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(哈爾濱工業(yè)大學(xué)土木工程學(xué)院 150090)
［提要］ 通過對一車輻式預(yù)應(yīng)力索桁架采光頂結(jié)構(gòu)的風(fēng)洞試驗結(jié)果進(jìn)行分析，探討了平均風(fēng)壓和脈動風(fēng)壓的分布規(guī)律及頻譜特性；比較了僅考慮上表面風(fēng)荷載作用和同時考慮上下表面風(fēng)荷載作用對結(jié)構(gòu)的影響，結(jié)果顯示前一種情況對結(jié)構(gòu)更為不利。在此基礎(chǔ)上，進(jìn)一步對結(jié)構(gòu)的風(fēng)致動力特性展開研究，總結(jié)風(fēng)振響應(yīng)規(guī)律，提出相應(yīng)的抗風(fēng)設(shè)計建議。
［關(guān)鍵詞］ 預(yù)應(yīng)力索桁架 玻璃采光頂 風(fēng)荷載 抗風(fēng)設(shè)計
Research on Wind Loads and Windresist Behavior for a Rungshape Prestressed Cable Truss/Sun Ying,Chen Bo,Wu Yue,Shen Shizhao(School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)
Abstract:The analysis of the windtunnel experiment results on a rungshape prestressed  cable truss is carried out.The distribution characteristics for average wind pressure, fluctuating pressure and power spectra density are investigated.The comparison between wind action only on the upper roof surface and both on the upper and lower roof surfaces,shows that the latter condition is more advantageous.Base on these results,windinduce dynamic analysis is carried out,and some advices are pointed out.
Keywords:prestressed cable truss; glass roof; wind characteristics; windresist design