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（中國(guó)建筑科學(xué)研究院建筑結(jié)構(gòu)研究所, 北京 100013）

［摘要］基于滑模施工成型的鋼筋混凝土筒倉(cāng)分為單倉(cāng)與群倉(cāng)，多年來(lái)作為大型殼體倉(cāng)儲(chǔ)構(gòu)筑物，已成為國(guó)內(nèi)外眾多水泥廠、糧庫(kù)等企業(yè)的標(biāo)志性建筑，其中倉(cāng)底混凝土錐面漏斗主要承受截面拉力，徑向與環(huán)向配筋通常由抗裂性能要求控制，一般單獨(dú)支?，F(xiàn)澆成型。通過(guò)某工程混凝土群倉(cāng)漏斗裂損與安全度缺陷的加固設(shè)計(jì)，對(duì)比研究了所提出的兩個(gè)可行加固方案，分別為：頂面與底面粘貼碳纖維片材和頂面新增配筋混凝土覆殼。詳述了選定方案的加固驗(yàn)算條件、過(guò)程與結(jié)果，并給出了相應(yīng)設(shè)計(jì)說(shuō)明與技術(shù)建議，可供同類(lèi)筒倉(cāng)結(jié)構(gòu)設(shè)計(jì)和施工參考。

［關(guān)鍵詞］鋼筋混凝土筒倉(cāng)； 混凝土漏斗； 錐面殼體； 最大裂縫寬度； 碳纖維片材(CFS)； 混凝土覆殼； 隔離層

中圖分類(lèi)號(hào)：TU279-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)06-0026-05

Research on strengthening design of reinforced concrete silo funnel

Pan Li, Pan Congjian

(Institute of Building Structures, China Academy of Building Research, Beijing 100013，  China)

Abstract:As large storage shell structures constructed on special slipforms, reinforced concrete silos have become the landmark of cement plants and warehousing companies at home and abroad for many years, and they are differentiated as single independent silos and connected group silos based on slipform construction molding. The concrete cone funnels at bottom of the silo wall are mainly subjected to cross section tension, and radial and circumferential reinforcements are usually controlled by the anti-cracking performance. They are separately molded and cast-in-place. The strengthening design of cracking and safety default of concrete connected group silos in a project were studied by comparing two feasible strengthening schemes including pasting carbon fiber sheets on the top and bottom and setting new reinforced concrete shell on the top surface. The checking calculation conditions, process and results of the selected schemes were described in detail, and corresponding design instructions and technical proposals were given, which could be used for reference in structural design and construction of similar silos.

Keywords:reinforced concrete silo; concrete funnel; cone shell; maximum crack width; carbon fiber sheet(CFS); concrete cover shell; isolation layer

作者簡(jiǎn)介：潘立，碩士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: panlicabr@163.com。