摘要
该文通过对6根不同强度的高强钢管和高强混凝土抛物线型拱肋试件进行了对称分级加载,探明了拱肋在均布荷载下的受力行为,研究了高强钢管混凝土拱的承载能力,并与有限元计算结果进行了比较,二者基本吻合。基于有限元模型参数分析,阐明了钢管和混凝土强度、矢跨比、长细比和含钢率对拱的平面内承载力的影响。结果表明:全跨竖向均布荷载下拱肋的极限承载力随着钢管和混凝土的强度、矢跨比、含钢率的增加而增加,而极限承载力随长细比的增大而减少;当钢管强度等级从Q460提升至Q690时,拱肋承载力提高19.4%~21.4%;矢跨比、长细比和含钢率为影响拱肋平面承载力的主要因素。
The symmetrical step loading was carried out on six high-strength concrete filled steel tabular(HS-CFST)parabolic arch specimens.The mechanical behavior of the arch rib under a uniform load was investigated,and the ultimate bearing capacity of HS-CFST were also obtained.The experimental results are compared with the FE results,showing a good agreement.Based on the parameter analysis of finite element model of the arch,the effects of the steel tube strength,of concrete strength,of rise-span ratio,of slenderness ratio and,of steel content on the in-plane bearing capacity were analyzed.The results show that the ultimate bearing capacity of the arch rib increases with the increase of the strength of the steel tube and concrete,and of rise-span ratio and steel content,but decreases with the increase of slenderness ratio.When the strength grade of the steel tube increases from Q460 to Q690,the bearing capacity of arch rib increases by 19.4%~21.4%.It is also found the rise-span ratio,slenderness ratio and steel content are the main factors affecting the in-plane bearing capacity of arch ribs.
作者
李学松
张怡孝
高仲康
黄永辉
刘爱荣
LI Xue-song;ZHANG Yi-xiao;GAO Zhong-kang;HUANG Yong-hui;LIU Ai-rong(Engineering Construction Center of Dongguan Binhai Bay New Area,Dongguan 523808,China;Research Center of Wind Engineering and Engineering Vibration,Guangzhou 51006,China)
出处
《工程力学》
EI
CSCD
北大核心
2022年第S01期115-120,共6页
Engineering Mechanics
基金
国家自然科学基金项目(51878188)
高等学校学科创新引智计划(111计划D21021)
广州市科技计划项目(20212200004)
中国工程院战略咨询重点项目(2021-XZ-37)。
关键词
高强钢管
高强混凝土
平面内承载能力
数值模拟
参数分析
high strength steel tube
high strength concrete
in-plane bearing capacity
numerical simulation
parameter analysis
