水平荷载作用下高层剪力墙结构无害层间位移分析

发布时间：2018-04-06 00:09

本文选题：高层建筑　切入点：剪力墙结构　出处：《华侨大学》2013年硕士论文

【摘要】：高层建筑结构设计关键在于控制水平侧移，层间位移是反映结构变形的一个重要指标。国家规范对楼层最大层间位移与层高之比的限值作出了规定。但是对于高层剪力墙结构，根据高宽比的不同，在水平荷载作用下的变形曲线是弯剪型或弯曲型的，，其层间位移不仅包含了由于构件受力产生的位移，还包含了由于结构整体弯曲产生的位移（无害层间位移），并且随着楼层的增加，无害层间位移在层间位移中所占的比例越来越大。为了使包含无害层间位移的层间位移满足国家规范的限值，结构设计人员不得不加大结构刚度，其直接后果是结构的地震反应加大，不仅造成经济上的浪费，而且对结构抗震不利。文中重点讨论了以下内容：(1)结构层间位移的组成，有害层间位移和无害层间位移的概念，以及无害层间位移的计算方法。(2)从工作十年来所有主持设计和参与设计的高层结构的实际工程，选取其中典型的9幢高度在100m左右、高宽比在3~8之间的高层剪力墙结构，分析其最大层间位移出现的规律。(3)利用有限元分析软件ETABS (9.7.1)，分别建立了4个不同高度、不同高宽比的高层剪力墙结构模型，计算结构在水平荷载作用下的侧向位移、层间位移、有害层间位移和无害层间位移。(4)分析无害层间位移随结构高度和高宽比变化的规律、无害层间位移增长速度沿楼层变化的规律、以及在层间位移最大楼层处无害层间位移占层间位移的比例。(5)统计了最大有害层间位移出现的楼层范围，建议采用结构的有害层间位移为控制侧移刚度的指标，并可结合舒适度要求，控制结构顶点加速度。
[Abstract]:The key of high-rise building structure design is to control horizontal lateral displacement, and interstory displacement is an important index to reflect structural deformation.The national code specifies the limit value of the ratio of the maximum floor displacement to the height of the floor.However, for high-rise shear wall structures, according to the ratio of height to width, the deformation curve under horizontal load is of bending shear type or bending type, and the interstory displacement not only includes the displacement caused by the stress of the member.It also includes the displacement caused by the integral bending of the structure (harmless layer displacement), and with the increase of the floor, the ratio of the harmless layer displacement to the interstory displacement is increasing.In order to make the interstory displacement containing harmless interstory displacement meet the limit value of the national code, the structural designers have to increase the stiffness of the structure, and the direct result is that the seismic response of the structure is increased, which not only results in economic waste.Moreover, it is unfavorable to earthquake resistance of the structure.In this paper, the following contents are emphatically discussed: the composition of the structure floor displacement, the concept of the harmful layer displacement and the harmless layer displacement.And the calculation method of harmless interstory displacement. (2) from the actual engineering of all the high-rise structures designed and participated in the design over the past ten years, nine typical high-rise shear wall structures with a height of about 100 m and a aspect ratio of 3 ~ 8 are selected.By using the finite element analysis software ETABS 9.7.1, four tall shear wall structure models with different height and different aspect ratio are established to calculate the lateral displacement and interstory displacement of the structure under horizontal load.(4) to analyze the variation of harmless interstory displacement with the ratio of height and height to width of the structure, and the law of the growth rate of harmless interstory displacement along the floor.And the ratio of the harmless layer displacement to the floor displacement at the maximum floor displacement is calculated, and the floor range of the maximum harmful floor displacement is calculated. It is suggested that the harmful layer displacement of the structure be used as the index to control the lateral displacement stiffness.The acceleration of the structure vertex can be controlled in combination with the requirement of comfort.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.16

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