新型混合结构体系在超高层建筑的应用研究
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摘要
结合广州珠江新城西塔实际工程,对巨型钢管混凝土斜交网格外筒+钢筋混凝土内筒的新型混合结构体系进行了比例为1:50的微粒混凝土模型振动台试验及4根钢管混凝土柱"X"形相贯节点试验,探讨了体外预应力的施加对结构整体受力性能的影响。研究结果表明,结构模型在7度罕遇地震作用下基本可保持弹性,在8度罕遇地震作用后稍有损伤;交角对节点最终破坏形成区域及承载力影响较大,各节点的承载力均能满足设计要求;体外预应力的施加能有效地抵抗节点层平面内向外的推力,充分利用构件的受力性能。
The new hybrid structural system is introduced taking the Zhujiang Xincheng West Tower in Guangzhou as an example,which is made of huge reinforced concrete oblique-crossing-grid outer cylinder and reinforced concrete inside cylinder.The shaking table test of particle concrete model with 1∶50 scale size and the X-shaped joint test with four steel tubular columns filled with concrete were studied,and the effect of external pre-stress on the strucural holistic resistant behavior was also studied.It is shown that the model is nearly elastic under rare earthquake action with intensity Ⅶ and there is a little damage under rare earthquake action with intensity Ⅶ,and the effects of intersection angle on final failure region and load capacity are significant.The load capacity of verious joints can meet the design requirements,and the external pre-stress can resist the outward thrust force in the layer-plane of the node effectively,thus can make full use of force behavior of components.
The new hybrid structural system is introduced taking the Zhujiang Xincheng West Tower in Guangzhou as an example,which is made of huge reinforced concrete oblique-crossing-grid outer cylinder and reinforced concrete inside cylinder.The shaking table test of particle concrete model with 1∶50 scale size and the X-shaped joint test with four steel tubular columns filled with concrete were studied,and the effect of external pre-stress on the strucural holistic resistant behavior was also studied.It is shown that the model is nearly elastic under rare earthquake action with intensity Ⅶ and there is a little damage under rare earthquake action with intensity Ⅶ,and the effects of intersection angle on final failure region and load capacity are significant.The load capacity of verious joints can meet the design requirements,and the external pre-stress can resist the outward thrust force in the layer-plane of the node effectively,thus can make full use of force behavior of components.
引文
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[2]张耀春,袁振军.大型支撑框筒结构参数分析[J].哈尔滨建筑大学学报,2001,34(1):11-15.
[3]周建,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):78-91.
[4]吕西林,邹昀,卢文胜,等.上海环球金融中心大厦结构模型振动台抗震试验[J].地震工程与工程振动,2004,24(3):57-63.
[5]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(2):2-7.
[6]潘峰,简斌,王正霖.新型钢管混凝土柱节点的试验研究[J].建筑结构学报,1999,20(5):2-15.
[7]周天华,何保康,陈国津,等.方钢管混凝土柱与钢梁框架节点的抗震性能试验研究[J].建筑结构学报,2004,25(1):9-16.
[8]张大旭,张素梅.钢管混凝土梁柱节点动力性能试验研究[J].哈尔滨建筑大学学报:自然科学版,2001,34(1):21-27.
[9]吕西林,李学平.方钢管混凝土柱与钢梁连接的设计方法[J].同济大学学报:自然科学版,2002,30(1):1-5.
[10]李延和,袁爱明,王全景,等.体内外同索预应力混凝土结构研究及其应用[J].工业建筑,2006,36(2):94-97,67.
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