- 摘 要
-
（1 上海市青浦區(qū)建筑建材業(yè)管理所，上海 201700；2 同濟大學土木工程防災國家重點實驗室，上海 200092）
［摘要］對11種坡度、3種高深比和3種寬深比的總共99個低矮建筑進行了剛性模型測壓風洞試驗，利用試驗結(jié)果并借鑒國外荷載規(guī)范對屋面進行分區(qū)，給出了計算屋面主體結(jié)構(gòu)風荷載各分區(qū)體型系數(shù)。分析了坡度、高深比和寬深比對分區(qū)體型系數(shù)的影響，利用最小二乘法對各分區(qū)體型系數(shù)進行了坡度、高深比和寬深比3參數(shù)的擬合，并將擬合公式計算值和多國規(guī)范給定值進行了比較，驗證了擬合公式的可靠性，同時發(fā)現(xiàn)中國荷載規(guī)范給出的部分區(qū)域的體型系數(shù)值偏小。最后根據(jù)試驗值并參照國外荷載規(guī)范給出了中國荷載規(guī)范中計算屋面主體結(jié)構(gòu)風荷載分區(qū)體型系數(shù)的建議值。
［關鍵詞］屋面分區(qū); 體型系數(shù); 風洞試驗; 擬合; 荷載規(guī)范
中圖分類號：TU312+.1 文獻標識碼：A 文章編號：1002-848X(2014)10-0079-05
Study on regions shape coefficients of roof wind loads of low-rise buildings
Tao Ling1,2, Huang Peng2, Gu Ming2, Quan Yong2
(1 Qingpu District Construction and Building Material Management Station, Shanghai 201700, China; 2 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract: The rigid model pressure measurement tests were conducted on 99 gabled roof lowrise buildings with 11pitches, 3 height-depth ratios and 3 width-depth ratios. According to the test results and the foreign load codes, the surface of the buildings was divided and the region shape coefficients which were used to calculate wind loads of main-wind-force resisting system were given. The effects of pitches, height-depth ratios and width-depth ratios on region shape coefficients were analyzed, and the region shape coefficients were fitted with pitches, height-depth ratios and width-depth ratios by least square method. The computed values using the fitted formulas were compared with load codes of different countries. The reliability of the fitted formulas was verified and some values in Chinese load code tend to be low. Finally the region shape coefficients values which were used to calculate wind loads of main wind-force resisting system in Chinese load code for the design of building structures were suggested in accordance with the test values and foreign load codes.
Keywords: roof region; shape coefficient; wind tunnel test; fitting; load code
*國家科技支撐計劃（2008BAJ08B14）和國家自然科學基金（51178352）聯(lián)合資助。
作者簡介：陶玲，博士,一級注冊結(jié)構(gòu)工程師,Email:tl800425@126.com。
參考文獻
［1］黃鵬，陶玲，全涌，等. 浙江省沿海地區(qū)農(nóng)村房屋抗風情況調(diào)研［J］.災害學，2010,25(4)：90-95.
［2］AIJ recommendations for loads on buildings［S］.Tokyo：Architectural Institute of Japan，2004.
［3］ ASCE/SEI 7-10 Minimum design loads for buildings and other structures［S］. New York：American Society of Civil Engineers, 2010.
［4］AS/NZS 1170.2∶2002 Structural design actions part 2: wind actions［S］. Wellington,New Zealand：Australian/New Zealand Standard, 2002.
［5］ISO 4354:2009 Bases for design of structures, loads, forces and other actions：wind actions on structures［S］.Switzerland：Technical Committee ISO/TC98, Subcommittee SC3, 2009.
［6］GB 50009—2012 建筑結(jié)構(gòu)荷載規(guī)范［S］.北京: 中國建筑工業(yè)出版社, 2012.
［7］陶玲.低矮建筑風荷載的風洞試驗研究［D］.上海：同濟大學，2012.
［8］李慶揚, 王能超, 易大義. 數(shù)值分析［M］.北京：清華大學出版社, 2003.
