(北京市建筑设计研究院有限公司， 北京 100045)

［摘要］结合工程实例，分析了墙肢拉应力的影响因素，给出了核心筒墙肢型钢的设计流程。结果表明：墙肢平均名义拉应力与钢材牌号、混凝土强度等级及含钢率有关；对于采用Q235钢材的墙肢，不存在无效含钢区，采用其他钢材的墙肢均存在无效含钢区；建议Q345，Q390，Q420的界限含钢率分别为2-3%，2-1%，1-9%；根据受拉墙肢型钢设计流程可准确判断满足设计要求的墙肢含钢率，避免由于无效含钢区的存在而造成的试算、迭代，显著提高设计效率。

［关键词］超高层结构；  中震； 拉应力； 无效含钢区

中图分类号：TU973文献标识码：A文章编号：1002-848X(2016)17-0084-04

Analysis and design on tension stress of corewall in super high-rise structures under fortification earthquake

Ma Kai

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:Influencing factors on corewall tension stress were analyzed combined with practical engineering, and the design procedure of section steel in the corewall was given. The results show that the average nominal tension stress of the wall is related to steel type, concrete type and steel ratio. There is no region of ineffective steel ratio in the wall using Q235 steel but region of ineffective steel ratio is found in the wall using other types of steel. The limit steel ratio of Q345, Q390 and Q420 steel is suggested to be 2-3%, 2-1% and 1-9% respectively. The wall steel ratio meeting the design requirements is judged accurately according to the section steel design procedure of the corewall with tension forces, which can avoid trial calculation and iteration due to the existence of the region of ineffective steel ratio to improve design efficiency obviously.

Keywords:super high-rise structure； fortification earthquake； tension stress； region of ineffective steel ratio

作者简介：马凯，硕士，工程师，Email：mk-14132008@163.com。