【作者】 王凯；

【导师】 何晴光； 贾向利；

【作者基本信息】 兰州理工大学 ， 建筑与土木工程（专业学位）， 2020， 硕士

【摘要】 悬挂建筑结构作为一种特殊的结构体系,由于能够充分发挥出高强材料的性能优势,使得结构布置灵活多变,可以很好地解决建筑功能与结构构造之间的矛盾。此外该结构体系的抗风和抗震性能良好,兼顾了建筑物实用性和艺术美,具备良好的社会和经济效益。为尽量避免悬挂建筑结构梁柱节点的破坏,本文提出了一种多层悬挂楼盖新型结构体系,该新型结构体系仅保留屋盖梁与混凝土柱的连接,而把悬挂楼盖的悬吊点设置在混凝土柱上,通过撑杆增加结构体系的侧向刚度。为研究多层悬挂楼盖新型结构体系的抗震性能,本文利用Open Sees有限元软件对该体系进行了地震响应分析,主要研究内容如下:(1)对多层悬挂楼盖结构的构造进行了介绍,并利用拉格朗日方程推导出了悬挂结构分别在悬吊一层楼盖梁和悬吊两层楼盖梁情况下的运动方程,进而以此类推,建立了悬吊多层楼盖情况下结构的运动方程。(2)基于有限元软件Open Sees分别建立了普通框架和多层悬挂楼盖结构的有限元模型,其中对多层悬挂楼盖结构的混凝土材料、钢筋材料、吊杆材料的选取,吊杆节点和楼盖与混凝土柱的连接作了详细的介绍。(3)在三条不同地震动记录的作用下,分析对比了多层悬挂楼盖结构与普通框架的抗震性能。并得出多层悬挂楼盖结构优于普通框架的抗震性能。通过改变悬挂结构楼盖梁与混凝土柱间的刚度、阻尼参数和吊杆长度,以及对比分析结构的最大层间位移、楼层最大位移、楼层最大速度和楼层最大加速度,得出多层悬挂楼盖结构的各项抗震性能参数变化规律。(4)对普通框架和多层悬挂楼盖结构进行了IDA分析,输入16条地震动记录,调整结构的地震动强度记录,得出普通框架与多层悬挂楼盖结构的最大层间位移角,然后依据所得到的数据绘制出IDA曲线图,在此基础上,对比分析普通框架与多层悬挂楼盖结构的最大层间位移角,得出了多层悬挂楼盖结构具有良好的耗能作用和自复位性能。更多还原

【Abstract】 As a special structural system,suspended building structure can give full play to the performance advantages o f high-strength materials,making the structure layout flexible and changeable,which can so lve the contradict ion between building funct ion and structural structure.In addit ion,the structure system has good wind resistance and seismic performance,taking into account the pract icab ilit y and art istic beaut y o f the building,and has good social and economic benefit s.In order to avo id the damage of the beam co lumn jo int o f the suspended building structure as much as possible,this paper proposes a new structure system of mult i-layer suspended floor,which only keeps the connect ion between the roof beam and the concrete co lumn,and sets the suspensio n po int of the suspended floor on the concrete co lumn,and increases the lateral st iffness of the structure system by the strut.In order t o study the seismic performance of a new t ype o f mult i-storey suspended floor structure system,this paper uses OPENSEES finite element so ftware to analyze the seismic response o f the system.The main research contents are as fo llows:(1)This paper introduces the structure o f the mult i-storey suspended floor structure,and deduces the mot ion equat ions o f the suspended structure in the case o f suspending one floor cover beam and two floor cover beams respect ively by using the Lagrange equat ion,and then est ablishes the mot ion equat ions of the structure in the case o f suspending mult i-storey floor by analogy.(2)Based on the finite element so ftware OPENSEES,the finite element models o f co mmo n frame and mult i-layer suspended flo or structure are established r espect ively.The select ion of concrete material,steel material and suspender material o f mult i-layer suspended floor structure,and the connect ion o f suspender node and floor and concrete column are introduced in detail.(3)Under the act ion o f three different seismic records,the seismic performance o f mult i-storey suspended floor structure and commo n frame is analyzed and co mpared.The results show that the mult i-storey suspended floor structure is better than the ordinary frame in seismic performance.B y changing the st iffness,damping parameter and suspender length between the cover beam and the concrete co lumn o f the suspended structure,and co mparing and analyzing the maximum story displacement,the maximum floor displacement,the maximum floor speed and the maximum floor acceleration o f the structure,the change rule of the seismic performance parameters of the mult i-layer suspended floor structure is obtained.(4)In this paper,the IDA analysis o f co mmo n frame and mult i-layer suspended floor structure is carried out,16 seismic records are input,the seismic intensit y records o f the structure are adjusted,the maximum inter story displacement angle of commo n frame and mult i-layer suspended floor structure is obtained,and then the IDA curve is drawn according to the data obtained.On this basis,the maximum inter stor y displacement angle of co mmo n frame and mult i-layer suspended floor structure is co mpared and analyzed The displacement angle shows that the mult i-layer suspended floor structure has goo d energy dissipat ion and self reset performance.更多还原