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大跨度樓板體系振動(dòng)舒適度研究

發(fā)布時(shí)間:2018-09-18 17:42
【摘要】:隨著輕質(zhì)和高強(qiáng)材料的廣泛運(yùn)用、設(shè)計(jì)方法的不斷進(jìn)步,施工技術(shù)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(yīng)用,這使得現(xiàn)代建筑的樓板結(jié)構(gòu)跨度越來(lái)越大,剛度越來(lái)越小。由于跨度的增加以及隔墻等非結(jié)構(gòu)構(gòu)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(dòng)集中的場(chǎng)所,在人行荷載或有節(jié)奏運(yùn)動(dòng)的作用下容易產(chǎn)生豎向振動(dòng),超過(guò)一定限度就會(huì)出現(xiàn)振動(dòng)舒適度問(wèn)題,引起人們的不安和恐慌。本文以三個(gè)工程案例為背景,對(duì)大跨度樓板結(jié)構(gòu)的振動(dòng)舒適度問(wèn)題作了以下研究:(1)針對(duì)大跨度樓板振動(dòng)舒適度問(wèn)題,對(duì)重要的振動(dòng)舒適度評(píng)價(jià)標(biāo)準(zhǔn)和國(guó)內(nèi)外重要的規(guī)范做了簡(jiǎn)要介紹,比較了不同標(biāo)準(zhǔn)的優(yōu)點(diǎn)和缺點(diǎn),選定了適合本文的評(píng)價(jià)標(biāo)準(zhǔn),為舒適度的評(píng)價(jià)提供了理論背景。(2)采用傅里葉級(jí)數(shù)法,推導(dǎo)了人行荷載前15階諧分量作用下樓板結(jié)構(gòu)豎向振動(dòng)峰值加速度的計(jì)算公式。以交叉路口的人行天橋?yàn)楣こ贪咐?使用人行荷載前15階諧分量共同作用的方法和現(xiàn)行規(guī)范提供的方法分別計(jì)算人行天橋的峰值加速度,將兩種計(jì)算方法的結(jié)果進(jìn)行了比較,得到了更適合樓板振動(dòng)舒適度設(shè)計(jì)的加速度計(jì)算方法,為振動(dòng)舒適度的計(jì)算提出了建議。(3)對(duì)某健身房樓蓋進(jìn)行了舒適度分析,對(duì)大跨度樓蓋在有節(jié)奏運(yùn)動(dòng)下的振動(dòng)進(jìn)行了理論計(jì)算。對(duì)不滿足振動(dòng)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(jìn)行了對(duì)比分析,提出了可以實(shí)現(xiàn)的方法來(lái)改善樓板的舒適度,使結(jié)構(gòu)滿足舒適度要求,為結(jié)構(gòu)設(shè)計(jì)和加固提供了參考。(4)對(duì)某五星級(jí)酒店項(xiàng)目中主樓與裙房之間的連廊進(jìn)行了振動(dòng)舒適度分析。采用大型通用有限元軟件ANSYS進(jìn)行了有限元模擬計(jì)算,對(duì)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(jìn)行了模態(tài)分析以及動(dòng)力時(shí)程分析,對(duì)不滿足振動(dòng)舒適度要求的連廊采用設(shè)置調(diào)諧質(zhì)量阻尼器(TMD)以及6種增大梁截面尺寸的方法分別進(jìn)行加固,將各種加固方法進(jìn)行了對(duì)比,得到最有效的加固減振方案,為振動(dòng)舒適度設(shè)計(jì)和結(jié)構(gòu)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(xué)位授予單位】:湖南大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TU311.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 于敬海;李敬明;王銀平;;有節(jié)奏運(yùn)動(dòng)荷載作用下大跨度鋼筋混凝土樓蓋豎向振動(dòng)舒適度分析[J];建筑結(jié)構(gòu);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(yīng)分析[J];建筑結(jié)構(gòu)學(xué)報(bào);2011年11期

3 婁宇;呂佐超;黃健;;樓板振動(dòng)舒適度控制的標(biāo)準(zhǔn)研究[J];特種結(jié)構(gòu);2011年03期

4 婁宇;呂佐超;黃健;;人行走引起的樓板振動(dòng)舒適度設(shè)計(jì)[J];特種結(jié)構(gòu);2011年02期

5 李愛(ài)群;陳鑫;張志強(qiáng);;大跨樓蓋結(jié)構(gòu)減振設(shè)計(jì)與分析[J];建筑結(jié)構(gòu)學(xué)報(bào);2010年06期

6 折雄雄;陳雋;;大跨度樓蓋振動(dòng)舒適度研究綜述[J];結(jié)構(gòu)工程師;2009年06期

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

8 黃健;王慶揚(yáng);婁宇;;基于國(guó)內(nèi)外不同標(biāo)準(zhǔn)的人行天橋舒適度設(shè)計(jì)研究[J];建筑結(jié)構(gòu);2008年08期

相關(guān)博士學(xué)位論文 前2條

1 袁旭斌;人行橋人致振動(dòng)特性研究[D];同濟(jì)大學(xué);2006年

2 宋志剛;基于煩惱率模型的工程結(jié)構(gòu)振動(dòng)舒適度設(shè)計(jì)新理論[D];浙江大學(xué);2003年

相關(guān)碩士學(xué)位論文 前4條

1 王文熙;橋梁TMD系統(tǒng)的參數(shù)優(yōu)化與設(shè)計(jì)[D];湖南大學(xué);2014年

2 吳超;某工程樓板人行振動(dòng)舒適度研究[D];天津大學(xué);2012年

3 金志堅(jiān);人行橋人致振動(dòng)分析[D];湖南大學(xué);2010年

4 錢曉斌;行走作用下結(jié)構(gòu)振動(dòng)的響應(yīng)譜分析方法及人群作用分析[D];浙江大學(xué);2005年

,

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