- 摘 要
-
（1 哈爾濱工業(yè)大學(xué)建筑設(shè)計(jì)研究院， 哈爾濱 150090; 2 哈爾濱工業(yè)大學(xué)土木工程學(xué)院， 哈爾濱 150090）
［摘要］大跨屋蓋結(jié)構(gòu)的等效靜風(fēng)荷載研究一直有適用性和精確性如何統(tǒng)一的問題。針對此問題提出了一種新的等效靜風(fēng)荷載確定方法，其基本思想是以平均風(fēng)壓和脈動風(fēng)壓為基向量，對結(jié)構(gòu)的極值響應(yīng)利用最小二乘法進(jìn)行擬合。該方法的優(yōu)點(diǎn)是：1）以平均風(fēng)壓及脈動風(fēng)壓為基向量，符合風(fēng)工程的特點(diǎn)，具有明確的物理意義；2）利用該方法獲得的結(jié)果和結(jié)構(gòu)真實(shí)風(fēng)振響應(yīng)吻合良好，精確性高；3）利用該方法可以統(tǒng)計(jì)分析得到不同結(jié)構(gòu)的等效靜風(fēng)荷載系數(shù)，便于工程應(yīng)用。對平板網(wǎng)架、單層球面網(wǎng)殼、單層柱面網(wǎng)殼三種典型屋蓋結(jié)構(gòu)進(jìn)行等效靜風(fēng)荷載分析，給出了可供工程應(yīng)用的等效靜風(fēng)荷載計(jì)算表，表中給出位移、支座反力和桿件應(yīng)力三種等效目標(biāo)下的平均風(fēng)壓系數(shù)和脈動風(fēng)壓系數(shù)。
［關(guān)鍵詞］大跨屋蓋結(jié)構(gòu)； 平均風(fēng)壓； 脈動風(fēng)壓； 等效靜風(fēng)荷載
中圖分類號：TU312+.1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)12-0092-05
Equivalent static wind load based on mean wind pressure and fluctuate wind pressure as base vectors for roof structures
Li Yue1, Wu Yue2, Wang Congfei1
(1 The Architectural Design and Research Institute of HIT, Harbin 150090, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)
Abstract:There is a large gap between the applicability and accuracy of equivalent static wind load of long-span roof structures. To solve the problem, a new method to calculate the equivalent static wind load is presented. The basic idea is based on the mean wind pressure and the fluctuate wind pressure as base vectors, the least squares fit is used to analyze the extreme response of the structure. The advantages of this method are: 1) based on mean wind pressure and fluctuate wind pressure as base vectors, it accords with the characteristics of wind engineering and has clear physical meaning; 2) the results obtained by this method are in good agreement with the real wind-induced vibration response of the structure, and the accuracy is high; 3) the equivalent static wind load coefficients of different structures can be statistically analyzed by using this method, which is convenient for engineering applications. The equivalent static wind loads were analyzed of three typical roof structures, including flat-plate grids, single-layer spherical reticulated shells and single-layer cylindrical reticulated shells. The equivalent static wind load calculation table for engineering applications was given, and mean wind pressure coefficient and fluctuate wind pressure coefficient under three equivalent targets including displacement, bearing reaction and stress in rod were given in the table.
Keywords:long-span roof; mean wind pressure; fluctuate wind pressure; equivalent static wind load
*國家自然科學(xué)基金（51578186）。
作者簡介：李悅，碩士，工程師，Email:lyaimama@163.com。
- 下載地址
-
