本文關(guān)鍵詞： 高層建筑 風(fēng)洞試驗 等效靜力風(fēng)荷載 動力荷載響應(yīng)相關(guān)法 響應(yīng)譜法 峰值因子 風(fēng)荷載組合系數(shù)　出處：《中國建筑科學(xué)研究院》2016年博士論文　論文類型：學(xué)位論文

【摘要】：隨著我國經(jīng)濟和工程技術(shù)的發(fā)展,在新世紀(jì)的十多年里高層建筑在我國得到了前所未有的發(fā)展。建筑形體、高度的發(fā)展以及城市環(huán)境的變化使得風(fēng)荷載成為高層建筑安全性、舒適性的控制性因素之一。高層建筑風(fēng)效應(yīng)的研究成為工程設(shè)計的必要步驟。本文基于剛性模型同步測壓試驗,對高層建筑風(fēng)荷載的計算理論和方法進行了系統(tǒng)研究,建立了較為完整的高層等效靜力風(fēng)荷載計算和簡化計算的方法體系。主要工作包括：1)研究了典型高層建筑氣動力特征。通過厚寬比1/4～4,高寬比為4-9的10個典型高層建筑的剛性模型同步測壓試驗,分析研究了層風(fēng)力、基底彎矩和扭矩的平均值、均方根值和功率譜的特征,并基于大量高層建筑振型及周期統(tǒng)計研究了氣動力廣義力功率譜及相關(guān)性特征,研究表明矩形截面高層建筑第一、二階橫風(fēng)向廣義力相關(guān)程度較高,且二者功率譜具有很好的一致性。根據(jù)風(fēng)洞測試數(shù)據(jù)擬合了氣動力均值、均方根值及功率譜計算公式,為后續(xù)研究提供數(shù)據(jù)基礎(chǔ)。2)提出了等效靜力風(fēng)荷載計算的動力荷載響應(yīng)相關(guān)法(DLRC)�；贚RC法和等效風(fēng)振力法的思路,推導(dǎo)了DLRC計算公式,并利用DLRC方法,解決了非主軸方向等效目標(biāo)以及多等效目標(biāo)的等效靜力風(fēng)荷載計算問題。通過理論分析和計算表明：與其他計算方法相比,DLRC法適用于三維風(fēng)荷載的等效且計算精度更高。3)改進了規(guī)范順風(fēng)向風(fēng)荷載、橫風(fēng)向風(fēng)荷載計算方法�；贒LRC法,通過增加二階背景風(fēng)荷載的方法改進了規(guī)范順風(fēng)向風(fēng)荷載計算方法,解決了規(guī)范順風(fēng)向風(fēng)荷載對剛性模型基底剪力計算誤差較大的問題；基于數(shù)值積分和DLRC法提出了橫風(fēng)向風(fēng)荷載計算的響應(yīng)譜法,響應(yīng)譜法與地震反應(yīng)譜法類似,在保證橫風(fēng)向荷載精度的同時使橫風(fēng)向風(fēng)荷載概念更清晰,計算更加簡便。4)初步研究了等效靜力風(fēng)荷載的可靠度�；诟怕拭芏鹊恼环纸夥椒ㄑ芯苛朔逯狄蜃拥目煽慷�,并提出了峰值因子計算新方法；基于DLRC法和聯(lián)合概率密度分布函數(shù)提出了三分力風(fēng)荷載組合系數(shù)計算方法,為高層建筑風(fēng)荷載可靠性研究提供了初步理論基礎(chǔ)。
[Abstract]:With the development of economy and engineering technology in our country, high-rise buildings have been developed in our country for more than ten years in the new century. With the development of high altitude and the change of urban environment, wind load becomes the safety of high-rise building. One of the controlling factors of comfort. The study of wind effect of high-rise building becomes a necessary step in engineering design. This paper based on rigid model synchronous pressure test. The theory and method of wind load calculation for high-rise buildings are studied systematically. A complete method system of equivalent static wind load calculation and simplified calculation is established. The main work includes: 1) the aerodynamic characteristics of typical high-rise buildings are studied. The thickness to width ratio of 1 / 4 / 4 is used to study the aerodynamic characteristics of typical high-rise buildings. In this paper, 10 typical high-rise buildings with a aspect ratio of 4-9 are tested by rigid model simultaneously. The characteristics of the average wind force, base bending moment and torque, root mean square value and power spectrum are analyzed. And based on a large number of high-rise building mode and period statistics, the aerodynamic generalized force power spectrum and its correlation characteristics are studied. The results show that the first and second order cross-wind generalized force correlation degree is high. According to the wind tunnel test data, the aerodynamic mean value, root mean square value and power spectrum formula are fitted. The dynamic load response correlation method based on LRC method and equivalent wind force method is proposed to calculate the equivalent static wind load. The formula of DLRC is deduced and the DLRC method is used. The problem of equivalent static wind load in non-spindle direction and multi-equivalent target is solved. The theoretical analysis and calculation show that the method is compared with other methods. The DLRC method is applicable to the equivalent of three-dimensional wind load and has higher accuracy. 3) it improves the calculation method of wind load in the downwind direction and the wind load in the crosswind direction in code. Based on the DLRC method. By adding the second-order background wind load, the calculation method of the normative downwind wind load is improved, which solves the problem that the calculation error of the standard downwind wind load to the rigid model foundation shear force is large. Based on numerical integration and DLRC method, a response spectrum method is proposed to calculate the cross-wind wind load. The response spectrum method is similar to the seismic response spectrum method, which ensures the accuracy of the cross-wind load and makes the concept of cross-wind wind load clearer. The reliability of equivalent static wind load is preliminarily studied. The reliability of peak factor is studied by orthogonal decomposition method based on probability density, and a new method for calculating peak factor is proposed. Based on the DLRC method and the joint probability density distribution function, a method for calculating the combined coefficients of three-point wind loads is proposed, which provides a preliminary theoretical basis for the study of wind load reliability of high-rise buildings.
【學(xué)位授予單位】：中國建筑科學(xué)研究院
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TU973.213
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本文編號：1453449