【作者】 于正宁；

【导师】 周绪红；

【作者基本信息】 长安大学 ， 结构工程， 2008， 硕士

【摘要】 由冷弯薄壁型钢墙架柱和石膏板、OSB板通过螺钉连接而成的组合墙体,是冷弯薄壁型钢结构住宅体系中主要的竖向承重单元。本文对组合墙体的稳定性能进行了研究,并提出了设计方法。文中采用拟板法,将冷弯薄壁型钢结构住宅组合墙体简化为一个正交异性板肋体系的力学模型,运用截面形心法得到该正交异性板的等效刚度计算公式,并考察了影响等效刚度的各个因素。通过有限元分析,验证了简化计算模型与等效刚度计算公式的正确性。从板的理论出发,推导组合墙体在竖向荷载作用下的稳定性,分析表明其主要与墙体的高厚比有关。文中推导了组合墙体计算高度的确定方法,通过对组合墙体厚度、墙架柱间距、墙面板材、门窗洞口等参数的分析,得到了组合墙体等效弹性模量、承重墙与否及门窗洞口等影响因素对允许高厚比的修正系数,给出了提高组合墙体稳定性的相应措施。本文提出通过高厚比验算来保证组合墙体稳定性的设计方法,并给出设计实例,可供实际工程参考。更多还原

【Abstract】 The assembled wall, which is composed of cold-formed steel wall studs, gypsum board and orient strand board(OSB) fixing with screws, is the main vertical bearing structure in the cold-formed steel residential buildings. In this article the stability of the assembled wall is researched, and a design method is offered.Using the pseudo-plate method, the cold-formed steel stud wall assembly is simplified into a mechanical model of orthotropic plate system. Moreover, the formulas to calculate the equivalent stiffness of the orthotropic plate are presented by using the sectional center method, while the influencing factors of the equivalent stiffness are considered. By using the finite element analysis, the simplified model and the formulas have been verified to be valid.Studying from the theory of the plate, the stability of the wall under vertical load is deduced, and the analysis shows that it is mainly related to the depth-thickness ratio of the wall. The method to determine the calculated height of the wall is derived. By analysing the parameters such as the depth of the wall, the spacing of the studs, the materials of the wall boards and the size of the hole, etc, the correction factors of the allowable depth-thickness ratio which is affected by the equivalent elastic modular, whether it is load bearing wall or not, and the hole size of its door and windows is presented. And the corresponding measure to improve the stability of the assembled walls has also been put forward.The design method to assure the stability of the wall by checking the depth-thickness ratio is presented, also a design example is offered, for the reference in practical projects.更多还原