【作者】 刘成生；

【导师】 郭成喜；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2010， 硕士

【摘要】 钢结构楼梯作为楼层间的垂直交通工具,是保证建筑物正常使用不可或缺的一部分。因其具有质量轻、便于现场安装和维护等优点,钢楼梯被越来越广泛地应用在工业与民用建筑中。但钢结构楼梯整体刚度不及钢筋混凝土楼梯,在动荷载作用下的动力反应较大,对行人的舒适度影响较大。因此研究钢楼梯在动力荷载作用下的反应机理,了解结构反应最大部位的动力响应具有重要的意义。本文引用国际上最新发表的试验数据,利用大型有限元软件ANSYS建立了楼梯结构的三维有限元模型,并对其进行了自振性能和加速度响应分析。重点分析了边界条件、钢板厚度、钢材刚度以及宽跨比对钢楼梯自振性能的影响,同时也分析了以不同行走频率上下楼梯时钢楼梯的加速度响应。最后利用相关规范评价了钢楼梯的振动舒适度,讨论了各相关规范评价舒适度的合理性,并对实际工程提出了相关建议。更多还原

【Abstract】 Due to light weight, easy field installation and maintenance advantages, the steel staircase was more widely used in industrial and civil buildings. However, the overall stiffness of steel staircase is less than steel reinforced concrete staircase, dynamic response of steel staircase is larger, and the comfort of pedestrian is effected seriously by dynamic response. Therefore, studying the reaction mechanism and dynamic response of steel staircase has great significance.In this article, according to international recently published experimental data, use finite element software ANSYS to establish a three-dimensional finite modal of staircase structure, and a series of vibration performance and the acceleration response are analyzed, including the boundary conditions, plate thickness, stiffness of the steel and width-span ratio on the natural properties. Finally, the vibration comfort is evaluated using relevant specifications, then reasonable of relevant norms for evaluating vibration comfort are discussed. And relevant suggestions were put forward to practical projects.更多还原