大跨度门式刚架斜梁塑性承载力应用研究

发布时间：2018-06-25 22:47

本文选题：大跨度门式刚架 + 斜梁　；参考：《沈阳大学》2017年硕士论文

【摘要】：近几年,经济建设快速发展带来了我国建筑产业的蓬勃进步,轻型钢结构产业优化尤其明显。门式刚架是轻型钢结构之中非常重要的体系,其具有其他体系所无法比拟的众多优势,例如质量轻,制作快捷,安装、施工周期短,建筑风格灵活多变,适合进行大空间设计,节能效果好,性价比高等优势。门式刚架结构的跨度正在不断扩大,对于跨度超过《门式刚架轻型房屋钢结构技术规程》(CECS102:2002)规定的刚架最大跨度36m的门式刚架的设计相关的资料还是很缺乏。因此大跨度门式刚架的研究会对我国钢结构领域发展带来深远影响。通过收集大量与门式刚架相关的资料和文献,进一步研究门式刚架的发展历程、性能特点以及门式刚架的发展前景。收集大量的塑性理论与塑性设计的相关资料以及文献,分析塑性理论的特点、应用条件以及研究现状。本文通过运用PKPM-STS软件模拟分析,对实际工程中跨度为120m的连续大跨度门式刚架斜梁进行塑性承载力研究,其研究主要内容包括:(1)根据受弯构件弯曲应力分析过程、《钢结构设计规范》(GB50017-2003)以及《钢结构设计规范送审稿》(GB50017-201X)等塑性理论资料,深入研究其中弹塑性理论、塑性理论部分条文。(2)运用PKPM软件之中的STS模块,针对跨度为120m的连续大跨度门式刚架的连续斜梁,针对不同截面进行弹塑性承载力分析以及塑性模拟分析并比较。(3)在相同条件下,比较斜梁同一截面弹塑性和塑性的极限承载力,强度应力比δ/f、剪应力比τ/f及整体稳定性应力比。(4)在相同条件下,比较斜梁不同截面塑性极限承载力,强度应力比δ/f、剪应力比τ/f及整体稳定性应力比。(5)比较该连续大跨度门式刚架结构斜梁采用不同截面时的用钢量。通过对跨度为120m的连续大跨度门式刚架斜梁进行塑性及弹塑性设计的比较,分析此类结构进行塑性设计的经济性、实用性及发展空间。
[Abstract]:In recent years, the rapid development of economic construction has brought about the vigorous progress of construction industry in China, especially in the optimization of light steel structure industry. Portal frame is a very important system in light steel structure. It has many advantages that cannot be compared with other systems, such as light quality, quick manufacture, installation, short construction period, flexible architectural style, and suitable for large space design. Good energy-saving effect, high cost-performance and other advantages. The span of portal frame structure is expanding continuously, and there is still a lack of relevant data on the design of portal frame with a maximum span of 36 m over and beyond the technical specification for steel structure of light building with portal frame (CECS 102: 2002). Therefore, the research of large-span portal frame will bring profound influence to the development of steel structure in China. Through collecting a large number of information and literature related to portal frame, the development history, performance characteristics and development prospect of portal frame are further studied. The characteristics, application conditions and research status of plastic theory are analyzed by collecting a large number of relevant materials and literature about plastic theory and plastic design. By using PKPM-STS software, the plastic bearing capacity of 120m continuous large-span oblique beam of portal frame is studied in this paper. The main research contents are as follows: (1) according to the plastic theory data of bending stress analysis process of bending members, Code for Design of Steel structures (GB50017-2003) and draft of Code for Design of Steel structures (GB50017-201X), the elastic-plastic theory is deeply studied. (2) using the STS module of PKPM software, aiming at the continuous oblique beam with 120m span and large span portal frame, The elastic-plastic bearing capacity analysis and plastic simulation analysis of different sections are carried out and compared. (3) under the same conditions, the elastic plastic and plastic ultimate bearing capacity of oblique beams with the same section is compared. The strength stress ratio 未 / f, the shear stress ratio 蟿 / f and the global stability stress ratio. (4) under the same conditions, the plastic ultimate bearing capacity of different sections of oblique beams is compared. The strength stress ratio 未 / f, the shear stress ratio 蟿 / f and the global stability stress ratio are compared. (5) the amount of steel used in this continuous large-span portal frame structure with different sections is compared. By comparing the plastic and elastic-plastic design of the continuous large-span portal frame oblique beam with a span of 120m, this paper analyzes the economy, practicability and development space of the plastic design of this kind of structure.
【学位授予单位】：沈阳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.5

【参考文献】