分离式型钢混凝土柱抗震性能试验研究  

Experimental study on seismic performance of concrete-encased column reinforced with multiple steel sections

作　　者：赵航 黄刚 范峰[2] 包联进[3,4] 孙建运 孙飞飞[3] ZHAO Hang;HUANG Gang;FAN Feng;BAO Lianjin;SUN Jianyun;SUN Feifei(China Construction Industrial Engineering and Technology Research Academy Co.,Ltd,Beijing 101300,China;Harbin Institute of Technology,Harbin 150001,China;School of Civil Engineering,Tongji University,Shanghai 200092,China;East China Architectural Design&Research Institute,Shanghai 200011,China)

机构地区：[1]中建工程产业技术研究院有限公司,北京101300 [2]哈尔滨工业大学,黑龙江哈尔滨150001 [3]同济大学土木工程学院,上海200092 [4]华东建筑设计研究院有限公司,上海200011

出　　处：《建筑结构学报》2024年第3期123-135,共13页Journal of Building Structures

基　　金：中国建筑股份有限公司科技创新平台(CSCEC-PT-001)。

摘　　要：实腹式型钢混凝土柱被广泛应用于超高层建筑的巨型柱构件中。由于截面巨大和吊装额度限制,实腹式型钢柱段内的多条现场焊缝对巨柱的整体性和延性造成不利影响。为解决这一问题,采用彼此独立的型钢替换实腹式型钢,增加起吊段的长度,从而达到减少柱段内型钢焊缝的目的。为研究分离式型钢混凝土柱的抗震性能,对实腹式和分离式型钢混凝土柱试件进行拟静力加载,分析试件在轴力和弯矩共同作用下的承载能力、变形能力、耗能性能和刚度退化。试验结果显示:分离式型钢试件的最大水平剪力和极限变形能力与实腹式型钢试件基本相同,且具有良好的滞回耗能性能;分离式型钢试件在达到峰值剪力后抗侧刚度并未大幅衰减;在偏心率达到20%时,分离式型钢试件的截面应变分布基本满足平截面假定。Concrete-encased columns reinforced with one built-up steel core are widely used as mega columns in high-rise buildings.Due to the large size of the steel core and the limitation of lifting capacity,multiple core segments are welded and spliced on-site,which might impact the integrity and ductility of the columns.To address this issue,one method using multiple individual steel sections to replace one gigantic built-up section is proposed to increase the erection length of each segment,thus,reducing the number of splicing locations within the columns.A quasi-static cyclic lateral load was applied to the specimens to investigate the seismic performance of the columns subjected to combined vertical force and bending moment.The maximum load capacity,ultimate deformation,energy dissipation and stiffness degradation were analysed.The test results show that compared to the specimen with one steel section,the specimen with multiple steel sections exhibits similar performance in terms of maximum shear force and ultimate deformation and could dissipate considerable amount of energy under cyclic loading.Also,a sudden loss of lateral stiffness is not observed in the specimen with multiple steel sections after the peak shear force.At an eccentricity ratio of 20%,the strain distribution of the steel sections remains relatively linear,indicating that the strain compatibility is still valid.

关 键 词：型钢混凝土柱 分离式型钢 拟静力试验 抗震性能 平截面假定 

分 类 号：TU398.7[建筑科学—结构工程] TU317.1