【作者】 司春灿；

【导师】 徐善华；

【作者基本信息】 西安建筑科技大学 ， 防灾减灾工程及防护工程， 2011， 硕士

【摘要】 高炉框架、粗煤气系统及旋流除尘器系统是大型炼铁高炉重要组成部分,因工艺要求,高炉框架、粗煤气除尘系统、旋流除尘器系统纵横交错在一起,决定其特有的结构特点和结构形式。高炉框架不仅承受炉顶料仓、受料斗、热风围管等设备的重量,同时还要承受上料系统结构、粗煤气系统传来的荷载,是一个复杂的高耸结构体系。然而长期以来,高炉框架、粗煤气系统、旋流除尘器系统等设计仅仅停留在以经验为主、计算为辅的低层次阶段,许多设计更多地服从于“过去的现实”。分段或平面简化分析结果不能完全反映高炉空间钢结构系统受力特征,高炉空间钢结构系统在地震作用下的动力响应及其破坏机理尚不清楚。论文借助大型SAP2000有限元程序,建立高炉框架、粗煤气系统及旋流除尘器系统三维空间计算模型,对高炉空间钢结构系统进行整体分析,得到其在各种静力荷载作用下的内力和变形,根据《钢结构设计规范》(GB50017-2003)规定的原则,对其杆件的强度和变形进行了分析,给出其设计方法和建议。论文运用三维空间分析模型,对高炉空间钢结构系统动力特性进行了分析,得到其周期、振型等特征参数。运用时程分析法,对高炉空间钢结构系统在多遇地震和罕遇地震作用下的地震反应进行了分析,考察其在非线性动力反应下的抗震性能。分析比较同一水准地震从不同作用方向(X和Y方向)作用高炉空间钢结构系统时,其内力和位移的差异。研究高炉空间钢结构系统内力和变形特征,探讨在地震作用下高炉空间钢结构系统薄弱部位及破坏机理,提出高炉空间结构体系抗震设计方法。论文探讨炉体框架形式(渐进式炉体框架和突变式炉体框架)、炉顶框架形式、柱脚连接方式(铰接和刚接)对结构内力和变形的影响,给出高炉框架荷载取值建议,提出了高炉空间钢结构框架设计建议。更多还原

【Abstract】 Blast furnace frame, crude gas system and the cyclone dust collector system are important parts of large blast furnace, the criss-cross of these systems determine its unique structure features and types due to process requirements. Blast furnace frame is a complex high-rise structure system which bears not only the weight of top storage bin, receiving hopper, hot blast circular duct and other equipment, but also bear the load from the structure of the feeding system and the crude gas the system.However, the blast furnace frame, crude gas system and the cyclone dust collector system design is merely on low-level stage which rely mainly on experience supplemented by calculation for a long time, many designs are more subject to "reality of the past." The section or plane simplified analysis results may not fully reflect the force feature of the spatial steel structure system, the dynamic response and failure mechanism of steel structure system under seismic is not clear.This paper establishes spatial model of blast furnace frame, crude gas system and cyclone dust collector system with SAP2000, then analysis the spatial steel structure system as a whole and obtain its internal force and deformation under various static load. According to Code for design of steel structures (GB50017-2003), this paper also analysis the strength and deformation of the spatial steel structure system , then propose design methods and recommendations.In order to get the natural vibration period, vibration mode and other characteristic parameters of the steel structure system, we make a analysis to dynamic characteristics of spatial steel structure system with spatial model. This paper analysis seismic response of the spatial steel structure system under frequently occurred earthquake and seldomly occurred earthquake by using time history method, then review its earthquake resistant behavior under nonlinear dynamic response. The internal force and displacement differences of the spatial steel structure system under same level of earthquake from different directions (X and Y direction) is analyzed comparatively. The internal forces and deformation characteristics of spatial steel structure system is researched, the weak regions and failure mechanism of the spatial steel structure system under seismic is discussed, seismic design method for spatial steel structure system is proposed.In this paper, the influence of the furnace frame types (progressive frame and mutational frame), furnace roof frame types and column foot connection types (hinged and rigid) to the internal force and deformation of the structure is discussed. Then the suggestion for load value taking and design of the spatial steel structure system is put forward.更多还原