北航青岛校区图书馆悬挂报告厅舒适度设计及参数分析

Comfort design and parameter analysis of hanging lecture hall in library of Beihang Qingdao campus

首先介绍了国内外楼盖舒适度的评价标准。而后依据《建筑楼盖结构振动舒适度技术标准》(JGJ/T 441—2019),对北航青岛校区图书馆悬挂报告厅的吊板的舒适度进行设计,采用MIDAS Gen软件对悬挂报告厅进行舒适度数值模拟分析,包括建模参数取值、吊板基频确定、局部模型正确性验证、荷载工况及计算结果分析。最后对吊板舒适度设计的关键控制参数进行了分析。结果表明,局部模型可取包括吊柱、吊板、吊梁及相邻一跨结构的模型。应以局部模型为基准,通过扫频的方法确定吊板的基频。在进行舒适度设计时,应首先保证吊梁的刚度,再调整吊板的厚度及边梁刚度,以使吊板满足舒适度要求。吊板的峰值加速度随吊板厚度及边梁刚度的增加呈先上升后下降的趋势。因此在设计过程中,不应一味地增加构件的刚度,应根据实际情况进行具体分析后再进行设计。

Firstly, the evaluation standards of floor comfort at home and abroad were introduced. Then, according to the "Technical Standard for Vibration Comfort of Building Floor Structures"(JGJ/T 441—2019), the comfort design of hanging board of hanging lecture hall in the library of Beihang Qingdao campus was conducted, and the MIDAS Gen software was used to carry out the numerical simulation analysis of the hanging lecture hall′s comfort, including the value of modeling parameters and the determination of the basic frequency of the hanging board, local model correctness verification, load conditions and calculation results analysis. Finally, the key control parameters of the comfort design of the hanging board were analyzed. The results show that the local model can be a model including hanging column, hanging plate, hanging beam and adjacent span structure. The local model should be used as a benchmark to determine the fundamental frequency of the hanging plate by means of frequency sweeping. In the comfort design, the rigidity of the hanging beam should be ensured first, and then the thickness of the hanging plate and the rigidity of the side beam should be adjusted to make the hanging plate meet the comfort requirements. The peak acceleration of the hanging plate rises first and then decreases with the increase of the thickness of the hanging plate and the stiffness of the side beam. Therefore, in the design process, the rigidity of the components should not be increased blindly, and the design should be carried out after specific analysis according to the actual situation.