文献类型：期刊文献

中文题名：钢骨超高强混凝土框架与柱在循环荷载下的抗震性能对比

英文题名：Comparison of Seismic Performance of Steel-Reinforced Ultra-High-Strength Concrete Frames and Columns Under Cyclic Loads

作者：马英超[1,2];侯爽[3];郑晓峰[1,2];韩龙[1,2];周忠兵[1,2]

机构：[1]广东海洋大学海洋工程与能源学院,广东湛江524088;[2]广东海洋大学,广东省南海海洋牧场智能装备重点实验室,广东湛江524088;[3]华南理工大学土木与交通学院/亚热带建筑与城市科学全国重点实验室,广东广州510640

年份：2026

卷号：54

期号：5

起止页码：116

中文期刊名：华南理工大学学报(自然科学版)

外文期刊名：Journal of South China University of Technology(Natural Science Edition)

收录：北大核心2023、、北大核心

基金：国家自然科学基金项目(51978284);海洋青年人才项目(2024R3003);广东海洋大学科研启动基金项目(060302072404)。

语种：中文

中文关键词：SRUHSC框架;SRUHSC柱;抗震性能;轴压比;循环荷载

外文关键词：SRUHSC frame;SRUHSC column;seismic performance;axial compression ratio;cyclic loading

中文摘要：针对钢骨超高强混凝土(SRUHSC)柱与框架结构,该研究开展了往复循环荷载作用下的抗震性能对比试验,重点探究轴压比对两者抗震性能的影响机制,并揭示单柱与整体框架在抗震行为上的本质差异。实验设计了3组不同轴压比下SRUHSC柱与框架的对比试验,系统分析了其破坏模式、滞回曲线、骨架曲线、刚度退化规律、能量耗散能力、延性系数等关键指标。试验结果显示,随着轴压比增大,单独SRUHSC柱主要呈现弯曲破坏特征,表现为构件端部混凝土压溃、纵向钢筋屈服;而SRUHSC框架则以弯剪-粘结破坏为主,伴随节点区钢筋与混凝土粘结滑移加剧、梁端塑性铰发展受限;对比分析发现,相较于单柱,框架结构在整体抗震性能上呈现更明显的优势。此外,轴压比的增大对两类结构的受力性能产生显著影响:不仅加速了裂缝的扩展速率和分布范围,导致初始刚度提升但后期刚度退化加快,还显著降低了结构的延性和能量耗散系数,对极限承载力也有不利影响。研究明确了轴压比在SRUHSC柱与框架抗震性能中的差异化,证实了单柱进入框架整体结构中抗震性能会下降,为SRUHSC结构的抗震设计优化及性能提升提供了重要的试验数据与理论依据。

外文摘要：To investigate the influence mechanism of axial compression ratio on the seismic performance of steelreinforced ultra-high-strength concrete(SRUHSC)columns and frames,and to reveal the fundamental differences in seismic behavior between isolated columns and integral frames,comparative cyclic loading tests were carried out.Three sets of comparative experiments were designed for SRUHSC columns and frames under different axial compression ratios.Key seismic indicators,including failure mode,hysteresis curve,skeleton curve,stiffness degradation law,energy dissipation capacity,and ductility coefficient,were systematically analyze.Experimental results indicate that with an increase in the axial compression ratio,isolated SRUHSC columns primarily exhibit flexural failure,characterized by concrete crushing at the member ends and yielding of longitudinal reinforcement.In contrast,SRUHSC frames predominantly undergo flexure-shear-bond failure,accompanied by intensified bond-slip between the reinforcement and concrete in the joint regions and restricted development of plastic hinges at the beam ends.Comparative analysis reveals that,compared to isolated columns,the frame structure demonstrates a more pronounced advantage in overall seismic performance.Furthermore,an increase in the axial compression ratio affects the mechanical performance of both structural types:it accelerates the propagation rate and distribution range of cracks,leads to higher initial stiffness but faster stiffness degradation in the later stages,and substantially reduces both the ductility and energy dissipation coefficient of the structure,while also adversely affecting the ultimate loadbearing capacity.This study clarifies the differentiated roles of the axial compression ratio in the seismic performance of SRUHSC columns and frames,confirming that the seismic performance of a single column deteriorates when integrated into a frame structure.These findings provide critical experimental data and a theoretical foundation for the seismic design optimization and performance enhancement of SRUHSC structures.