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空冷支架结构体系抗震性能试验研究

发表时间:2018-01-31  浏览量:1146  下载量:211
全部作者: 白国良,李祥翔,樊金承,秦朝刚
作者单位: 西安建筑科技大学土木工程学院
摘 要: 为进行空冷支架结构体系的抗震性能研究,截取原型结构的1/4,按照1/8缩尺比建立试验模型,通过对模型结构输入不同峰值加速度的El-Centro地震波进行拟动力试验,之后进行拟静力试验至结构最终破坏。观察试验模型加载全过程,分析模型结构的破坏过程和构件的受力特点,得到不同加载工况下模型的时程曲线和荷载-位移滞回曲线,进而分析结构的刚度退化、滞回耗能、结构变形及构件承载能力。试验结果表明,该结构是竖向刚度和质量分布严重不均匀的竖向混合结构,柱顶节点连接部位是结构薄弱部位;结构满足侧移限值要求,但绝对位移较大,在设计与空冷支架结构相连的管道时应予以考虑。在弹塑性阶段,由于结构层间位移过大,管柱设计时的重力二阶效应不容忽视。
关 键 词: 土木建筑结构;空冷支架结构体系;拟动力试验;拟静力试验;滞回曲线;抗震性能
Title: Experimental study on seismic performance of air-cooled support structure system
Author: BAI Guoliang, LI Xiangxiang, FAN Jincheng, QIN Chaogang
Organization: School of Civil Engineering, Xi'an University of Architecture and Technology
Abstract: In order to study the seismic performance of the air-cooled support structure system, the 1/4 of the prototype structure was selected, then the 1/8 scaled experimental model was constructed. The pseudo-dynamic test of the model structure was carried out by importing the El-Centro seismic waves with different peak accelerations, and the pseudo-static test was carried out until the ultimate damage of the structure. The whole loading process of the test model was observed, and the failure process of the model structure and the stress characteristics of the structure were analyzed. The curves of the model under different loading conditions were obtained, such as the time-history curves and load-displacement hysteresis curves, then the stiffness degradation, hysteretic energy dissipation, structural deformation and bearing capacity of the components were analyzed. The test results show that the structure is a vertical mixing structure with severe uneven distribution of vertical stiffness and mass, and the joints of the column top node are weak parts of the structure. The structure satisfies the requirement of lateral shift limit, but the absolute displacement is larger, and should be considered in the piping design connected with air-cooled support structure system. In the elastoplastic stage, due to the excessive displacement between the structure layers, the second order effects of gravity can not be ignored in the design of reinforced concrete tubular column.
Key words: civil construction structure; air-cooled support structure system; pseudo-dynamic test; pseudo-static test; hysteresis curves; seismic performance
发表期数: 2018年1月第2期
引用格式: 白国良,李祥翔,樊金承,等. 空冷支架结构体系抗震性能试验研究[J]. 中国科技论文在线精品论文,2018,11(2):163-173.
 
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