地下車庫頂板消防車活荷載的合理取值研究
戴冠民, 田堃
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戴冠民, 田堃(中國海誠工程科技股份有限公司, 上海 200031)［摘要］根據消防車活荷載的作用特征分析指出，該項活荷載應取荷載的偶然組合參與結構構件的承載能力極限狀態(tài)驗算；應取荷載的頻遇組合參與結構構件的正常使用極限狀態(tài)驗算。以常用的柱網尺寸為8.4m×8.4m的全埋式地下車庫為例，討論了地下室頂板分別采用單向板、雙向板和無梁樓蓋方案時消防車輪壓的最不利布置方式。并采用SAP2000有限元軟件中的薄板單元模型分析推導出相應的消防車活荷載的等效均布荷載值。與規(guī)范將消防車活荷載視為一般活荷載而提供的建議值相比，本文提供的意見無論在荷載組合概念上，還是在消防車等效均布荷載取值上更顯科學合理，且其在工程上的應用具有較大的經濟效益與社會效益。［關鍵詞］作用特征；偶然組合；頻遇組合；消防車活荷載中圖分類號：TU312+ .1 文獻標識碼：A 文章編號：1002-848X(2013)01-0044-04Research on reasonable value of live load for fire engine on all buried underground garage roofDai Guanmin, Tian Kun(China Haisum Engineering Co., Ltd., Shanghai 200031, China)Abstract: By the acting characteristic analysis of fire engine's live load effect, it is indicated that fire engine's live load effect should combined in accidental combination for ultimate limit status computation, or combined in frequent combination for serviceability limit status computation. The worst disposals of fire engine tire acting on the roof was discussed when the roof structure is one-way slab, two-way slab or non-beam slab for the example of the common column span 8.4m×8.4m of all buried underground garage. The equivalent uniform fire engine's live load value was given by finite element software SAP2000 using thin-plate element. The recommendation is more reasonable and has better economic and social benefits whether considering the concept of load combination or comparing with the fire engine load recommended by the code which considering fire engine's live load as general live load.Keywords: acting characteristic; accidental combination; frequent combination; fire engine's live load作者簡介：戴冠民，教授級高級工程師，一級注冊結構工程師，結構專業(yè)總監(jiān)，Email:dgm@haisum.com參考文獻［1］GB 50009-2012 建筑結構荷載規(guī)范［S］.北京:中國建筑工業(yè)出版社,2012.［2］全國民用建筑工程設計技術措施(結構)［M］. 北京:中國建筑標準設計研究所, 2003.［3］全國民用建筑工程設計技術措施(規(guī)劃·建筑·景觀)［M］. 北京:中國建筑標準設計研究院, 2009.［4］范重,鞠紅梅,彭中華.消防車等效均布活荷載取值研究［J］.建筑結構,2011,41（3）:1-6.［5］CECS 190:2005 給水排水工程埋地玻璃纖維增強塑料夾砂管管道結構設計規(guī)程［S］. 北京:中國建筑工業(yè)出版社,2005.
