柱肢长宽比对空间异形柱框架抗震性能的影响
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摘要
针对空间异形柱框架具有柱横截面不规则等特点,提出适用于该结构非线性有限元分析的方法。对该框架作适当的单元划分,并用子结构法及静力凝聚法提高计算效率,得到简化计算模型。在该模型中,运用分区离散截面法及主从系统中的偏心转化法来完成对异形截面的分离与组合。将该计算模型与单向及反复推覆分析方法相结合,探讨了空间异形柱框架结构抗震性能的分析方法,并验证了其有效性。通过对不同柱肢长宽比的空间异形柱框架在不同方向水平荷载作用下的推覆分析,获得柱肢长宽比对该框架抗震性能的影响规律。
Nonlinear finite element analysis for 3D-frames with special-section columns is presented considering the frame features such as irregular cross-section of the columns. The frame was divided into elements properly; substructure and static condensation were utilized to increase computational efficiency. A simplified calculation model was obtained in which zonal discrete section method and eccentricity transition matrix in master-slave systems were applied to separate and fabricate the special-section of the column. Based on the model, the method to analyze aseismic performance of the 3D-frame with special-section column was set up by PUSH-OVER method under the unilateral and reversed cyclic loadings. The proposed method was verified. The 3D-frame with various length-width ratios of column limb was analyzed by PUSH-OVER under loading in various horizontal directions. The influence of length-width ratio of column limb on aseismic performance of the 3D-frame was discovered.
Nonlinear finite element analysis for 3D-frames with special-section columns is presented considering the frame features such as irregular cross-section of the columns. The frame was divided into elements properly; substructure and static condensation were utilized to increase computational efficiency. A simplified calculation model was obtained in which zonal discrete section method and eccentricity transition matrix in master-slave systems were applied to separate and fabricate the special-section of the column. Based on the model, the method to analyze aseismic performance of the 3D-frame with special-section column was set up by PUSH-OVER method under the unilateral and reversed cyclic loadings. The proposed method was verified. The 3D-frame with various length-width ratios of column limb was analyzed by PUSH-OVER under loading in various horizontal directions. The influence of length-width ratio of column limb on aseismic performance of the 3D-frame was discovered.
引文
[1]曹万林,田宝发,尹恩太,高树军.钢筋混凝土异形柱非线性全过程分析概述[J].世界地震工程,1996,11(4):25~30.Cao Wanlin,Tian Baofa,Yin Entai,Gao Shujun.A summary of nonlinear analysis in full path on special-shaped reinforced concrete columns[J].World Information on Earthquake Engineering,1996,11(4):25~30.(in Chinese)
[2]Dundar C,Sahin B.Arbitrarily shaped reinforced concrete members subject to biaxial bending and axial load[J].Comput.&Struct.,1993,49(4):643~662.
[3]Cheng-Tzu Thomas Hsu.T-shaped reinforced concrete members under biaxial bending and axial compression[J].ACI Structural Journal,1989,86(4):460~468.
[4]Mallikarjuna,Mahadevappa P.Computer aided analysis of reinforced concrete columns subjected to axial compression and bending-II:T-shaped section[J].Comput.&Struct.,1994,53(6):1317~1356.
[5]《规程》编制组.天津市异形柱框轻结构的研究及技术规程编制[J].建筑结构,1999,1:7~10.Compiler of Specification.Study and compilation of Tianjin technical specification for lightweight framed structures with special-shaped columns[J].Building Structure,1999,1:7~10.(in Chinese)
[6]曹万林,王绍英,胡国振.大开间异型柱框架弹塑性工作性能研究[J].世界地震工程,2000,16(1):40~46.Cao Wanlin,Wang Shaoying,Hu Guozhen.On elastoplastic performance of frames with special-shaped columns of large bays[J].World Information on Earthquake Engineering,2000,16(1):40~46.(inChinese)[7]曹云中,干钢,唐锦春.预应力混凝土异形柱框架结构性能的研究[J].浙江大学学报工学版,2004,38(6):736~741.Cao Yunzhong,Gan Gang,Tang Jinchun.Study on structural performance of prestressed concrete frame with special-section column[J].Journal of Zhejiang University(Engineering Science),2004,38(6):736~741.(in Chinese)
[8]朱杰江,吕西林,容柏生.复杂体型高层结构的推覆分析方法和应用[J].地震工程与工程振动,2003,3(2):26~35.Zhu Jiejiang,Lu Xilin,Rong Baisheng.Push-over analysis method and its application to RC tall building with complex structural type[J].Earthquake engineering and engineering vibration,2003,3(2):26~35.(in Chinese)
[9]刘军进,张晋,吕志涛.静力弹塑性分析(Push-over)方法在模拟伪静力试验方面的应用[J].建筑结构,2002,32(8):63~65.Liu Junjin,Zhang Jin,Lu Zhitao.Application of the method of nonlinear static analysis(Push-over)on simulating pseudostatic experiment[J].Building Structure,2002,32(8):63~65.(in Chinese)
[10]崔慈艳,郑作樵.水平荷载下底层抽柱的异形柱框架受力分析[J].福州大学学报(自然科学版),1999,27(6):56~60.Cui Ciyan,Zheng Zuoqiao.Performance analysis of frame with special-shaped columns subjected to horizontal loadings[J].Journal of Fuzhou University(Natural Science),1999,27(6):56~60.(in Chinese)
[2]Dundar C,Sahin B.Arbitrarily shaped reinforced concrete members subject to biaxial bending and axial load[J].Comput.&Struct.,1993,49(4):643~662.
[3]Cheng-Tzu Thomas Hsu.T-shaped reinforced concrete members under biaxial bending and axial compression[J].ACI Structural Journal,1989,86(4):460~468.
[4]Mallikarjuna,Mahadevappa P.Computer aided analysis of reinforced concrete columns subjected to axial compression and bending-II:T-shaped section[J].Comput.&Struct.,1994,53(6):1317~1356.
[5]《规程》编制组.天津市异形柱框轻结构的研究及技术规程编制[J].建筑结构,1999,1:7~10.Compiler of Specification.Study and compilation of Tianjin technical specification for lightweight framed structures with special-shaped columns[J].Building Structure,1999,1:7~10.(in Chinese)
[6]曹万林,王绍英,胡国振.大开间异型柱框架弹塑性工作性能研究[J].世界地震工程,2000,16(1):40~46.Cao Wanlin,Wang Shaoying,Hu Guozhen.On elastoplastic performance of frames with special-shaped columns of large bays[J].World Information on Earthquake Engineering,2000,16(1):40~46.(inChinese)[7]曹云中,干钢,唐锦春.预应力混凝土异形柱框架结构性能的研究[J].浙江大学学报工学版,2004,38(6):736~741.Cao Yunzhong,Gan Gang,Tang Jinchun.Study on structural performance of prestressed concrete frame with special-section column[J].Journal of Zhejiang University(Engineering Science),2004,38(6):736~741.(in Chinese)
[8]朱杰江,吕西林,容柏生.复杂体型高层结构的推覆分析方法和应用[J].地震工程与工程振动,2003,3(2):26~35.Zhu Jiejiang,Lu Xilin,Rong Baisheng.Push-over analysis method and its application to RC tall building with complex structural type[J].Earthquake engineering and engineering vibration,2003,3(2):26~35.(in Chinese)
[9]刘军进,张晋,吕志涛.静力弹塑性分析(Push-over)方法在模拟伪静力试验方面的应用[J].建筑结构,2002,32(8):63~65.Liu Junjin,Zhang Jin,Lu Zhitao.Application of the method of nonlinear static analysis(Push-over)on simulating pseudostatic experiment[J].Building Structure,2002,32(8):63~65.(in Chinese)
[10]崔慈艳,郑作樵.水平荷载下底层抽柱的异形柱框架受力分析[J].福州大学学报(自然科学版),1999,27(6):56~60.Cui Ciyan,Zheng Zuoqiao.Performance analysis of frame with special-shaped columns subjected to horizontal loadings[J].Journal of Fuzhou University(Natural Science),1999,27(6):56~60.(in Chinese)
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