884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

 

(1 湖南大學(xué)土木工程學(xué)院,現(xiàn)代竹木及組合結(jié)構(gòu)研究所，長(zhǎng)沙 410082；2 南加州大學(xué)土木系，洛杉磯CA 90089)

［摘要］提出了一種以膠合竹板為基本材料的現(xiàn)代竹結(jié)構(gòu)人行橋梁，并通過(guò)3根足尺試件試驗(yàn)，研究了膠合竹板制成長(zhǎng)梁的成型工藝和構(gòu)件的力學(xué)性能。試驗(yàn)顯示，竹梁的破壞是由受壓區(qū)竹材分層導(dǎo)致對(duì)接頭錯(cuò)位引起的，CFRP增強(qiáng)層對(duì)竹梁的強(qiáng)度有所提高，采用短板拼接、整體膠合成型的大尺寸竹梁的剛度和承載力均能滿足人行天橋建設(shè)的要求。根據(jù)試驗(yàn)和分析結(jié)果，研究者采用預(yù)制裝配方式建造了一座現(xiàn)代竹結(jié)構(gòu)人行天橋，并在建造中對(duì)竹結(jié)構(gòu)人行橋采取了整體防水處理。該橋經(jīng)過(guò)兩年多的使用，主體結(jié)構(gòu)正常。

［關(guān)鍵詞］竹結(jié)構(gòu)；膠合竹板；竹梁；人行天橋

Research and construction of modern bamboo pedestrian bridges

Shan Bo¹, Zhou Quan¹, Xiao Yan^1,2(1 Institute of Modern Bamboo, Timber and Composite Structures, Hunan University, Changsha 410082, China；2 Department of Civil Engineering, University of Southern California, Los Angeles CA 90089, USA)

Abstract:A new type of bridge structure using laminated bamboo girders is presented. Three full-scale bamboo beams were tested in order to research processing methods and mechanical performance of model beams. The failure of the beams was caused by the delamination of laminated bamboo sheet or joint fracture in the mid-span zone. The CFRP sheet in the tensile side of beam showed effect of increasing capacity. The bamboo beam has enough stiffness and loading capacity for building pedestrian bridges. Based on testing and analysis, a modern bamboo pedestrian bridge was constructed successfully using a prefabricated procedure. The bridge performs well for more than two years after it was opened to usage.

Keywords:bamboo structure; laminated bamboo sheet; bamboo beam; pedestrian bridge

長(zhǎng)江學(xué)者創(chuàng)新團(tuán)隊(duì)計(jì)劃(IRT0619)；國(guó)家自然科學(xué)基金專項(xiàng)(50848044)；湖南大學(xué)土木工程學(xué)院現(xiàn)代竹木及組合結(jié)構(gòu)研究所(IBTCS)啟動(dòng)基金。

作者簡(jiǎn)介：?jiǎn)尾ǎ┦?，講師，Email:supershanb@163.com。

參考文獻(xiàn)

［1］雷加富.中國(guó)竹資源和竹產(chǎn)業(yè)的可持續(xù)發(fā)展戰(zhàn)略［M］.北京：中國(guó)林業(yè)出版社，2001.

［2］李世東，許傳德.中國(guó)竹業(yè)發(fā)展經(jīng)歷與21世紀(jì)發(fā)展戰(zhàn)略［J］.竹子研究匯刊，1998，19(1)：1-5.

［3］鐘懋功.我國(guó)竹產(chǎn)業(yè)的回顧與幾點(diǎn)建議［J］.竹子研究匯刊，2000，19(3)：26-29.

［4］XIAO YAN，et al. Modern bamboo structures［C］//Proceedings of the First International Conference on Modern Bamboo Structures. London: CRC Press, Taylor and Francis, 2008.

［5］CJJ69—95城市人行天橋與人行地道技術(shù)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，1996.

［6］廖順癢.人行天橋設(shè)計(jì)與施工［M］.上海：同濟(jì)大學(xué)出版社，1995.

［7］JG/T3026—1995竹膠合板模板［S］.北京：中國(guó)建筑工業(yè)出版社，1996.

［8］張建新，等.最新膠合板生產(chǎn)加工［M］.北京：中國(guó)科學(xué)文化出版社，2002.

［9］楊會(huì)峰，劉偉慶.FRP增強(qiáng)膠合木梁的受彎性能研究［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2007，28(1)：64-71.

［10］GB50005—2003木結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，2003.