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（上海聯(lián)創(chuàng)建筑設(shè)計有限公司， 上海 200120）

[摘要]  針對某商業(yè)建筑中的C形箱梁式鋼結(jié)構(gòu)樓梯，建立有限元模型，對單人在樓梯中部原地踏步和多人隊列同步走過樓梯兩種不同工況進行了舒適度分析與評估，結(jié)果表明樓梯滿足中國及美國規(guī)范中的舒適度設(shè)計要求。通過對比不同步頻、不同阻尼比條件下樓梯的峰值加速度響應(yīng)，得出了樓梯舒適度設(shè)計影響因素的變化規(guī)律，提出了一些有利于改善舒適度的思路，所采用的分析方法和建議對此類鋼結(jié)構(gòu)樓梯的舒適度設(shè)計有一定參考價值。

[關(guān)鍵詞]  箱梁式鋼結(jié)構(gòu)樓梯； 人行時程荷載； 振動舒適度

中圖分類號：TU311.3,TU391            文獻標識碼：A         文章編號：

作者簡介：孫振，碩士，工程師，一級注冊結(jié)構(gòu)工程師，Email：sunzhen@udg.com.cn。

Vibration comfort analysis and research of a C-shape box girder staircase under human activity

Sun Zhen

(United Design Group(Shanghai) CO.,LTD. Shanghai 200120,China)

Abstract: The structure finite element model of a C-shape box girder steel staircase in a commercial building was established. For two cases, solo stepping on the middle of the staircase and multi-people queue walking synchronously though the staircase, an analysis and evaluation was made. The results showed that the staircase meet the comfort degree requirements in the structure design standards of China and the United States. From comparing the peak acceleration response of the staircase among the cases of different frequencies and different damping ratios, the changing rule of the influence factors of staircase comfort degree design was concluded. Some ideas to improve the comfort degree were proposed. The methods and suggestions could be referred to the vibration comfort degree design of this kind of steel staircases.

Keywords: box girder steel staircase; time history load of pedestrian; vibration comfort degree.

參  考  文  獻

[1] Steel Design Guide Series 11--Floor Vibrations Due to Human Activity[S]. American Institute of Steel Construction,

2003.

[2] JGJ 3—2010高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程[S].  北京：中國建筑工業(yè)出版社，2011.

[3] ELLIS B R. On the response of long-span floors to walking loads generated by individuals and crowds[J]. The Structural Engineering, 2000, 78(10): 17-25.

[ 4 ] ISO, Bases for design of structures-serviceability of buildings against vibrations, ISO 10137[S]. International Standardization Organization, Geneva, Switzerland, 1992.

[ 5 ] Y. MATSUMOTO, T. NISHIOKA, H. SHIOJIRI, K. Matsuzaki, Dynamic design of footbridges[A]. IABSE Proceedings,1978:17-78.