall’s solid model and layered shell element model, similarities and differences, advantages and disadvantages were summarized. And command streams of the layered shell element model are so simple that only equal to one part of the solid model. It is easy to be input into the computer and simple to be debugged.更多还原