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（1 南京長(zhǎng)江都市建筑設(shè)計(jì)股份有限公司， 南京 210002；2 河海大學(xué)土木與交通學(xué)院， 南京 210098）

［摘要］對(duì)6塊簡(jiǎn)支閉口型壓型鋼板-混凝土組合夾芯保溫樓板進(jìn)行抗彎性能試驗(yàn)研究，分析了組合夾芯樓板的彎曲剛度。研究了混凝土面層厚度、剪跨區(qū)長(zhǎng)度及自攻螺釘抗剪件的設(shè)置對(duì)組合夾芯樓板彎曲剛度的影響。分別采用美國(guó)規(guī)范ANSI/ASCE 3.91建議的換算慣性矩法和修正后的我國(guó)《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）剛度解析法計(jì)算組合夾芯樓板的彎曲剛度，并與試驗(yàn)結(jié)果進(jìn)行分析比較。結(jié)果表明：組合夾芯樓板的破壞形式有彎曲破壞和縱向剪切破壞；混凝土面層厚度越厚，剪跨區(qū)長(zhǎng)度越小，組合夾芯樓板抗彎剛度越大；自攻螺釘抗剪件的設(shè)置，能夠顯著提高組合夾芯樓板后期（滑移產(chǎn)生后）抗彎剛度，而對(duì)組合夾芯樓板前期剛度（滑移產(chǎn)生前）沒(méi)有影響；修正后的我國(guó)《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）剛度解析法計(jì)算值與試驗(yàn)實(shí)測(cè)值吻合較好，適用于組合夾芯樓板的彎曲剛度計(jì)算。

［關(guān)鍵詞］組合夾芯樓板；閉口型壓型鋼板；彎曲剛度；試驗(yàn)研究

中圖分類(lèi)號(hào)：TU398+.9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)04-0109-05

Experimental research on flexural rigidity of re-entrant trough profiled steel sheeting-concrete composite sandwich slabs with function of heat insulation

LU Yunfei1, CAO Pingzhou2, WU Kai2, WU Yongjun1

(1 Nanjing Yangtze River Urban Architectural Design Co., Ltd., Nanjing 210002， China;2 College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China)

Abstract:Six simply supported re-entrant trough profiled steel sheeting-concrete composite sandwich slabs with function of heat insulation were tested in order to investigate the flexural rigidity of the composite sandwich slabs.The influence of the depth of concrete, the length of the shear span and the self-drilling shear screws on the flexural rigidity of composite sandwich floor slabs were studied. The flexural rigidity of composite sandwich slabs was respectively calculated by the method of effective moment of inertia adopted by American code ASCE/ASCE 3.91 and the modified analytical method recommended by Code for design of concrete structures(GB 50010—2010), and the results were compared and analyzed with the test results. The results show that failure patterns of the composite sandwich slabs include flexural failure and longitudinal shear failure; the increasing depth of the concrete and the decreasing shear span lead to rising flexural rigidity of the composite sandwich slabs; the attachment of the self-drilling shear screws can blatantly increase the post-rigidity (before the slip observed) of the composite sandwich slabs, but has little influence on the pre-rigidity (before the slip observed) of the composite sandwich slabs; the results calculated by the modified analytical method recommended by Code for design of concrete structures(GB 50010—2010) are in good agreement with the test results, which are suitable for the calculation of the flexure stiffness of the composite sandwich slabs.

Keywords:composite sandwich slab;re-entrant trough profiled steel sheeting;flexural rigidity;experimental research

*江蘇省建設(shè)廳科研項(xiàng)目2006(123)。

作者簡(jiǎn)介：陸云飛，碩士，高級(jí)工程師，Email:371926010@qq.com。