正定综合服务中心高层连体结构抗震抗风分析

发布时间：2018-04-03 08:35

本文选题：高层建筑　切入点：连体结构　出处：《天津大学》2014年硕士论文

【摘要】：由于城市景观和建筑功能的需要,新颖结构形式日益俱增,高层连体结构就是其中最典型的一类。该类结构体系的特点是连体部位位于高空,主体塔楼与连体结构形成较强的空间耦联作用,其受力性能要比一般高层建筑结构复杂得多。正定综合服务中心工程中的高层建筑在其顶部设置75.6m大跨度连接体钢桁架,钢桁架结构宽14.45m,侧向悬挑长度7.45m。该高层连体建筑结构复杂,平面和竖向均不规则,在地震作用下动力响应较强,扭转效应明显;另外,工程所处场地开阔、结构体型对风荷载敏感。本文对正定综合服务中心工程高层连体结构抗震抗风性能进行了分析,主要工作如下:(1)确定了钢桁架连接体与两端塔楼的刚性连接方式;(2)采用SATWE设计软件分别对单塔结构模型和双塔连体结构模型进行了结构自振特性和模态分析,并比较了计算结果,两者吻合较好;分别采用SATWE和SAP2000软件对高层连体结构进行了地震作用下的弹性时程和弹塑性时程分析,得到了地震作用下连体结构的动力响应规律;找出了结构的抗震薄弱环节,提出了相应的加强措施;(3)进行了高层连体结构的风洞试验,得到了高层连体结构的风压分布规律和最大值,为工程设计提供了风荷载建议值。
[Abstract]:Due to the need of urban landscape and architectural functions, new structural forms are increasing day by day, and the high-rise conjoined structure is the most typical one.The characteristics of this kind of structure system are that the joint part is located in the upper air, and the main tower and the connected structure form a strong spatial coupling, and its mechanical performance is much more complicated than that of the general high-rise building structure.75.6 m long span steel truss is installed on the top of the high-rise building in Zhengding integrated service center project. The steel truss structure is 14.45m wide and the lateral cantilever length is 7.45m.The high-rise contiguous building has complex structure, irregular plane and vertical direction, strong dynamic response and obvious torsional effect under earthquake. In addition, the site of the project is open and the structure shape is sensitive to wind load.In this paper, the aseismic and wind-resistant performance of high-rise conjoined structures in Zhengding Integrated Service Center is analyzed.The main work is as follows: (1) the rigid connection mode between the steel truss connection and the two ends tower is determined. (2) the structural natural vibration characteristics and modal analysis of the single tower structure model and the double tower connected structure model are carried out by using SATWE design software, respectively.The calculated results are in good agreement with each other, and the elastic time history and elastic-plastic time history analysis of high-rise connected structures are carried out by using SATWE and SAP2000 software respectively, and the dynamic response law of the connected structures under earthquake action is obtained.The weak link of seismic resistance of the structure is found out, and the corresponding strengthening measures are put forward. The wind tunnel test of the high-rise connected structure is carried out, and the law of wind pressure distribution and the maximum value of the wind pressure are obtained, which provides the suggested value of wind load for the engineering design.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.3

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