柱截面配筋对空间异形柱框架结构性能的影响
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摘要
运用空间异形柱框架结构的非线性有限元分析方法,对该框架作适当的单元划分,并用子结构法提高计算效率,运用分区离散截面法来完成对异形截面的分离与组合。通过对不同柱截面配筋形式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,获得异形柱框架结构在破坏过程、承载力、延性、侧向位移、扭转、滞回性能及刚度退化等各方面的结构性能受柱截面配筋形式的影响规律。纵筋较集中在截面端部时,框架极限承载力较好,但要实现较好的延性,则需要根据柱轴压比情况在截面上适当布置纵筋。
Utilizing the nonlinear finite analysis method for the 3D-frame with special-shaped columns the structure performance is studied such as failure process,bearing capacity,ductility,lateral displacement,torsion,hysteretic performance and stiffness degeneracy.To increase computational efficiency,the substructure method and zonal discrete section method are applied to separate and fabricate the special-section of the column.The influence regularity on structure performance of the 3D-frame by distribution of reinforcement in column is discovered after the 3D-frame was analyzed by push-over under horizontal loading with various directions.The frame has better bearing capacity while more reinforcing bars located in the periphery of column section.The frame can have better ductility while reinforcing bars properly distributed in column section according to axial compression ratio.
Utilizing the nonlinear finite analysis method for the 3D-frame with special-shaped columns the structure performance is studied such as failure process,bearing capacity,ductility,lateral displacement,torsion,hysteretic performance and stiffness degeneracy.To increase computational efficiency,the substructure method and zonal discrete section method are applied to separate and fabricate the special-section of the column.The influence regularity on structure performance of the 3D-frame by distribution of reinforcement in column is discovered after the 3D-frame was analyzed by push-over under horizontal loading with various directions.The frame has better bearing capacity while more reinforcing bars located in the periphery of column section.The frame can have better ductility while reinforcing bars properly distributed in column section according to axial compression ratio.
引文
[1]曹云中,干钢,唐锦春.柱肢长宽比对空间异形柱框架抗震性能的影响[J].工程力学,2007,24(4):118-123.
[2]曹万林,田宝发,尹恩太,等.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.
[3]《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,1999,29(1):7-10.
[4]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.
[5]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):726-741.
[6]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.
[2]曹万林,田宝发,尹恩太,等.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.
[3]《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,1999,29(1):7-10.
[4]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.
[5]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):726-741.
[6]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.
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