带桁架转换层的型钢混凝土框架结构的抗震性能分析

发布时间：2018-04-14 07:09

本文选题：转换桁架 + 型钢混凝土　；参考：《重庆大学》2015年硕士论文

【摘要】：随着社会的发展,由于人们追求快速的生活节奏和舒适的生活态度,世界各地的高层建筑变得日益丰富,满足各种功能的带转换层结构也随之快速发展起来。经过几十年的发展,带转换层结构的设计也日渐趋于成熟,特别是带转换桁架的型钢混凝土框架结构。本文的研究主要包括两个方面：第一部分是带桁架转换层的型钢混凝土框架结构在罕遇地震作用下的动力时程分析,第二部分是设置铅芯叠层橡胶支座的带桁架转换层的型钢混凝土框架结构在罕遇地震作用下的动力时程对比分析。具体分析叙述如下：口桁架转换层设置高度不同,型钢混凝土框架结构在罕遇地震作用下的动力响应也有一定的区别和规律。因此,为了分析设置不同高度的桁架转换层的型钢混凝土框架结构的抗震性能,采用SAP2000建立4个有限元结构模型,分别为桁架转换层设置在型钢混凝土框架结构的第三、四、五和六层。根据场地特征周期Tg和抗震结构的第一自振周期T1的双重指标选取的地震波,对比分析4个模型在罕遇地震作用下的层间位移、层间剪力以及绝对加速度。结果表明：桁架转换层设置高度越高,转换层以下的层间侧移越大,型钢混凝土柱的层间剪力越大,绝对加速度变化幅值越大。而在转换层附近,结构层间位移、层间剪力以及绝对加速度都有较大的突变。所以在设计带桁架转换层的型钢混凝土结构的时候,应当考虑转换层附近层间剪力突变的情况,采取合理有效的措施尽量减小突变。口为了分析设置铅芯叠层橡胶支座对不同高度的桁架转换型钢混凝土结构的减震效果,再建立4个带橡胶支座的有限元结构模型,其中模型的桁架转换层同样设置在型钢混凝土框架结构的第三、四、五和六层。根据隔震结构的第一自振周期T1的指标另外选取的地震波,进行八个模型在地震作用下的时程对比分析,研究转换桁架设置铅芯叠层橡胶支座高度时,结构在罕遇地震下的抗震性能分析。结果表明：设置铅芯叠层橡胶支座的带桁架转换层型钢混凝土框架结构的抗震性能良好,结构的层间位移、层间剪力以及绝对加速度均大大减小。
[Abstract]:With the development of society, because of people's pursuit of rapid pace of life and comfortable life attitude, high-rise buildings around the world have become increasingly rich, and the transition structure with various functions has also developed rapidly.With the development of several decades, the design of the structure with transfer layer is becoming more and more mature, especially the steel reinforced concrete frame structure with transfer truss.The research of this paper mainly includes two aspects: the first part is the dynamic time history analysis of steel reinforced concrete frame structure with truss transfer story under the action of rare earthquake.The second part is the dynamic time history comparison analysis of the steel reinforced concrete frame structure with truss transfer layer with lead laminated rubber bearing under rare earthquake.The concrete analysis and description are as follows: the dynamic response of SRC frame structure under rare earthquake also has some differences and rules.Therefore, in order to analyze the seismic behavior of steel reinforced concrete frame structure with different height truss transfer story, four finite element structural models are established by using SAP2000, which are the third and fourth of the steel reinforced concrete frame structure with truss transfer story.Five and six floors.According to the seismic waves selected by the double indexes of the site characteristic period TG and the first natural vibration period T1 of the seismic structure, the interstory displacement, interstory shear force and absolute acceleration of the four models under rare earthquake are compared and analyzed.The results show that the higher the height of the truss transfer layer, the greater the lateral displacement of the layer below the transfer layer, the greater the interstory shear force of the SRC column and the greater the amplitude of the absolute acceleration.However, in the vicinity of the transfer layer, the displacement, shear force and absolute acceleration of the structure have great abrupt changes.Therefore, when designing a steel reinforced concrete structure with a truss transfer layer, the sudden change of shear force between the layers near the transfer layer should be considered, and reasonable and effective measures should be taken to minimize the abrupt change as far as possible.In order to analyze the damping effect of lead-core laminated rubber bearing on different height truss transition steel concrete structure, four finite element structural models with rubber bearing are established.The truss transfer layer of the model is also located in the third, fourth, fifth and sixth floors of the SRC frame structure.According to the index of the first natural vibration period T1 of the isolated structure, the time history contrast analysis of the eight models under earthquake action is carried out, and the height of the lead-core laminated rubber bearing is studied when the transition truss is set.Seismic performance analysis of structures under rare earthquakes.The results show that the seismic behavior of the steel reinforced concrete frame structure with truss transfer story is good, and the interstory displacement, interstory shear force and absolute acceleration of the structure are greatly reduced.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11;TU398.9

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