鋼筋網(wǎng)聚合物砂漿加固古建筑石板試驗(yàn)研究
王亨1,齊文2,邱實(shí)2,謝劍2,徐福泉3
- 摘 要
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(1 天津大學(xué)建筑設(shè)計(jì)研究院, 天津 300072; 2 天津大學(xué)建筑工程學(xué)院, 天津 300072;3 中國建筑科學(xué)研究院, 北京 100013)[摘要]為了尋找適合古建筑石板的加固方法,進(jìn)行了三個(gè)原型石板試驗(yàn)和三個(gè)不采用錨固措施的鋼筋網(wǎng)聚合物砂漿加固石板試驗(yàn),重點(diǎn)研究石板的受彎破壞形態(tài)、沿截面高度的應(yīng)變分布規(guī)律、荷載-撓度曲線和承載力。試驗(yàn)結(jié)果表明:加固后石板的受彎破壞形態(tài)體現(xiàn)出一定延性特征,其受彎承載力有提高但仍存在一定離散性;石板斷裂破壞前,純彎段截面應(yīng)變沿高度方向的分布符合平截面假定。在試驗(yàn)分析的基礎(chǔ)上,提出了加固后石板的開裂承載力和破壞承載力計(jì)算公式。[關(guān)鍵詞]古建筑; 石板; 鋼筋網(wǎng)聚合物砂漿加固; 受彎承載力中圖分類號(hào):TU521.2 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1002-848X(2015)09-0068-05Experimental study on historic building stone slabs strengthened by steel reinforcement mesh and polymer mortarWang Heng1, Qi Wen2, Qiu Shi2, Xie Jian2, Xu Fuquan3(1 Architectural Design and Research Institute of Tianjin University, Tianjin 300072, China; 2 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 3 China Academy of Building Research, Beijing 100013, China)Abstract:In order to find appropriate strengthening methods for stone slabs in historic buildings, experiments were carried out on 3 prototype slabs and 3 specimens strengthened by steel reinforcement mesh and polymer mortar without anchorage. The research was mainly on the bending failure pattern, strain distribution law along the cross-section height, load-deflection curve and bearing capacity. Experimental results show that the bending failure pattern of the strengthening stone slab is ductile failure and there is discrete in the development of flexural bearing capacity. Before the stone slab is damaged, the strain distribution of pure bending section along the beam height meets the plane section assumption. Based on the experimental analyses, the load bearing capacity formulas of the strengthening stone slabs were proposed in both cracking and failure situations.Keywords: historic building; stone slab; steel reinforcement mesh and polymer mortar strengthening; flexural bearing capacity作者簡介:王亨,碩士,高級(jí)工程師,Email: whtju@163.com。參考文獻(xiàn)[1]魏璟璐.中國傳統(tǒng)建筑營造技術(shù)中石質(zhì)材料的應(yīng)用探析——以山西為例[D].太原:太原理工大學(xué),2009.[2]張文明.磚石古塔的抗震性能評(píng)估及地震破壞機(jī)理研究[D].西安:西安建筑科技大學(xué),2008.[3]龔曉進(jìn).石拱橋病害分析及維修加固方法研究[D].成都:西南交通大學(xué),2007.[4]楊慶印.石拱橋靜荷載試驗(yàn)評(píng)估和加固研究[D].合肥:合肥工業(yè)大學(xué),2009.[5]李秋萍.古橋結(jié)構(gòu)體系及石拱橋的分析、監(jiān)測(cè)評(píng)估與保護(hù)[D].杭州:浙江大學(xué),2011.[6]葛靜.石砌體結(jié)構(gòu)抗震性能與加固技術(shù)研究[D].蘭州:蘭州理工大學(xué),2010.[7]劉小娟,郭子雄,胡奕東,等.聚合物砂漿嵌縫加固石墻灰縫抗剪性能研究[J].地震工程與工程振動(dòng),2010,30(6):106-111.[8]施養(yǎng)杭,余建星.采用新型灌漿材料的石墻抗震性能研究[J].地震工程與工程振動(dòng),2004,24(1):105-110.[9]ROGRIO BAIRRO, FALCO SILVA M J. Shaking table tests of two different reinforcement techniques using polymeric grids on an asymmetric limestone full-scaled structure[J]. Engineering Structure, 2009 (31):1321-1330.[10]曹書文,趙東,陳平. CFRP加固石梁的試驗(yàn)研究[J].建筑結(jié)構(gòu),2010,40(5):53-54.[11]張興虎,藺寶鋼,焦海洲,等.預(yù)應(yīng)力大跨度石梁構(gòu)件的抗彎試驗(yàn)研究[J].西安建筑科技大學(xué)學(xué)報(bào):自然科學(xué)版,2011,43(2):172-177.[12]張楠.底部鋼筋網(wǎng)改性砂漿層加固石樓板抗彎性能試驗(yàn)研究[D].泉州:華僑大學(xué),2011.[13]KURTIS K E, DHARAN C K H. Composite fibers for external reinforcement of natural stone[J]. Journal of Composites for Construction, 1997(1):116-119.[14]GB/T 50152—2012 混凝土結(jié)構(gòu)試驗(yàn)方法標(biāo)準(zhǔn)[S].北京:中國建筑工業(yè)出版社,2012.[15]齊文,徐福泉,謝劍,等.古建筑青白石梁受彎性能試驗(yàn)研究[J].建筑科學(xué),2014,30(11):40-43.
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