- 摘 要
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(深圳市建筑设计研究总院有限公司, 深圳 518031)
[摘要]喀什国际免税广场A塔为位于设防烈度为8度(0.30g)地区的超高层建筑。针对结构超限情况,设计中采取相应的抗震设防措施,设定合适的性能目标,通过结构在小震、中震和大震作用下的分析,验算各构件在地震作用下的性能,实现对结构的性能化设计。结果表明:结构在小震下各构件均处于弹性状态;中震下重要的竖向构件保持弹性,耗能构件部分屈服;在大震动力弹塑性分析中结构实现支撑先屈服,然后外筒裙梁屈服,最后个别柱子出现塑性应变的屈服机制,各构件均能满足预定的性能要求。转换节点在大震中实现不屈服的性能目标。
[关键词]超高层建筑; 钢结构; 性能化设计; 性能目标; 抗震措施
中图分类号:TU973.3+1 文献标识码:A 文章编号:1002-848X(2014)16-0007-06
Performance-based seismic design on the ultra high-rise steel structure of tower A of Kaishi International Duty-free Plaza
Liu Qiongxiang, Wang Qiwen, Zhang Jianjun, Zhou Bin, Luo Riwang, Yang Wanghua
(Shenzhen General Institute of Architectural Design and Research Co., Ltd., Shenzhen 518031, China)
Abstract: Tower A of Kaishi International Duty-free Plaza is an ultra high-rise building and the seismic fortification intensity is 8 degree (0.30g). Appropriate seismic strengthening measures were adopted in response to the code-exceeding aspects of the structure. All the performance objectives were set in advance. The structural performance design was executed by checking the performance of each component under different seismic conditions. The results show that the structure is in elastic situation under the frequent earthquake. The important vertical components maintain elastic while a part of energy dissipation components are yielded under the intensity earthquake. The progressively yield mechanism are realized in the progress of dynamic elastic-plastic analysis under rare earthquake, in which the braces yield firstly, beams yield next, very few columns yield finally. All the components can satisfy the performance objective. The transfer joint unyielded under rare earthquake.
Keywords: ultra high-rise building; steel structure; performance-based design; performance objective; seismic strengthening measure
作者简介:刘琼祥,教授级高级工程师,Email:yangwanghua2012@gmail.com。
参考文献
[1]GB 50223—2008 建筑工程抗震设防分类标准[S].北京:中国建筑工业出版社,2008.
[2]喀什发展大厦片区国际免税广场项目工程场地地震安全性评价报告[R].乌鲁木齐:新疆防御自然灾害研究所,2013.
[3]GB 50011—2010 建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]建质[2010]109号超限高层建筑工程抗震设防专项审查技术要点[S].2010.
[5]刘琼祥,王启文,张建军,等.喀什国际免税广场A塔超高层钢结构设计[J].建筑结构,2014,44(16):1-6.
[6]JGJ 3—2010 高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2011.
[7]喀什国际免税广场结构超限设计可行性报告[R].深圳:深圳市建筑设计研究总院有限公司,2010.
[8]GB 50010—2010 混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.
[9]CECS 159∶2004 矩形钢管混凝土结构技术规程 [S].北京:中国计划出版社,2004.
[10]韩林海. 钢管混凝土结构:理论与实践[M].北京:科学出版社,2004.