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基于可靠度指標(biāo)的超高層建筑抗風(fēng)舒適度性能評(píng)價(jià)*
余天意1 ,趙 昕2
摘 要

 

(1 同濟(jì)大學(xué)建筑工程系,上海 2000921;2 同濟(jì)大學(xué)建筑設(shè)計(jì)研究(集團(tuán))有限公司,上海 200092)
 
[摘要]  隨著經(jīng)濟(jì)技術(shù)水平的提高,近年來(lái)城市超高層建筑越來(lái)越多,而由于其高柔特性,其對(duì)風(fēng)荷載十分敏感。如何評(píng)估結(jié)構(gòu)在風(fēng)荷而結(jié)構(gòu)在風(fēng)荷載下舒適性能水平十分重要,而由于結(jié)構(gòu)自身與風(fēng)場(chǎng)都具有較大的隨機(jī)性,因此建立基于性能可靠度標(biāo)準(zhǔn)的評(píng)價(jià)也十分必要。針對(duì)此問(wèn)題,本文首先介紹結(jié)構(gòu)抗風(fēng)性能水平的劃分標(biāo)準(zhǔn),然后考查結(jié)構(gòu)在隨機(jī)風(fēng)荷載作用下的動(dòng)力特性。同時(shí)考察結(jié)構(gòu)自身特性與風(fēng)荷載的隨機(jī)特點(diǎn),利用Monte Carlo 法與虛擬激勵(lì)法相結(jié)合,計(jì)算結(jié)構(gòu)抗風(fēng)性能水平的可靠度,并確定結(jié)構(gòu)基于可靠度指標(biāo)的抗風(fēng)舒適度性能。最后,本文引用一個(gè)超高層建筑的算例來(lái)說(shuō)明這種方法的有效性與適用性。
[關(guān)鍵詞]  超高層結(jié)構(gòu);風(fēng)荷載;舒適度性能評(píng)價(jià);可靠度
中圖分類號(hào):TU973.32      文獻(xiàn)標(biāo)識(shí)碼:A      文章編號(hào):1002-848X(2013)S1-0960-04
*上海市科技攻關(guān)計(jì)劃資助(編號(hào):09dz1207704);上海市青年科技啟明星計(jì)劃(跟蹤)資助(編號(hào):11QH1402700)。
通訊作者:余天意,Email: yutianyi1989@126.com。
 
The human comfort performance assessment of super tall buildings under wind load based on the reliability index
Yu Tianyi 1, Zhao Xin 1
(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China;)
 
Abstract: The super high buildings have been constructing massively in modern urban cities in recent years. However, due to the high-rise and flexible of the structure, the super tall building is very sensitive to wind actions. The randomness of the structure properties and the wind has a great influence on the structure, and it is essential to assess the human comfort performance of the building under wind loads based on the reliability index. This paper firstly introduced the human comfort performance level under wind. Then the interaction between the wind load and the structure was considered to calculate the responses of the building under the possible wind. The uncertainty of the structural properties and the wind field were considered. The pseudo-excitation method (PEM) and the Monte Carlo method were adopted in the frequency domain analysis to calculate the reliability of the structure and identify the human comfort performance index of the building. Finally the proposed method is applied to a super tall building to illustrate its effectiveness and applicability.
Keywords: super-tall structure, wind load, human comfort performance assessment, reliability
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