论文部分内容阅读
中庭环廊作为商场内的重要交通枢纽,在结构设计时其安全性应得到重视。但由于空间及功能要求,竖向构件布置受限,楼盖常采用悬挑及大跨度梁的布置形式,造成楼盖结构竖向刚度较弱,人群荷载作用下易产生振动,在实际设计中常忽视对其舒适度的考察。采用MIDAS/Gen软件对3个商场中庭环廊模型进行了变形、特征值及时程分析等计算,提取了挠度、自振频率及峰值加速度等分析数据进行讨论。结论表明,商场中庭悬挑环廊自振频率低,采用挠度控制不能保证其舒适度,应对其进行时程加速度验算,并应结合人对加速度的敏感程度对结构设计进行评估。
As an important transportation hub in shopping malls, the Atrium Ring Gallery deserves attention for its safety in structural design. However, due to the space and functional requirements, the layout of vertical components is limited. The cantilever and the arrangement of long-span beams are often used in the floor cover, resulting in a weaker vertical stiffness of the floor structure, which is prone to vibration under crowd loading. Ignore the investigation of their comfort. The MIDAS/Gen software was used to analyze the deformation, eigenvalues, and time-course analysis of the three Atrium orbital corridor models. The analysis data such as deflection, natural frequency and peak acceleration were extracted for discussion. The conclusion shows that the free vibration frequency of arcades in shopping arcades is low, and the flexibility cannot be guaranteed by deflection control. Acceleration of time-course acceleration should be checked, and the structural design should be evaluated in conjunction with human sensitivity to acceleration.