震损可更换组合柱抗震性能试验研究  

Experimental study on seismic performance of innovative replaceable composite columns

作　　者：刘阳[1,2] 郭子雄[1,2] 贾磊鹏 黄群贤[1,2] 黄泽伟 LIU Yang;GUO Zixiong;JIA Leipeng;HUANG Qunxian;HUANG Zewei(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province,Huaqiao University,Xiamen 361021,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]华侨大学福建省结构工程与防灾重点实验室,福建厦门361021

出　　处：《建筑结构学报》2020年第7期45-54,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(51878304,51578254);福建省科技重大专项基金项目(2019HZ07011);福建省自然科学基金项目(2018J01074)。

摘　　要：为适应现代建筑工业化和震后结构性能快速恢复的需要,提出了一种适用于钢筋混凝土(RC)装配结构的震损可更换组合柱。进行了8个足尺可更换组合柱试件的低周往复荷载试验,研究了可替换构造和轴压比等因素对试件抗震性能的影响。研究表明:按照"强柱弱消能件"原则设计的所有试件,塑性变形均集中于可更换消能部件上,在经历了3次1/50位移角幅值作用后,仍可实现试件的损伤部件原位替换;最大位移角不超过1/50时,替换前后试件的抗震性能无明显差异,说明两种可替换构造均可实现试件的震损后性能恢复;所有试件均具有良好的延性和滞回耗能性能。采用加强型消能件构造的试件耗能性能最好;试件设计轴压比从0. 3提高到0. 5,其承载力和耗能能力均有显著提高,同时延性没有明显降低;核心方钢管锚固于地梁的可替换构造B与核心方钢管未锚固于地梁的构造A相比具有更高的承载能力,同时损伤部件的替换也更容易实现,但对连接螺栓的强度要求也更高。An innovative replaceable composite( IRC) column with two different details was proposed considering the development of industrialization for building construction and the urgent need of structural resilience after earthquake damage. Eight full scaled IRC columns were tested under low cycle reversed loads to investigate the influence of replacing details and axial compression ratio on the seismic performance of the specimens. It is indicated from the experimental results that plastic deformation is fully concentrated on replaceable energy-dissipation devices while the‘strong column-weak energy dissipation devices’ philosophy is followed. The damaged replaceable devices are successfully replaced without unloading the axial force after the specimens experience several large displacement reversals with the largest drift angle being 1/50. Below drift angle of 1/50,the seismic performance of specimens before replacement is almost identical to that of specimens after replacement,suggesting that replacing details be feasible for performance resilience of damaged structures. All IRC columns possess satisfactory ductility and hysteretic performance in general,while the specimen with enhanced replaceable devices shows better energy dissipation behavior than the others. The moment carrying capacity and energy dissipation capacity of specimens increase with the increase of design axial compression ratio from 0. 3 to 0. 5,while no obvious adverse effect can be observed on their ductility.The IRC columns with replacement detail B,whose core square steel tube is anchored to the base beam,have higher load carrying capacity and their damaged energy dissipation devices are much easier to replace,comparing with specimens with replacement detail A,whose core square steel tube rocks on the base beam. But the requirement on the anchor bolt in the base beam of specimens with detail B should be improved accordingly.

关 键 词：性能可恢复结构 组合柱 可更换构造 低周往复荷载试验 抗震性能 

分 类 号：TU375.303[建筑科学—结构工程]