中国海洋大学体育馆网架的高温力学性能分析

发布时间：2018-05-18 02:19

本文选题：大跨度空间结构 + ANSYS　；参考：《河北工程大学》2013年硕士论文

【摘要】：随着社会经济水平的不断提高，对大跨度空间结构提出了更多的需求，要求建筑造型越来越多样化、多功能化，这为大跨度空间结构提供了丰富的发展空间。空间结构相对于平面结构而言，具有结构刚度大、受力合理、自重轻、用钢量低等优点，而且空间结构形式丰富多彩，外观优美，具有抽象的艺术表现力。如今面对造型比较复杂的大跨空间结构，如何减少火灾危害，成为目前研究的热点问题。本文通过有限元软件ANSYS对中国海洋大学综合体育馆的屋盖结构进行高温下力学性能分析研究，所做的研究工作如下：（1）运用ANSYS软件采用材料非线性有限元理论，重点分析计算了网架局部升温后的力学性能。分析结果表明，高温作用下该网架结构的构件都未屈服，，未产生塑性变形，说明该网架刚度非常大；不同区域在高温作用下，对网架的影响程度不同，对于大型复杂异形网架结构，分区域分析其性能是有必要的；网架的中上区域、左上区域和中间区域，在高温下对网架的影响更加不利，需要加强防火保护措施。（2）总结分析传统钢结构防火设计方法和结构性能化防火设计方法的特点，结合网架结构特点及网架高温下的力学性能分析结果，提出了本网架工程运用结构性能化防火设计方法建立更有针对性、更加经济合理的消防设计方案的新思路。
[Abstract]:With the development of society and economy, more and more demands have been put forward for long-span spatial structures, which require more and more diversified and multi-functional architectural shapes, which provides a rich space for the development of long-span spatial structures. Compared with the plane structure, the spatial structure has the advantages of large stiffness, reasonable force, light weight and low steel, and the space structure has rich and colorful forms, beautiful appearance and abstract artistic expression. Nowadays, how to reduce fire hazards in the face of large span space structures with complex shapes has become a hot issue. In this paper, the mechanical properties of the roof structure of China Ocean University General Gymnasium under high temperature are analyzed by the finite element software ANSYS. The research work is as follows: 1) the mechanical properties of the space grid after local heating are analyzed and calculated by using the material nonlinear finite element theory with ANSYS software. The analysis results show that none of the members of the grid structure has yield and no plastic deformation has occurred under the high temperature, which indicates that the stiffness of the grid structure is very large, and the influence of different regions on the grid structure is different under the action of high temperature. It is necessary to analyze the performance of large complex special-shaped truss structures in different regions, and the upper middle, upper left and middle regions of the grid are more disadvantageous to the grid under high temperature, so it is necessary to strengthen fire protection measures. 2) summing up and analyzing the characteristics of traditional fire resistant design methods and performance-based fire resistant design methods of steel structures, combining with the characteristics of grid structures and the results of mechanical properties analysis under high temperature. This paper puts forward a new idea of establishing a more targeted, more economical and reasonable fire protection design scheme by using the structural performance-based fire prevention design method in the space grid engineering.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU356

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