基于正交的圆钢管再生混凝土柱力学性能研究
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摘要
目的研究圆钢管再生混凝土柱力学性能的影响因素,推算出适用于此类组合柱的承载力计算公式.方法利用正交试验变化含钢率、取代率和长细比等参数变量对柱的荷载-应变、荷载-挠度等关系曲线进行分析.结果试验结果表明:组合柱弹塑性失稳破坏破坏特征显著,承载力影响因素的敏感程度依次为长细比、含钢率和取代率,其均值分别为196、147、113;当长细比为50、含钢率为11%、取代率为30%时,承载力最大为1 351 kN;模拟结果表明:组合柱中部应力最大,破坏程度最大.结论根据国内外的承载力规程进行计算,对比得出中国CECS28—2012规程最适合此类结构,推算出适应于此组合柱的承载力计算公式:N=(-0.016 8λ+1.809 3)(f_yA_s+K_1f_cA_c).
In order to study the sensitive factors to the mechanical properties of recycled concrete filled circular steel tubular columns and deduce the bearing capacity formula suitable for such composite columns,the load-strain and load-deflection curves of the columns are analyzed by orthogonal test with the parameters of steel content,substitution rate and slenderness ratio,and then simulated by finite element method.The test results show that the elastic-plastic failure characteristics of composite columns are remarkable,and the sensitivity of bearing capacity factors is slenderness ratio,steel content and substitution ratio in turn.The average values are 196,147 and 113,respectively.When slenderness ratio is 50,steel content is 11% and substitution ratio is 30%,the maximum bearing capacity is 1 351 kN.The simulation results show that the stress in the middle of the composite column is the largest and the damage degree is the greatest.According to the domestic and foreign rules of bearing capacity,it is concluded that the regulations of CECS28—2012 in China is most suitable for this kind of structure,Finally,obtains the calculating formula of bearing capacity from this composite column: N=(-0.016 8λ+1.809 3)(f_yA_s+K_1f_cA_c).
In order to study the sensitive factors to the mechanical properties of recycled concrete filled circular steel tubular columns and deduce the bearing capacity formula suitable for such composite columns,the load-strain and load-deflection curves of the columns are analyzed by orthogonal test with the parameters of steel content,substitution rate and slenderness ratio,and then simulated by finite element method.The test results show that the elastic-plastic failure characteristics of composite columns are remarkable,and the sensitivity of bearing capacity factors is slenderness ratio,steel content and substitution ratio in turn.The average values are 196,147 and 113,respectively.When slenderness ratio is 50,steel content is 11% and substitution ratio is 30%,the maximum bearing capacity is 1 351 kN.The simulation results show that the stress in the middle of the composite column is the largest and the damage degree is the greatest.According to the domestic and foreign rules of bearing capacity,it is concluded that the regulations of CECS28—2012 in China is most suitable for this kind of structure,Finally,obtains the calculating formula of bearing capacity from this composite column: N=(-0.016 8λ+1.809 3)(f_yA_s+K_1f_cA_c).
引文
[1] 钟善桐,张文福,屠永清,等.钢管混凝土结构抗震性能的研究[J].建筑钢结构进展,2002,4(2):3-15.(ZHONG Shantong,ZHANG Wenfu,TU Yongqing,et al.The research of seismic behaviors for concrete-filled steel tubular(CFST)structures[J].Progress in steel building structures,2002,4(2):3-15.)
[2] 周静海,何海进,孟宪宏,等.再生混凝土基本力学性能试验[J].沈阳建筑大学学报(自然科学版),2010,26(3):464-468.(ZHOU Jinghai,HE Haijin,MENG Xianhong,et al.Basic mechanical properties of recycled concrete experimental study[J].Journal of Shenyang jianzhu university(natural science),2010,26(3):464-468.)
[3] 周静海,边晨,王凤池,等.再生骨料的分布对再生混凝土抗拉性能的影响[J].沈阳建筑大学学报(自然科学版),2015,31(2):267-275.(ZHOU Jinghai,BIAN Chen,WANG Fengchi,et al.The effect of recycled aggregate distribution uniformity on recycled concrete tensile properties[J].Journal of Shenyang jianzhu university(natural science),2015,31(2):267-275.)
[4] 董素芹,魏献忠,高兵.基于正交试验和有限元模拟的圆钢管再生混凝土柱力学性能敏感因素分析[J].建筑钢结构进展,2018,20(5):52-58.(DONG Suqin,WEI Xianzhong,GAO Bing.Sensitivity analysis on mechanical properties of recycled concrete filled circular steel tubular columns based on orthogonal test and numerical simulation[J].Progress in steel building structures,2018,20(5):52-58.)
[5] CHITAWADAGI M V,NARASIMHAN M C,KULKARNI S M.Axial strength of circular concrete-filled steel tube columns-DOE approach[J].Journal of constructional steel research,2010,66(10):1248-1260.
[6] 邱慈长,王清远,石宵爽,等.薄壁钢管再生混凝土轴压实验研究[J].实验力学,2011,26(1):8-15.(QIU Cichang,WANG Qingyuan,SHI Xiaoshuang,et al.Experimental investigation on the behavior of recycle concrete-filled thin-walled steel tube under axial compression[J].Journal of experimental mechanics,2011,26(1):8-15.)
[7] 张向冈,陈宗平,薛建阳.钢管再生混凝土柱塑性铰长度试验研究[J].建筑结构,2015,45(20):52-56.(ZHANG Xianggang,CHEN Zongping,XUE Jianyang.Test study on plastic hinge length of recycled aggregate concrete filled steel tube column[J].Building structure,2015,45(20):52-56.)
[8] 向星赟,赵人达,贾毅,等.方钢管自密实再生混凝土偏压短柱的力学行为[J].沈阳建筑大学学报(自然科学版),2017,33(3):420-428.(XIANG Xingyun,ZHAO Renda,JIA Yi,et al.Mechanical behavior of the eccentric loaded square self-compacting recycled aggregate concrete filled steel tube stub columns[J].Journal of Shenyang jianzhu university(natural science),2017,33(3):420-428.)
[9] GE H B,USAMI T.Strength analysis of concrete-filled thin-walled steel box columns[J].Journal of constructional steel research,1994,30(3):259-281.
[10] CAO V V.Experimental behaviour of recycled aggregate concrete-filled steel tubes under axial loading[J].International journal of civil engineering,2019(1).
[11] THOMAS C,SETIéN J,POLANCO J A,et al.Durability of recycled aggregate concrete[J].Construction and building materials,2013,40:1054-1065.
[12] CHEN Zongping,JING Chenggui,XU Jinjun,et al.Seismic performance of recycled concrete-filled square steel tube columns[J].Earthquake engineering and engineering vibration,2017(1):122-133.
[13] 张志权,赵均海,张玉芬,等.复合钢管混凝土柱轴压承载力计算[J].长安大学学报(自然科学版),2010,30(1):67-71.(ZHANG Zhiquan,ZHAO Junhai,ZHANG Yufen,et al.Axial bearing capacity of composite concrete-filled steel tubular columns[J].Journal of Chang'an university(natural science edition),2010,30(1):67-71.)
[14] 吴波,赵新宇,张金锁.薄壁圆钢管再生混合中长柱的轴压与偏压试验研究[J].土木工程学报,2012(5):65-77.(WU Bo,ZHAO Xinyu,ZHANG Jinsuo.Tests on slender circular thin-walled steel tubular columns filled with demolished concrete lumps under concentrically/eccentrically compressive loading[J].China civil engineering journal,2012(5):65-77.)
[15] Architectural Institute of Japan.Recommendations for design and construction of concrete filled steel tubular structures:AIJ-CFT(1997)[S].Tokyo:Architectural Institute of Japan,1997.
[16] 马欣伯,张素梅,孙玉平.日本AIJ关于圆钢管混凝土构件承载力设计方法介绍[J].工业建筑,2004,34(2):69-74.(MA Xinbo,ZHANG Sumei,SUN Yuping.Introduction to AIJ method of load-carrying capacity of concrete-filled circular steel tubes[J].Industrial construction,2004,34(2):69-74.)
[17] American Institute of Steel Construction(ASIC).Specification for structural steel buildings:AISC-LRFD(99)[S].Chicago,USA:[s.n.],2005.
[18] 哈尔滨工业大学,中国建筑科学研究院.钢管混凝土结构技术规程:CECS 28:2012 [S].北京:中国计划出版社,2012.(Harbin Institute of Technology,China Academy of Building Research.Specification for design and construction of concrete-filled steel tubular structures:CECS 28:2012 [S].Beijing:China planning press,2012.)
[19] 吴波,刘伟,刘琼祥,等.钢管再生混合短柱的轴压性能试验[J].土木工程学报,2010,43(2):32-38.(WU Bo,LIU Wei,LIU Qiongxiang,et al.Experimental study on the behavior of recycled-concrete-segment/lump filled steel tubular stub columns subjected to concentrically axial load[J].China civil engineering journal,2010,43(2):32-38.)
[2] 周静海,何海进,孟宪宏,等.再生混凝土基本力学性能试验[J].沈阳建筑大学学报(自然科学版),2010,26(3):464-468.(ZHOU Jinghai,HE Haijin,MENG Xianhong,et al.Basic mechanical properties of recycled concrete experimental study[J].Journal of Shenyang jianzhu university(natural science),2010,26(3):464-468.)
[3] 周静海,边晨,王凤池,等.再生骨料的分布对再生混凝土抗拉性能的影响[J].沈阳建筑大学学报(自然科学版),2015,31(2):267-275.(ZHOU Jinghai,BIAN Chen,WANG Fengchi,et al.The effect of recycled aggregate distribution uniformity on recycled concrete tensile properties[J].Journal of Shenyang jianzhu university(natural science),2015,31(2):267-275.)
[4] 董素芹,魏献忠,高兵.基于正交试验和有限元模拟的圆钢管再生混凝土柱力学性能敏感因素分析[J].建筑钢结构进展,2018,20(5):52-58.(DONG Suqin,WEI Xianzhong,GAO Bing.Sensitivity analysis on mechanical properties of recycled concrete filled circular steel tubular columns based on orthogonal test and numerical simulation[J].Progress in steel building structures,2018,20(5):52-58.)
[5] CHITAWADAGI M V,NARASIMHAN M C,KULKARNI S M.Axial strength of circular concrete-filled steel tube columns-DOE approach[J].Journal of constructional steel research,2010,66(10):1248-1260.
[6] 邱慈长,王清远,石宵爽,等.薄壁钢管再生混凝土轴压实验研究[J].实验力学,2011,26(1):8-15.(QIU Cichang,WANG Qingyuan,SHI Xiaoshuang,et al.Experimental investigation on the behavior of recycle concrete-filled thin-walled steel tube under axial compression[J].Journal of experimental mechanics,2011,26(1):8-15.)
[7] 张向冈,陈宗平,薛建阳.钢管再生混凝土柱塑性铰长度试验研究[J].建筑结构,2015,45(20):52-56.(ZHANG Xianggang,CHEN Zongping,XUE Jianyang.Test study on plastic hinge length of recycled aggregate concrete filled steel tube column[J].Building structure,2015,45(20):52-56.)
[8] 向星赟,赵人达,贾毅,等.方钢管自密实再生混凝土偏压短柱的力学行为[J].沈阳建筑大学学报(自然科学版),2017,33(3):420-428.(XIANG Xingyun,ZHAO Renda,JIA Yi,et al.Mechanical behavior of the eccentric loaded square self-compacting recycled aggregate concrete filled steel tube stub columns[J].Journal of Shenyang jianzhu university(natural science),2017,33(3):420-428.)
[9] GE H B,USAMI T.Strength analysis of concrete-filled thin-walled steel box columns[J].Journal of constructional steel research,1994,30(3):259-281.
[10] CAO V V.Experimental behaviour of recycled aggregate concrete-filled steel tubes under axial loading[J].International journal of civil engineering,2019(1).
[11] THOMAS C,SETIéN J,POLANCO J A,et al.Durability of recycled aggregate concrete[J].Construction and building materials,2013,40:1054-1065.
[12] CHEN Zongping,JING Chenggui,XU Jinjun,et al.Seismic performance of recycled concrete-filled square steel tube columns[J].Earthquake engineering and engineering vibration,2017(1):122-133.
[13] 张志权,赵均海,张玉芬,等.复合钢管混凝土柱轴压承载力计算[J].长安大学学报(自然科学版),2010,30(1):67-71.(ZHANG Zhiquan,ZHAO Junhai,ZHANG Yufen,et al.Axial bearing capacity of composite concrete-filled steel tubular columns[J].Journal of Chang'an university(natural science edition),2010,30(1):67-71.)
[14] 吴波,赵新宇,张金锁.薄壁圆钢管再生混合中长柱的轴压与偏压试验研究[J].土木工程学报,2012(5):65-77.(WU Bo,ZHAO Xinyu,ZHANG Jinsuo.Tests on slender circular thin-walled steel tubular columns filled with demolished concrete lumps under concentrically/eccentrically compressive loading[J].China civil engineering journal,2012(5):65-77.)
[15] Architectural Institute of Japan.Recommendations for design and construction of concrete filled steel tubular structures:AIJ-CFT(1997)[S].Tokyo:Architectural Institute of Japan,1997.
[16] 马欣伯,张素梅,孙玉平.日本AIJ关于圆钢管混凝土构件承载力设计方法介绍[J].工业建筑,2004,34(2):69-74.(MA Xinbo,ZHANG Sumei,SUN Yuping.Introduction to AIJ method of load-carrying capacity of concrete-filled circular steel tubes[J].Industrial construction,2004,34(2):69-74.)
[17] American Institute of Steel Construction(ASIC).Specification for structural steel buildings:AISC-LRFD(99)[S].Chicago,USA:[s.n.],2005.
[18] 哈尔滨工业大学,中国建筑科学研究院.钢管混凝土结构技术规程:CECS 28:2012 [S].北京:中国计划出版社,2012.(Harbin Institute of Technology,China Academy of Building Research.Specification for design and construction of concrete-filled steel tubular structures:CECS 28:2012 [S].Beijing:China planning press,2012.)
[19] 吴波,刘伟,刘琼祥,等.钢管再生混合短柱的轴压性能试验[J].土木工程学报,2010,43(2):32-38.(WU Bo,LIU Wei,LIU Qiongxiang,et al.Experimental study on the behavior of recycled-concrete-segment/lump filled steel tubular stub columns subjected to concentrically axial load[J].China civil engineering journal,2010,43(2):32-38.)