【作者】 唐峻；

【导师】 李英民； 杨强；

【作者基本信息】 重庆大学 ， 建筑与土木工程， 2006， 硕士

【摘要】 现代高层建筑常因建筑功能及立面的要求而出现各类非规则结构形式。其中扭转不规则问题较为突出和常见。此类建筑的延性较差,地震时结构扭转破坏具有突发性,震害严重,因此设计中必须对结构的扭转效应进行控制。“高规”通过扭转周期比和扭转位移比双重控制指标对结构扭转效应进行控制。复杂非规则结构设计中如何采取措施以同时满足两个控制指标是每个结构设计者必须面临的问题,也是较难处理的问题,因此对其进行研究是十分必要的。本文首先探讨了结构扭转的影响因素,对国内外关于扭转问题研究现状进行了综述,并阐述了我国现行规范对结构扭转控制的相关规定。随后以重庆某一偏心裙房高层建筑为例,对其进行抗扭设计,经过大量的方案计算比选,得到了合适的满足抗扭设计要求的结构方案,并在此基础上探讨了偏心裙房高层建筑抗扭控制方法。通过以上分析研究得出的主要成果有:①非规则高层建筑结构设计必须按照规范规定的扭转周期比和扭转位移比双重扭转指标进行控制。当不满足要求时,可采取措施调整结构布置,通过“均匀、分散、对称、周边”的布置原则重新布置剪力墙,使得结构平面的质心和刚心尽量接近。如果结构的平动刚度过大,而转动刚度不够的时候,就不仅要在结构周边增加剪力墙以增加结构的扭转刚度,同时也要减小结构平面中部的剪力墙数量以及厚度,以减小结构的平动刚度。②对重庆某偏心裙房结构进行抗扭设计,给出了满足要求的抗扭结构设计方案。③探讨了偏心裙房结构的抗扭控制设计。对于偏心裙房高层建筑结构应尽量调整上部塔楼刚心与质心接近,且应尽量与裙房刚心接近,即刚心应尽量在一竖直线上,而不是分别调整每层的刚心、质心接近。若裙房部分扭转位移比调整确有困难,且层间位移远小于规范限值(如为1/3～1/5)时,建议可适当放宽扭转位移比要求。具体放宽量值有待深入研究。更多还原

【Abstract】 Modern high-rise buildings usually occurred with different irregular structure due to the special requirement of function and facade effect. Hereinto, the problem of irregular torsion is especially outstanding and common. The tensibility of these buildings is not very good, so the structural torsional destroy is usually outburst without premonition and lead to grave destroy once earthquake occurred, then we must control the torsional effect of structure during the course of design. JGJ3-2002 controls the structural torsional effect with torsional period ratio and torsional displacement ratio these two indexes. How to satisfy the two controls with certain measures during the structural design is inevitable to all structural designers and a hard problem to deal with, so it is quite necessary to implement the research.This paper probes into the effect factors of structural torsion first, and then summarizes research status about torsional problems in and outside of China, as well as expounds the current relative regulations for structural torsion control. This paper takes one high-rise building with eccentric annexes of Chongqing for example to implement structural torsion design. After a series of comparison and election to several programs, this design gets an appropriate program meet the requirements of structural design and probes into torsion control to high-rise buildings with eccentric annexes based on the program.With the analysis and research above, the main achievements of this paper are as follows:①The design to high-rise buildings with irregular structure must be controlled with torsional period ratio and torsional displacement ratio these two indexes. The designer should adapt measures to adjust the structure arrangement when the two indexes are not satisfied by rearranging the shear walls according to the principle of equality, decentralization, symmetry and surrounding to make horizontal mass center and stiffness centre near. If the structure translational stiffness is too big while the rotational stiffness is not enough, we should not only add shear walls at the periphery of the structure to increase the structure torsional stiffness, but also reduce the amount and thickness of shear walls in the middle of the structure to decrease the translational stiffness.②Implement torsional design for a building with eccentric annexes, and put更多还原