【摘要】：隨著輕質和高強材料的廣泛運用、設計方法的不斷進步,施工技術的日趨成熟,大跨度樓板體系在公共建筑及住宅建筑中得到了廣泛的應用,這使得現代建筑的樓板結構跨度越來越大,剛度越來越小。由于跨度的增加以及隔墻等非結構構件的減少,使得大跨度樓蓋的阻尼減小,基頻降低。人行天橋,大型舞廳、展覽館、健身房等人類活動集中的場所,在人行荷載或有節(jié)奏運動的作用下容易產生豎向振動,超過一定限度就會出現振動舒適度問題,引起人們的不安和恐慌。本文以三個工程案例為背景,對大跨度樓板結構的振動舒適度問題作了以下研究:(1)針對大跨度樓板振動舒適度問題,對重要的振動舒適度評價標準和國內外重要的規(guī)范做了簡要介紹,比較了不同標準的優(yōu)點和缺點,選定了適合本文的評價標準,為舒適度的評價提供了理論背景。(2)采用傅里葉級數法,推導了人行荷載前15階諧分量作用下樓板結構豎向振動峰值加速度的計算公式。以交叉路口的人行天橋為工程案例,使用人行荷載前15階諧分量共同作用的方法和現行規(guī)范提供的方法分別計算人行天橋的峰值加速度,將兩種計算方法的結果進行了比較,得到了更適合樓板振動舒適度設計的加速度計算方法,為振動舒適度的計算提出了建議。(3)對某健身房樓蓋進行了舒適度分析,對大跨度樓蓋在有節(jié)奏運動下的振動進行了理論計算。對不滿足振動舒適度要求的樓板,分析了原因,并提出了三種加固方案,將三種加固方案進行了對比分析,提出了可以實現的方法來改善樓板的舒適度,使結構滿足舒適度要求,為結構設計和加固提供了參考。(4)對某五星級酒店項目中主樓與裙房之間的連廊進行了振動舒適度分析。采用大型通用有限元軟件ANSYS進行了有限元模擬計算,對在慢速行走、正常行走、快速行走、慢速跑步、快速跑步以及跳躍等各種荷載作用下的連廊進行了模態(tài)分析以及動力時程分析,對不滿足振動舒適度要求的連廊采用設置調諧質量阻尼器(TMD)以及6種增大梁截面尺寸的方法分別進行加固,將各種加固方法進行了對比,得到最有效的加固減振方案,為振動舒適度設計和結構加固提供了參考。
[Abstract]:With the extensive use of lightweight and high-strength materials, the continuous progress of design methods and the maturation of construction technology, the long-span floor system has been widely used in public buildings and residential buildings. This makes the floor structure of modern buildings more and more span, stiffness is becoming smaller and smaller. Because of the increase of span and the decrease of non-structural members such as partition wall, the damping of long span floor decreases and the frequency of foundation decreases. Pedestrian overpasses, large dance halls, exhibition halls, gymnasiums, and other places where human activities are concentrated tend to produce vertical vibrations under the action of pedestrian loads or rhythmic movements, and if they exceed a certain limit, there will be problems of vibration comfort. Cause people's unease and panic. In this paper, based on three engineering cases, the vibration comfort of long-span floor structure is studied as follows: (1) aiming at the problem of vibration comfort of long-span floor structure, This paper briefly introduces the important evaluation standards of vibration comfort degree and the important norms at home and abroad, compares the advantages and disadvantages of different standards, and selects the evaluation standards suitable for this paper. It provides a theoretical background for the evaluation of comfort degree. (2) the formula for calculating the peak acceleration of vertical vibration of floor structure under the action of 15 harmonic components before walking load is derived by Fourier series method. Taking the pedestrian overpass at the intersection as an engineering case, the peak acceleration of the footbridge is calculated by using the method of the common action of the 15 harmonic components before the pedestrian load and the method provided by the current code, and the results of the two calculation methods are compared. The acceleration calculation method which is more suitable for the design of floor vibration comfort is obtained, and some suggestions for the calculation of vibration comfort are put forward. (3) the comfort degree of a gymnasium floor is analyzed. The vibration of long span floor under rhythmic motion is calculated theoretically. This paper analyzes the reasons for the floor slab which does not meet the requirements of vibration comfort, and puts forward three reinforcement schemes. The comparison and analysis of the three reinforcement schemes are carried out, and the methods that can be realized to improve the comfort degree of the floor slab are put forward. It makes the structure meet the requirements of comfort and provides a reference for structural design and reinforcement. (4) the vibration comfort analysis of the corridor between the main building and the skirt in a five-star hotel project is carried out. The finite element simulation calculation was carried out by using the large and universal finite element software ANSYS, which was used in slow walking, normal walking, fast walking and slow running. Modal analysis and dynamic time history analysis are carried out on the corridors under various loads, such as fast running and jumping. For the corridor which does not meet the requirements of vibration comfort, the tuned mass damper (TMD) and six methods to increase the section size of the beam are used to reinforce the verandah. The comparison of various reinforcement methods is carried out, and the most effective reinforcement and damping scheme is obtained. It provides reference for vibration comfort design and structural reinforcement.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU311.3

【參考文獻】

相關期刊論文 前8條

1 于敬海;李敬明;王銀平;;有節(jié)奏運動荷載作用下大跨度鋼筋混凝土樓蓋豎向振動舒適度分析[J];建筑結構;2013年10期

2 張家華;高承勇;秦衛(wèi)紅;惠卓;林俊軍;;大跨度樓面人群荷載作用響應分析[J];建筑結構學報;2011年11期

3 婁宇;呂佐超;黃健;;樓板振動舒適度控制的標準研究[J];特種結構;2011年03期

4 婁宇;呂佐超;黃健;;人行走引起的樓板振動舒適度設計[J];特種結構;2011年02期

5 李愛群;陳鑫;張志強;;大跨樓蓋結構減振設計與分析[J];建筑結構學報;2010年06期

6 折雄雄;陳雋;;大跨度樓蓋振動舒適度研究綜述[J];結構工程師;2009年06期

7 韓小雷;陳學偉;毛貴牛;鄭宜;季靜;;基于人群行走仿真的樓板振動分析方法及反應譜公式推導[J];建筑科學;2009年05期

8 黃健;王慶揚;婁宇;;基于國內外不同標準的人行天橋舒適度設計研究[J];建筑結構;2008年08期

相關博士學位論文 前2條

1 袁旭斌;人行橋人致振動特性研究[D];同濟大學;2006年

2 宋志剛;基于煩惱率模型的工程結構振動舒適度設計新理論[D];浙江大學;2003年

相關碩士學位論文 前4條

1 王文熙;橋梁TMD系統的參數優(yōu)化與設計[D];湖南大學;2014年

2 吳超;某工程樓板人行振動舒適度研究[D];天津大學;2012年

3 金志堅;人行橋人致振動分析[D];湖南大學;2010年

4 錢曉斌;行走作用下結構振動的響應譜分析方法及人群作用分析[D];浙江大學;2005年

，

本文編號：2248644