C60全珊瑚海水钢筋混凝土梁的抗剪性能与计算模型
|
摘要
为研究全珊瑚海水钢筋混凝土梁(coral aggregate reinforced concrete beam,CARCB)的抗剪性能和计算模型,设计了7根不同种类钢筋的CARCB,通过对其进行斜截面抗剪性能试验,研究了钢筋种类对CARCB的变形及抗剪承载能力的影响,建立了弯矩-跨中挠度、荷载-钢筋应变、荷载-裂缝宽度的关系,提出了CARCB斜截面抗剪承载力的计算模型.试验结果表明:不同种类钢筋CARCB的正截面开裂荷载和抗剪承载力规律均为316不锈钢>普通钢筋>锌铬涂层钢筋>有机新涂层钢筋;CARCB中普通钢筋发生了严重锈蚀,使其刚度出现了一定程度的退化;不同种类钢筋的CARCB,其裂缝宽度均随着荷载的增大而增长,加载初期,在梁跨中附近出现正截面弯曲裂缝,裂缝宽度开展非常缓慢,随着荷载的增加,在支座向集中力作用点处出现斜裂缝,斜裂缝宽度迅速增大,最终导致梁破坏;最后,综合考虑钢筋锈蚀和高强混凝土对CARCB抗剪承载力的影响,提出了更加合理的CARCB抗剪承载力计算模型.
Seven coral aggregate reinforced concrete beams(CARCBs) with different types of reinforcement were designed in this study to investigate their shear behavior and calculation model. The shear behavior of CARCB was tested, and the deformation and shear capacity were investigated. The relationships of bending moment-midspan deflection, load-steel strain, and load-crack width were established. A calculation model for the ultimate bearing capacity(V_(cs)) of CARCB was proposed. Results show that normal section cracking load(V_(cr)) and V_(cs) of CARCB followed the rule: 316 stainless steel > common steel > zinc-chromium coated steel > organic new coated steel. The common steel had serious corrosion in the CARCB, which led to the degradation of stiffness. The CARCB crack width increased with the increase of load for different reinforcement types. In the initial loading stage, flexural cracks occurred at the midspan of the beam, which developed slowly. Inclined cracks were formed from the support to the concentrated force point with increasing loads, which widened rapidly, leading to beam failure. Therefore, with comprehensive consideration on the effects of reinforcement corrosion and high-strength concrete on the V_(cs) of CARCB, a calculation model for the V_(cs) of CARCB was proposed.
Seven coral aggregate reinforced concrete beams(CARCBs) with different types of reinforcement were designed in this study to investigate their shear behavior and calculation model. The shear behavior of CARCB was tested, and the deformation and shear capacity were investigated. The relationships of bending moment-midspan deflection, load-steel strain, and load-crack width were established. A calculation model for the ultimate bearing capacity(V_(cs)) of CARCB was proposed. Results show that normal section cracking load(V_(cr)) and V_(cs) of CARCB followed the rule: 316 stainless steel > common steel > zinc-chromium coated steel > organic new coated steel. The common steel had serious corrosion in the CARCB, which led to the degradation of stiffness. The CARCB crack width increased with the increase of load for different reinforcement types. In the initial loading stage, flexural cracks occurred at the midspan of the beam, which developed slowly. Inclined cracks were formed from the support to the concentrated force point with increasing loads, which widened rapidly, leading to beam failure. Therefore, with comprehensive consideration on the effects of reinforcement corrosion and high-strength concrete on the V_(cs) of CARCB, a calculation model for the V_(cs) of CARCB was proposed.
引文
[1] 陈兆林,陈天月,曲勋明.珊瑚礁砂混凝土的应用可行性研究[J].海洋工程,1991,9(3):67CHEN Zhaolin,CHEN Tianyue,QU Xunming.A feasibility study of application of coral reef sand concrete[J].The Ocean Engineering,1991,9(3):67
[2] DA Bo,YU Hongfa,MA Haiyan,et al.Chloride diffusion study of coral concrete in a marine environment[J].Construction and Building Materials,2016,123:47.DOI:10.1016/j.conbuildmat.2016.06.135
[3] YU Hongfa,DA Bo,MA Haiyan,et al.Durability of concrete structures in tropical atoll environment[J].Ocean Engineering,2017,135:1.DOI:10.1016/j.oceaneng.2017.02.020
[4] TANG Luping.Engineering expression of the ClinConc model for prediction of free and total chloride ingress in submerged marine concrete[J].Cement and Concrete Research,2008,38:1092.DOI:10.1016/j.cemconres.2008.03.008
[5] GUZMáN S,GáLVEZ J,JOSéM S.Cover cracking of reinforced concrete due to rebar corrosion induced by chloride penetration[J].Cement and Concrete Research,2011,41(8):893.DOI:10.1016/j.cemconres.2011.04.008
[6] 何世钦,贡金鑫.钢筋混凝土梁中锈蚀钢筋粘结性能的试验研究[J].哈尔滨工业大学学报,2006,38(12):2167HE Shiqin,GONG Jinxin.Experimental studies on bond characteristics of corroded steel bar in reinforced concrete beams[J].Journal of Harbin Institute of Technology,2006,38(12):2167.DOI:10.11918/j.issn.0367-6234.2006.12.037
[7] RICK A E.Coral concrete at bikini atoll[J].Concrete International,1991,1:19
[8] KAKOOEI S,AKIL H,DOLATI A,et al.The corrosion investigation of rebar embedded in the fibers reinforced concrete[J].Construction and Building Materials,2012,35:564.DOI:10.1016/j.conbuildmat.2012.04.051
[9] 张文.配筋珊瑚混凝土构件试验研究[D].南京:河海大学,1995ZHANG Wen.Experimental study on reinforced coral aggregate concrete component[D].Nanjing:Hohai University,1995
[10]DA Bo,YU Hongfa,MA Haiyan,et al.Experimental investigation of whole stress-strain curves of coral concrete[J].Construction and Building Materials,2016,122:81.DOI:10.1016/j.conbuildmat.2016.06.064
[11]达波,余红发,麻海燕,等.全珊瑚海水混凝土单轴受压应力-应变全曲线试验研究[J].建筑结构学报,2017,38(1):144DA Bo,YU Hongfa,MA Haiyan,et al.Experimental research on whole stress-strain curves of coral aggregate seawater concrete under uniaxial compression[J].Journal of Building Structures,2017,38(1):144.DOI:10.14006/j.jzjgxb.2017.01.016
[12]达波,余红发,麻海燕,等.热带岛礁环境下全珊瑚海水混凝土结构服役寿命的可靠性[J].硅酸盐学报,2018,46(11):1613DA Bo,YU Hongfa,MA Haiyan,et al.Reliability of service life of coral aggregate seawater concrete structure in tropic island reef environment[J].Journal of the Chinese Ceramic Society,2018,46(11):1613.DOI:10.14062/j.issn.0454-5648.2018.11.16
[13]达波,余红发,麻海燕,等.南海海域珊瑚混凝土结构的耐久性影响因素[J].硅酸盐学报,2016,44(2):253DA Bo,YU Hongfa,MA Haiyan,et al.Factors influencing durability of coral concrete structure in South China Sea[J].Journal of the Chinese Ceramic Society,2016,44(2):253.DOI:10.14062/j.issn.0454-5648.2016.02.11
[14]MA Haiyan,DA Bo,YU Hongfa,et al.Research on flexural behavior of coral aggregate reinforced concrete beams[J].China Ocean Engineering,2018,32(5):593.DOI:10.1007/s13344-018-0061-6
[15]Standard practice for the preparation of substitute ocean water:ASTM D1141—2003[S].Philadelphia:American Society for Testing and Materials,2003
[16]袁迎曙,贾福萍,蔡跃.锈蚀钢筋混凝土梁的结构性能退化模型[J].土木工程学报,2001,34(3):47YUAN Yingshu,JIA Fuping,CAI Yue.The structural behavior deterioration model for corroded reinforced concrete beams[J].China Civil Engineering Journal,2001,34(3):47.DOI:10.3321/j.issn.1000-131X.2001.03.009
[17]DA Bo,YU Hongfa,MA Haiyan,et al.Reinforcement corrosion research based on the linear polarization resistance method for coral aggregate seawater concrete in a marine environment[J].Anti-Corrosion Methods and Materials,2018,65(5):458.DOI:10.1108/ACMM-03-2018-1911
[18]曾初升.316L不锈钢腐蚀性能电化学研究[D].昆明:昆明理工大学,2006ZENG Chusheng.Electrochemical research of 316L stainless steel corrosion[D].Kunming:Kunming University of Science and Technology,2006
[19]赵艳丽,高媚,胡吉明,等.镀锌钢表面硅烷掺杂电泳漆涂层的腐蚀电化学行为研究[J].腐蚀科学与防护技术,2016,28(5):407ZHAO Yanli,GAO Mei,HU Jiming,et al.Electrochemical investigation of corrosion performance of electrophoretic hybrid epoxy-silane coatings on galvanized steel[J].Corrosion Science and Protection Technology,2016,28(5):407.DOI:10.11903/1002.6495.2015.358
[20]混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出社,2010Code for design of concrete structures:GB 50010—2010[S].Beijing:China Architecture & Building Press,2010
[21]轻骨料混凝土结构技术规程:JGJ 12—2006[S].北京:中国建筑工业出社,2006Specification for design of lightweight aggregate concrete structures:JGJ 12—2006[S].Beijing:China Architecture & Building Press,2006
[22]张伟平,张誉.锈胀开裂后钢筋混凝土粘结滑移本构关系研究[J].土木工程学报,2001,34(5):39ZHANG Weiping,ZHANG Yu.Bond-slip relationship between corroded steel bars and concrete[J].China Civil Engineering Journal,2001,34(5):39.DOI:10.3321/j.issn.1000-131X.2001.05.008
[23]徐善华,牛荻涛.锈蚀钢筋混凝土简支梁斜截面抗剪性能研究[J].建筑结构学报,2004,25(5):98XU Shanhua,NIU Ditao.The shear behavior of corroded simply supported reinforced concrete beam[J].Journal of Building Structures,2004,25(5):98.DOI:10.3321/j.issn.1000-6869.2004.05.016
[24]袁迎曙,贾福萍.锈蚀钢筋的力学性能退化研究[J].工业建筑,2000,30(1):43YUAN Yingshu,JIA Fuping.Deterioration of mechanical behavior of corroded steel bar[J].Industrial Construction,2000,30(1):43.DOI:10.3321/j.issn.1000-8993.2000.01.012
[2] DA Bo,YU Hongfa,MA Haiyan,et al.Chloride diffusion study of coral concrete in a marine environment[J].Construction and Building Materials,2016,123:47.DOI:10.1016/j.conbuildmat.2016.06.135
[3] YU Hongfa,DA Bo,MA Haiyan,et al.Durability of concrete structures in tropical atoll environment[J].Ocean Engineering,2017,135:1.DOI:10.1016/j.oceaneng.2017.02.020
[4] TANG Luping.Engineering expression of the ClinConc model for prediction of free and total chloride ingress in submerged marine concrete[J].Cement and Concrete Research,2008,38:1092.DOI:10.1016/j.cemconres.2008.03.008
[5] GUZMáN S,GáLVEZ J,JOSéM S.Cover cracking of reinforced concrete due to rebar corrosion induced by chloride penetration[J].Cement and Concrete Research,2011,41(8):893.DOI:10.1016/j.cemconres.2011.04.008
[6] 何世钦,贡金鑫.钢筋混凝土梁中锈蚀钢筋粘结性能的试验研究[J].哈尔滨工业大学学报,2006,38(12):2167HE Shiqin,GONG Jinxin.Experimental studies on bond characteristics of corroded steel bar in reinforced concrete beams[J].Journal of Harbin Institute of Technology,2006,38(12):2167.DOI:10.11918/j.issn.0367-6234.2006.12.037
[7] RICK A E.Coral concrete at bikini atoll[J].Concrete International,1991,1:19
[8] KAKOOEI S,AKIL H,DOLATI A,et al.The corrosion investigation of rebar embedded in the fibers reinforced concrete[J].Construction and Building Materials,2012,35:564.DOI:10.1016/j.conbuildmat.2012.04.051
[9] 张文.配筋珊瑚混凝土构件试验研究[D].南京:河海大学,1995ZHANG Wen.Experimental study on reinforced coral aggregate concrete component[D].Nanjing:Hohai University,1995
[10]DA Bo,YU Hongfa,MA Haiyan,et al.Experimental investigation of whole stress-strain curves of coral concrete[J].Construction and Building Materials,2016,122:81.DOI:10.1016/j.conbuildmat.2016.06.064
[11]达波,余红发,麻海燕,等.全珊瑚海水混凝土单轴受压应力-应变全曲线试验研究[J].建筑结构学报,2017,38(1):144DA Bo,YU Hongfa,MA Haiyan,et al.Experimental research on whole stress-strain curves of coral aggregate seawater concrete under uniaxial compression[J].Journal of Building Structures,2017,38(1):144.DOI:10.14006/j.jzjgxb.2017.01.016
[12]达波,余红发,麻海燕,等.热带岛礁环境下全珊瑚海水混凝土结构服役寿命的可靠性[J].硅酸盐学报,2018,46(11):1613DA Bo,YU Hongfa,MA Haiyan,et al.Reliability of service life of coral aggregate seawater concrete structure in tropic island reef environment[J].Journal of the Chinese Ceramic Society,2018,46(11):1613.DOI:10.14062/j.issn.0454-5648.2018.11.16
[13]达波,余红发,麻海燕,等.南海海域珊瑚混凝土结构的耐久性影响因素[J].硅酸盐学报,2016,44(2):253DA Bo,YU Hongfa,MA Haiyan,et al.Factors influencing durability of coral concrete structure in South China Sea[J].Journal of the Chinese Ceramic Society,2016,44(2):253.DOI:10.14062/j.issn.0454-5648.2016.02.11
[14]MA Haiyan,DA Bo,YU Hongfa,et al.Research on flexural behavior of coral aggregate reinforced concrete beams[J].China Ocean Engineering,2018,32(5):593.DOI:10.1007/s13344-018-0061-6
[15]Standard practice for the preparation of substitute ocean water:ASTM D1141—2003[S].Philadelphia:American Society for Testing and Materials,2003
[16]袁迎曙,贾福萍,蔡跃.锈蚀钢筋混凝土梁的结构性能退化模型[J].土木工程学报,2001,34(3):47YUAN Yingshu,JIA Fuping,CAI Yue.The structural behavior deterioration model for corroded reinforced concrete beams[J].China Civil Engineering Journal,2001,34(3):47.DOI:10.3321/j.issn.1000-131X.2001.03.009
[17]DA Bo,YU Hongfa,MA Haiyan,et al.Reinforcement corrosion research based on the linear polarization resistance method for coral aggregate seawater concrete in a marine environment[J].Anti-Corrosion Methods and Materials,2018,65(5):458.DOI:10.1108/ACMM-03-2018-1911
[18]曾初升.316L不锈钢腐蚀性能电化学研究[D].昆明:昆明理工大学,2006ZENG Chusheng.Electrochemical research of 316L stainless steel corrosion[D].Kunming:Kunming University of Science and Technology,2006
[19]赵艳丽,高媚,胡吉明,等.镀锌钢表面硅烷掺杂电泳漆涂层的腐蚀电化学行为研究[J].腐蚀科学与防护技术,2016,28(5):407ZHAO Yanli,GAO Mei,HU Jiming,et al.Electrochemical investigation of corrosion performance of electrophoretic hybrid epoxy-silane coatings on galvanized steel[J].Corrosion Science and Protection Technology,2016,28(5):407.DOI:10.11903/1002.6495.2015.358
[20]混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出社,2010Code for design of concrete structures:GB 50010—2010[S].Beijing:China Architecture & Building Press,2010
[21]轻骨料混凝土结构技术规程:JGJ 12—2006[S].北京:中国建筑工业出社,2006Specification for design of lightweight aggregate concrete structures:JGJ 12—2006[S].Beijing:China Architecture & Building Press,2006
[22]张伟平,张誉.锈胀开裂后钢筋混凝土粘结滑移本构关系研究[J].土木工程学报,2001,34(5):39ZHANG Weiping,ZHANG Yu.Bond-slip relationship between corroded steel bars and concrete[J].China Civil Engineering Journal,2001,34(5):39.DOI:10.3321/j.issn.1000-131X.2001.05.008
[23]徐善华,牛荻涛.锈蚀钢筋混凝土简支梁斜截面抗剪性能研究[J].建筑结构学报,2004,25(5):98XU Shanhua,NIU Ditao.The shear behavior of corroded simply supported reinforced concrete beam[J].Journal of Building Structures,2004,25(5):98.DOI:10.3321/j.issn.1000-6869.2004.05.016
[24]袁迎曙,贾福萍.锈蚀钢筋的力学性能退化研究[J].工业建筑,2000,30(1):43YUAN Yingshu,JIA Fuping.Deterioration of mechanical behavior of corroded steel bar[J].Industrial Construction,2000,30(1):43.DOI:10.3321/j.issn.1000-8993.2000.01.012
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |