钢管混凝土斜交网格结构性能分析
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摘要
以广州西塔为工程背景,建立了圆筒钢管混凝土斜交网格结构模型,分析了斜柱倾角对结构周期、侧移、竖向刚度和内外筒的弯矩和剪力分配的影响,探讨了核心筒剪力墙厚度对结构性能的影响。结果表明:高宽比大于5的圆筒斜交网格结构的最优斜交角度介于68°～78°;随着斜柱倾角的减小,结构抗侧刚度下降,下部楼层刚度突变明显;随着核心筒墙厚的增加,结构自振周期略有增大,内外筒的基底剪力与弯矩分配更加合理。
The analysis model of concrete-filled steel tubular(CFST) diagrid structure in this paper is conducted on the basis of design for Guangzhou West Tower.The influences of diagonal angle on structural period,displacement,stiffness irregularity,shear force and moment distribution between CFST tube and concrete core wall are analyzed.The effects of thickness of core wall on structural performance are also investigated.The analysis results indicate that the optimal diagonal angle is between 68° and 78° when the structural depth-width ratio is greater than 5.Decreasing diagonal angle would induce the structural irregularity and reduction of the structural stiffness.In addition,shear force and moment distribution become more rational by increasing the thickness of core wall.
The analysis model of concrete-filled steel tubular(CFST) diagrid structure in this paper is conducted on the basis of design for Guangzhou West Tower.The influences of diagonal angle on structural period,displacement,stiffness irregularity,shear force and moment distribution between CFST tube and concrete core wall are analyzed.The effects of thickness of core wall on structural performance are also investigated.The analysis results indicate that the optimal diagonal angle is between 68° and 78° when the structural depth-width ratio is greater than 5.Decreasing diagonal angle would induce the structural irregularity and reduction of the structural stiffness.In addition,shear force and moment distribution become more rational by increasing the thickness of core wall.
引文
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[7]黄超,韩小雷,季静,等.斜交网格结构体系的参数分析及简化计算方法研究[J].建筑结构学报,2010,31(1):70-77.
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[2]傅学怡,吴兵,等.卡塔尔某超高层建筑结构设计[J].深圳大学学报:理工版,2007,24(1):1-8.
[3]Charles Besjak,Bonghwan Kim,Preetam Biswas.555 m Tall LotteSuper Tower,Seoul,Korea[C]//Proceedings of the 2009 Struc-tures Congress.2009.
[4]Kyung Sun Moon.Practical Design Guidelines for Steel DiagridStructures[C]//Proceedings of the AEI 2008 conference.2008.
[5]周健,汪大绥.高层斜交网格结构体系的性能研究[J].建筑结构,2007,37(5):87-91.
[6]韩小雷,唐剑秋,等.钢管混凝土巨型斜交网格筒体结构非线性分析[J].地震工程与工程振动,2009,29(4):77-84.
[7]黄超,韩小雷,季静,等.斜交网格结构体系的参数分析及简化计算方法研究[J].建筑结构学报,2010,31(1):70-77.
[8]张崇厚,赵丰.高层斜交网筒结构体系抗侧性能相关影响因素分析[J].土木工程学报,2009,42(11):41-46.
[9]广州珠江新城西塔初步设计说明结构篇[R].广州:ARUP&华南理工建筑设计研究院,2006.
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