钢筋混凝土带暗柱等肢T形柱轴压比限值调整系数的研究
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摘要
若干研究已表明设置暗柱能有效提高T形柱的延性,但迄今为止带暗柱T形柱轴压比限值的研究尚为空白,这影响了带暗柱T形柱的工程应用。文中采用非线性全过程数值计算方法,计算了不同肢长、不同抗震等级下带暗柱与不带暗柱钢筋混凝土等肢T形柱在不同纵向受力钢筋配筋率和不同体积配箍率时的截面曲率延性比;根据《混凝土异形柱结构技术规程》(JGJ149-2006)给出的各抗震等级下对异形柱截面曲率延性比的要求,确定了带暗柱与不带暗柱的等肢T形柱的轴压比限值,进而求出两者同一肢长下轴压比限值的比值;最后通过回归分析得到了带暗柱等肢T形柱轴压比限值的调整系数公式。利用此公式并根据《规程》JGJ149-2006中规定的不带暗柱T形柱的轴压比限值即可求出带暗柱等肢T形柱的轴压比限值。
Lots of studies show that the concealed column can improve the ductility of T-shaped column,but study on the limit values of axial compression ratios of the T-shaped column with concealed column hasn't mentioned.Based on the nonlinear analysis method of complete response process,cross-section curvature ductility ratios of the equilimb T-shaped columns with and without concealed column under different conditions are calculated,according to curvature ductility ratio of each anti-seismic grade by "Technical Specification for Concrete Structures with Specially Shaped Column"(JGJ 149-2006),the limit-value ratios of the axial pressure ratios of the both T-shaped columns are calculated,then the equation of adjustment coefficient through regression analysis is gained.According to the limit values of the axial compression ratios of equilmb T-shaped column without concealed column from Specification JGJ-149-2006,the limit values of axial compression ratios of equiaxial T-shaped column with concealed column can be obtained by using the equation.
Lots of studies show that the concealed column can improve the ductility of T-shaped column,but study on the limit values of axial compression ratios of the T-shaped column with concealed column hasn't mentioned.Based on the nonlinear analysis method of complete response process,cross-section curvature ductility ratios of the equilimb T-shaped columns with and without concealed column under different conditions are calculated,according to curvature ductility ratio of each anti-seismic grade by "Technical Specification for Concrete Structures with Specially Shaped Column"(JGJ 149-2006),the limit-value ratios of the axial pressure ratios of the both T-shaped columns are calculated,then the equation of adjustment coefficient through regression analysis is gained.According to the limit values of the axial compression ratios of equilmb T-shaped column without concealed column from Specification JGJ-149-2006,the limit values of axial compression ratios of equiaxial T-shaped column with concealed column can be obtained by using the equation.
引文
[1]JGJ149-2006,混凝土异形柱结构技术规程[S].JGJ149-2006,Technical Specification for Concrete Structures with Specially Shaped Columns[S].
[2]曹万林,庞国新,吴二军,等.钢筋混凝土带暗柱T形柱抗震性能实验研究[J].世界地震工程,1999,15(3):47-51.Cao Wanlin,Pang Guoxin,Wu Erjun,et al.Testing study on seismic behavior of R.C T-shaped column with concealed column[J].World Earth-quake Engineering,1999,15(3):47-51.
[3]曹万林,胡国振.钢筋混凝土带暗柱异形柱抗震性能试验及分析[J].建筑结构学报,2002,23(1):16-20.Cao Wanlin,Hu Guozhen.Experiment and analysis of seismic behavior of the十,L,T-shaped columns with concealed columns[J].Journal ofBuilding Structures,2002,23(1):16-20.
[4]宋佳璐,张翼,张新培,等.保护层厚度对钢筋混凝土等肢异形柱延性性能的影响[J].世界地震工程,2009,25(1):131-137.Song Jialu,Zhang Yi,Zhang Xinpei,et al.Effect of concrete casing thickness on ductility of equip-limb specially shaped columns[J].WorldEarthquake Engineering,2009,25(1):131-137.
[5]王依群,许贻懂,陈云霞.钢筋混凝土异形柱的轴压比限值与配箍构造[J].天津大学学报,2006,39(3):295-300.Wang Yiqun,Xu Yidong,Chen Yunxia.Limited value of axial compression ratio and detailing requirements for stirrup of special shaped RC col-umn[J].Journal of Tianjin University,2006,39(3):295-300.
[6]许贻懂,赵艳静,陈云霞.不等肢异形柱延性性能及轴压比限值[C].混凝土异形柱结构理论与应用.北京:知识产权出版社,2006:32?41.Xu Yidong,Zhao Yanjing,Chen Yunxia.Ductility and ultimate axial compression ratio of in-equal axial special-shaped columns[C].Theory andApplication of Special-shaped Columns.Beijing:Intellectual Property Press,2006:32-41.
[2]曹万林,庞国新,吴二军,等.钢筋混凝土带暗柱T形柱抗震性能实验研究[J].世界地震工程,1999,15(3):47-51.Cao Wanlin,Pang Guoxin,Wu Erjun,et al.Testing study on seismic behavior of R.C T-shaped column with concealed column[J].World Earth-quake Engineering,1999,15(3):47-51.
[3]曹万林,胡国振.钢筋混凝土带暗柱异形柱抗震性能试验及分析[J].建筑结构学报,2002,23(1):16-20.Cao Wanlin,Hu Guozhen.Experiment and analysis of seismic behavior of the十,L,T-shaped columns with concealed columns[J].Journal ofBuilding Structures,2002,23(1):16-20.
[4]宋佳璐,张翼,张新培,等.保护层厚度对钢筋混凝土等肢异形柱延性性能的影响[J].世界地震工程,2009,25(1):131-137.Song Jialu,Zhang Yi,Zhang Xinpei,et al.Effect of concrete casing thickness on ductility of equip-limb specially shaped columns[J].WorldEarthquake Engineering,2009,25(1):131-137.
[5]王依群,许贻懂,陈云霞.钢筋混凝土异形柱的轴压比限值与配箍构造[J].天津大学学报,2006,39(3):295-300.Wang Yiqun,Xu Yidong,Chen Yunxia.Limited value of axial compression ratio and detailing requirements for stirrup of special shaped RC col-umn[J].Journal of Tianjin University,2006,39(3):295-300.
[6]许贻懂,赵艳静,陈云霞.不等肢异形柱延性性能及轴压比限值[C].混凝土异形柱结构理论与应用.北京:知识产权出版社,2006:32?41.Xu Yidong,Zhao Yanjing,Chen Yunxia.Ductility and ultimate axial compression ratio of in-equal axial special-shaped columns[C].Theory andApplication of Special-shaped Columns.Beijing:Intellectual Property Press,2006:32-41.
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