某平板結(jié)構(gòu)現(xiàn)場(chǎng)加載試驗(yàn)及有限元分析
陳慶軍1,2，蔡健1,2，王英濤1，張?jiān)銮?，謝小東1，陳星3，蘇恒強(qiáng)3
- 摘 要
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陳慶軍1,2，蔡健1,2，王英濤1，張?jiān)銮?/span>1，謝小東1，陳星3，蘇恒強(qiáng)3(1 華南理工大學(xué)土木與交通學(xué)院， 廣州 510641； 2 亞熱帶建筑科學(xué)國(guó)家重點(diǎn)試驗(yàn)室， 廣州 510641；3 廣東省建筑設(shè)計(jì)研究院， 廣州 510010)［摘要］廣州某核心筒板柱結(jié)構(gòu)工程中的板柱節(jié)點(diǎn)內(nèi)埋型鋼架。為檢驗(yàn)該板柱結(jié)構(gòu)的靜載承載能力、變形能力及其他受力性能，采用現(xiàn)場(chǎng)加載測(cè)試及有限元分析進(jìn)行了研究。試驗(yàn)采用分十級(jí)將加氣混凝土砌塊堆加到2m高的加載方法，采集樓板在各級(jí)檢驗(yàn)荷載作用下的撓度及混凝土的應(yīng)變情況。試驗(yàn)結(jié)果表明，在試驗(yàn)荷載達(dá)到設(shè)計(jì)荷載標(biāo)準(zhǔn)組合(7kN/m2)時(shí)，結(jié)構(gòu)未出現(xiàn)可見裂縫，結(jié)構(gòu)位移及應(yīng)變均處于線彈性階段；在試驗(yàn)荷載達(dá)到荷載標(biāo)準(zhǔn)組合2倍(14kN/m2)時(shí)，出現(xiàn)了少量裂縫。采用ABAQUS軟件進(jìn)行了有限元分析，其中樓板采用了分層殼單元。試驗(yàn)結(jié)果與有限元分析結(jié)果吻合良好，有限元分析得到的極限承載力要遠(yuǎn)高于結(jié)構(gòu)的試驗(yàn)荷載，表明了本結(jié)構(gòu)具有較高的安全度。分析也表明節(jié)點(diǎn)區(qū)內(nèi)置的型鋼架除了原設(shè)計(jì)設(shè)想中的提高抗沖切、抗剪能力外，其在抗彎方面也起到了明顯的作用。［關(guān)鍵詞］平板結(jié)構(gòu)； 現(xiàn)場(chǎng)加載； 試驗(yàn)研究； 有限元分析； ABAQUS中圖分類號(hào)：TU398，TU52859文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002848X(2013)12003306Onsite loading experiment and finite element analysis on a flat slab structureChen Qingjun1,2, Cai Jian1,2, Wang Yingtao1, Zhang Zengqiu1, Xie Xiaodong1,Chen Xing3, Su Hengqiang3(1 School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China;2 State Key Laboratory of Subtropical Building Science, Guangzhou 510641, China;3 The Architectural Design & Research Institute of Guangdong Province, Guangzhou 510010, China.)Abstract:For testing the static load carrying capacity, deformation capacity, and other mechanical behavior of a structure in Guangzhou, which is a coretubeflatslab structure, section steel shelf embedded in joint zone, the onsite loading experiment and finite element analysis were carried out. The testing load, which was loaded by aerated concrete bricks to 2m height, was divided into ten steps. In each testing load step, the deflection and concrete strain were collected. The experiment results show that, when the testing load increases to standard combination design load (7kN/m2), the structure does not appear visible cracks and the structural displacement and strain are still in linear elastic stage, when the testing load achieves 2 times of standard combination load (14kN/m2), only a small amount of cracks appear. Finite element analysis software ABAQUS was used for further study, in which layered shells were used for floors. Experimental results and finite element analysis results agree well, and the ultimate bearing capacity of the finite element analysis is much higher than testing load, indicating that this structure has a higher level of security. Analysis also indicates that, in addition to the original design idea of improving punching and shearing ability of the joint zone, the builtin section steel shelf also plays significant roles in the bending capability of the joint.Keywords:flat slab structure; onsite loading; experiment study; finite element analysis; ABAQUS*廣東省自然科學(xué)基金資助項(xiàng)目(9451064101002910)，中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(2011ZM0112)，華南理工大學(xué)亞熱帶建筑科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室自主研究課題項(xiàng)目（2013ZC19）。作者簡(jiǎn)介：陳慶軍，博士，副教授，Email: qjchen@scut.edu.cn。參考文獻(xiàn)［1］陳慶軍, 凌育洪, 鐘國(guó)坤, 等. 某帶多層地下室的預(yù)應(yīng)力板柱抗震墻結(jié)構(gòu)工程設(shè)計(jì)［J］. 昆明理工大學(xué)學(xué)報(bào)：理工版, 2010,35(3):4549.［2］徐堅(jiān). 新型梁柱板柱組合結(jié)構(gòu)樓蓋設(shè)計(jì)方法的研究［D］.南京：東南大學(xué)，2003.［3］蔣永生, 梁書亭, 陳德文,等. 新型梁柱板柱組合結(jié)構(gòu)（住宅）體系的試驗(yàn)研究［J］. 土木工程學(xué)報(bào)，2005,38(10):513.［4］GROSSMAN JACOB S.Verification of proposed design methodologies for effective width of slabs in slabcolumn frames［J］.ACI Structural Journal, 1997, 94(2):181196.［5］黃成若，韓福田， 肖勇，等. 無梁樓蓋的試驗(yàn)研究及設(shè)計(jì)方法［J］. 建筑科學(xué), 1993(2):1726.［6］MORRISON D G, HIRASAWA I, SOZEN M A. Lateralload tests of RC slabcolumn connections［J］. Journal of Structural Engineering, ASCE,1983,109(11):26982714.［7］蔡健, 李光星, 李景,等. 無粘結(jié)預(yù)應(yīng)力混凝土平板T形中柱節(jié)點(diǎn)抗震性能的試驗(yàn)研究與承載力分析［J］. 建筑結(jié)構(gòu)學(xué)報(bào)， 2004,25(6):3743.［8］李光星, 蔡健, 陳加猛, 等. 無粘結(jié)預(yù)應(yīng)力混凝土平板T形柱節(jié)點(diǎn)沖切性能試驗(yàn)研究［J］. 東南大學(xué)學(xué)報(bào)：自然科學(xué)版， 2005,35(4): 563568.［9］CAI JIAN, LI GUANGXING, YANG CHUN,et al. Tests on unbonded posttensioned concrete flat plate with Tshaped column conections［J］. Advances in Structural Engineering (An International Joural), 2006,9(5):671686.［10］劉付均, 蔡健, 張學(xué)文,等. 新型鋼管混凝土柱平板節(jié)點(diǎn)軸壓性能的研究（Ⅰ）——試驗(yàn)概況及結(jié)果分析［J］. 華南理工大學(xué)學(xué)報(bào)， 2003,31(3):7780.［11］劉文，姚謙峰. 垂直荷載作用下板柱結(jié)構(gòu)計(jì)算方法的比較與分析［J］. 建筑結(jié)構(gòu), 2009,39(8):5659,55.
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