摘要
为了评估某旅游景区高耸钢结构螺旋梯,根据勘察,确定螺旋梯下端固定、顶端铰支的边界条件,建立ANSYS数值计算模型。在计算前6阶振型后,采用振型分解反应谱法计算地震作用,并进行结构强度验算,发现螺旋梯在整体稳定性方面较为薄弱;在柱脚抗震强度方面均存在安全隐患。在此基础上提出柱脚加固方案,并对加固方案进行复核。
In order to assess a high-rising steel cockle stairs built in a scenery zone,the calculation model is set up as the ground end fixed and the top end hinge-supported.The ANSYS software is employed to find the first six nature frequencies.Then the respondingspectrum-method based on mode decomposing is used to determine the earthquake actions and their effects.It is found that the global stability of the cockle stairs is quite sharp,and the foot of the structure is not safe enough.Then,the strengthening scheme is put forward,and is checked by stress calculation.
出处
《四川建筑科学研究》
北大核心
2010年第3期90-93,共4页
Sichuan Building Science
关键词
土木工程结构
振型分解反应谱法
振型
螺旋梯
civil engineering structure
responding-spectrum-method based on mode decomposing
mode
cockle stairs
