Experimental Research on Seismic Performance of Partially-Encased Steel-Concrete Composite Columns with Cross-Shaped Sections
-
摘要: 进行了3个十字形截面部分包覆钢-混凝土组合柱(简称“十字形PEC柱”)在恒定竖向荷载和往复水平加载下的试验研究,试件包括1个主钢件为实腹钢的柱(简称“实腹钢十字形PEC柱”)、2个轴压比不同且主钢件为腹板开孔的蜂窝钢的柱(简称“蜂窝钢十字形PEC柱”),考察主钢件腹板开孔、轴压比对十字形PEC柱抗震性能的影响。研究结果表明:十字形PEC柱的破坏特征均为混凝土压碎并伴随钢翼缘弹塑性屈曲,最终呈现为压弯破坏模式;3个试件的荷载-位移滞回曲线均较为饱满,同一加载级下的各个滞回环几乎重合,表现出良好的耗能能力和承载力稳定性;相同轴压力情况下,实腹钢十字形PEC柱的承载力、弹性抗侧刚度、延性和耗能能力均强于蜂窝钢十字形PEC柱;随着轴压比的增加,蜂窝钢十字形PEC柱的承载力和抗侧刚度增加,但延性和变形能力明显降低,耗能能力也降低;全截面塑性理论可较好地估计十字形PEC柱的单向压弯承载力。
-
关键词:
- 部分包覆钢-混凝土组合柱 /
- 十字形截面柱 /
- 抗震性能 /
- 承载力 /
- 延性和耗能
Abstract: Experimental investigations were conducted on three partially-encased composite steel-concrete column specimens with cross-shaped sections (short for cross-shaped PEC columns) under constant vertical load and cyclic horizontal loading. The specimens consisted of one PEC column with a main steel component (MSC) of solid web steel (short for SWS cross-shaped PEC column) and two PEC columns with MSCs of honeycomb steel (short for HS cross-shaped PEC columns) having different axial compression ratios. The effects of the MSC web opening and the axial compression ratios on the seismic performance of cross-shaped PEC columns were investigated. The results showed that the failure characteristics of the PEC columns were concrete crushing accompanied by elastic-plastic buckling of the compression flange, ultimately leading to a compression-bending failure mode. The load-displacement hysteresis curves of the column specimens were full, and the hysteresis loops under different cycle numbers at the same loading stage (same amplitude) were nearly identical, indicating that the PEC columns exhibited good energy dissipation capacity and bearing capacity stability.The bearing capacity, elastic lateral stiffness, ductility, and energy dissipation capacity of the SWS cross-shaped PEC column were higher than those of the HS cross-shaped PEC columns under the same axial compression force. With the increase in axial compression ratio, the bearing capacity and lateral stiffness of HS cross-shaped PEC columns increased, but the ductility and deformation capacity decreased significantly, and the energy dissipation capacity also decreased. The full-section plasticity theory could effectively predict the bearing capacity of the cross-shaped PEC columns under uniaxial bending. -
[1] 方有珍,马吉,陆承铎,等. 新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究[J]. 工程力学,2013,30(3):181-190. [2] 方有珍,陆承铎,马吉,等. 新型卷边钢板组合截面 PEC柱(弱轴)滞回性能足尺试验研究[J]. 土木工程学报,2013,46(1):24-33. [3] 赵根田,张宇鸣,曹芙波,等. 焊接H形钢部分包裹高强混凝土柱抗震性能试验研究[J]. 建筑结构学报,2019,40(4):116-122. [4] 李补拴,张宇鸣,赵根田,等. 不同加载方式下的PEC柱(强轴)抗震性能试验研究[J]. 建筑钢结构进展,2021,23(8):43-52. [5] BEGUM M,DRIVER G R,ELWI E A. Parametric study on eccentrically-loaded partially encased composite columns under major axis bending[J]. Steel and Composite Structures,2015,19(5):1299-1319. [6] BADRINARAYAN R,SHIFERAW G,ROBE K,et al. Effect of different width ratio and transversal link pattern on the load carrying capacity of partially encased composite column[J]. Asian Journal of Civil Engineering,2022,24(1):205-218. [7] 林德慧,陈以一,李杰. 部分包覆钢-混凝土组合柱单向压弯面内整体稳定承载力的工程计算[J]. 建筑结构,2021,51(7):14-21. [8] 张文轩,石韵,苏明周,等. 窄翼缘PEC中长柱轴压整体稳定性能试验研究[J]. 建筑钢结构进展,2023,25(6):1-12. [9] 孙锐,陈以一,杨宇焜,等. PEC剪力墙抗侧性能试验研究[J]. 钢结构(中英文),2023,38(6):1-11. [10] 朱杰,朱浩川,肖志斌,等. 部分包覆钢-混凝土组合墙轴压稳定性能研究[J]. 钢结构(中英文),2023,38(6):12-21. [11] 中华人民共和国住房和城乡建设部. 混凝土异形柱结构技术规程:JGJ 149—2017[S]. 北京:中国建筑工业出版社,2017. [12] 李艳艳,张玮天. 十字形截面钢一混凝土组合异形柱的抗震性能[J]. 土木建筑与环境工程,2017,39(6):54-60. [13] 殷飞,薛素铎,曹万林,等. 多腔钢管混凝土异形柱不同方向抗震性能试验研究[J]. 建筑结构学报,2019,40(11):150-161. [14] 李补拴,周伟,赵根田,等. 部分包覆钢-混凝土十字形和T形截面组合柱抗震性能及轴压比限值分析[J]. 建筑结构学报,2023,44(8):99-109. [15] 宋世明. 正交双H形钢PEC构件压弯滞回性能研究[D]. 上海:同济大学,2018. [16] 中国工程建设标准化协会. 部分包覆钢-混凝土组合结构技术规程T/ CECS 719—2020[S]. 北京:中国建筑工业出版社,2020. [17] European Committee for Standardization. Eurocode 4:design of composite steel and concrete structures:EN 1994-1-1[S]. Brussels:European Committee for Standardization,2004. [18] 李炜,陈以一. 不同系杆形式的部分组合钢-混凝土受弯构件试验研究[J]. 建筑钢结构进展,2015,17(3):1-6. [19] 李炜,陈以一. H形钢翼缘间填充混凝土的部分组合梁抗震性能试验研究[J]. 建筑结构学报,2015,36(增刊l):330-336. [20] 中华人民共和国住房和城乡建设部. 组合结构设计规范:JGJ 138—2016[S]. 北京:中国建筑工业出版社,2016. [21] 中华人民共和国住房和城乡建设部. 混凝土结构设计标准:GB/T 50010—2010[S]. 北京:中国建筑工业出版社,2024. -
点击查看大图
计量
- 文章访问数: 29
- HTML全文浏览量: 8
- PDF下载量: 2
- 被引次数: 0
登录
注册
E-alert
登录
注册
E-alert
下载: