连柱支撑钢结构抗震性能研究

发布时间：2018-01-30 04:40

本文关键词： 连柱耗能段中心支撑时程分析 Pushover分析　出处：《苏州科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：连柱支撑钢结构是一种新的抗侧力结构体系,通过耗能梁段连接支撑钢框架的毗邻双柱构成。地震作用下耗能梁段首先进入塑性耗能,震后,破坏的耗能梁段易于替换,修复成本较低,维修时间短,可减少建筑功能使用中断造成的经济损失。对连柱支撑钢结构抗震性能进行分析,并对耗能段如何影响结构的抗震性能提出建议,具有工程应用价值。本文共设计11个模型,分以下4部分进行研究:1)对连柱支撑钢结构与K形偏心支撑钢框架进行Pushover对比分析,与K形偏心支撑相比,连柱支撑钢结构具有优良的抗震性能。2)分析了耗能段长度对连柱支撑钢结构抗震性能的影响,分析表明在一定范围内耗能段越长,其转角越小,结构的层间位移角越小。3)分析了不同高度连柱支撑钢结构抗震性能,分析表明连柱的约束作用使得所有耗能段都能够耗散地震能量,从而使主体结构保持在弹性范围;连柱支撑钢结构提高了结构的抗侧刚度,使层间位移角和层最大位移较小。4)研究连柱和支撑的布置位置对结构抗震性能的影响,分析表明当连柱和支撑布置在结构中间时,连柱支撑钢结构的抗震性能优于其它布置方式。经过研究分析,连柱支撑钢结构支撑最好选用X形中心支撑,连柱和支撑优先选择布置在结构中间,耗能段线刚度与层刚度比值应在0.15~0.4之间。
[Abstract]:Continuous column braced steel structure is a new kind of lateral force resisting structure system, which is composed of two columns adjacent to steel frame connected by energy dissipation beam section. Under earthquake action, energy dissipation beam section first enters plastic energy dissipation, and after earthquake. The damaged energy-consuming beam section is easy to replace, the repair cost is low, the repair time is short, and the economic loss caused by the interruption of building function can be reduced. The seismic performance of steel structure supported by connecting columns is analyzed. Some suggestions on how to affect the seismic performance of the structure in the energy dissipation section are put forward, which are valuable for engineering application. 11 models are designed in this paper. The following four parts are divided into four parts: (1) the Pushover analysis of steel frame with connecting column braced steel and K eccentrically braced steel frame is carried out, which is compared with that of K-shaped eccentric bracing. The influence of the length of the energy dissipation section on the seismic behavior of the steel structure with continuous column bracing is analyzed. The analysis shows that the longer the energy dissipation section in a certain range, the smaller the turning angle. The smaller the interstory displacement angle of the structure is. 3) the seismic behavior of steel structures with different heights is analyzed. The analysis shows that the constraint of the connecting columns can dissipate the seismic energy of all the energy dissipation sections. In order to keep the main body structure in the elastic range; The lateral stiffness of steel structure with continuous column brace is improved, and the displacement angle and maximum displacement of story are smaller. 4) the influence of the arrangement of connecting column and bracing on the seismic performance of the structure is studied. The analysis shows that the aseismic performance of steel structure is better than that of other layout when the connecting column and bracing are arranged in the middle of the structure. The connecting column and bracing are preferentially arranged in the middle of the structure, and the ratio of line stiffness to floor stiffness of the energy dissipation section should be between 0.150.4.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU391;TU352.11

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