腹板V形加劲和开孔冷弯薄壁型钢受弯构件稳定性能研究

发布时间：2018-06-05 02:18

本文选题：腹板V形加劲 + 腹板开孔　；参考：《安徽理工大学》2017年硕士论文

【摘要】：冷弯薄壁型钢的屈曲模式一直是影响构件稳定性和承载力关键因素,随着冷弯型钢的快速发展,冷弯型钢构件相比之前强度更高,厚度更薄,截面形式更加复杂,试件更容易发生屈曲破坏。为了防止构件发生屈曲破坏,实际工程中通常对构件设置加劲,目前关于V形加劲构件的承载力和稳定性的研究较少,因此研究加劲如何影响构件的稳定性和承载力显得十分必要。在冷弯薄壁型钢结构的实际应用中,为了方便生活中的管道、电线等生活设施在钢构件中穿过,通常会在构件上开设孔洞。开孔虽然可以降低建筑物的高度,但是孔洞周围容易产生应力集中构件刚度也随之降低,构件更容易发生屈曲破坏从而丧失承载力,因此本试验将研究开孔对冷弯薄壁型钢构件稳定性和承载力的影响规律。为了研究腹板开孔与V形加劲对冷弯薄壁型钢C型截面受弯构件在纯弯和非纯弯状态下的稳定性和极限承载力的影响规律。本试验设计了四类截面形式的构件,每种截面形式的构件又分为纯弯组和非纯弯组。通过试验来研究不同截面形式受弯构件所发生的屈曲模式,并分析屈曲模式在纯弯和非纯弯状态下对构件抗弯承载力的影响。
[Abstract]:The buckling mode of cold-formed thin-walled steel has always been the key factor affecting the stability and bearing capacity of cold-formed steel. With the rapid development of cold-formed steel, the cold-formed steel member has higher strength, thinner thickness and more complicated section form. The specimens are more prone to buckling failure. In order to prevent the buckling failure of the members, stiffening of the components is usually done in practical engineering. At present, there are few researches on the bearing capacity and stability of the V-shaped stiffening members. Therefore, it is necessary to study how stiffening affects the stability and bearing capacity of members. In the practical application of cold-formed thin-walled steel structure, in order to facilitate the life of the pipeline, the wire and other living facilities pass through the steel member, usually opening holes in the member. Although the opening can reduce the height of the building, the stiffness of the member which is easy to produce stress concentration around the hole is also reduced, and the member is more prone to buckling failure and lose the bearing capacity. Therefore, the effect of opening holes on the stability and bearing capacity of cold-formed thin-walled steel members will be studied in this experiment. In order to study the influence of web opening and V-shaped stiffening on the stability and ultimate bearing capacity of cold-formed thin-walled steel C-section flexural members under pure and non-pure bending conditions. In this experiment, four kinds of cross-section members are designed, each of which is divided into pure bending group and non-pure bending group. The buckling modes of bending members with different cross-section forms are studied by experiments, and the effect of buckling modes on the flexural bearing capacity of members under pure and non-pure bending conditions is analyzed.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1

【相似文献】