摘要
对10个高宽比为3的角钢约束混凝土短柱进行轴心受压试验,观察试件的破坏过程,得到了试件的荷载-轴向位移关系曲线,根据试验结果,分析了构件截面尺寸、缀板间距以及混凝土强度对角钢约束混凝土柱承载力的影响;利用有限元软件ANSYS对试验过程进行数值仿真分析。结果表明:试件最终破坏时在试件中部附近位置角钢和缀板出现凸鼓变形;随着缀板间距的增大,试件的承载力逐渐减小,荷载-位移曲线下降越明显,可见在相同条件下,缀板间距是影响角钢约束混凝土短柱承载力的主要因素。在试验和仿真分析的基础上提出角钢约束混凝土轴压短柱承载力的简化计算式。
Experimental research on 10 angle reinforced concrete（ARC） stub columns with a height to width ratio of 3.0 subjected to axial compressive load was carried out.The failure process of the specimen was observed and the load-axial displacement curves of the specimens were obtained.According to the experimental results,the influences of section size of specimens,battens spacing and concrete strength on the bearing capacity of the ARC stub columns were analyzed.The experimental process was simulated by finite element software ANSYS.The results show that the convex bulging deformation occurs in angle and batten of specimens near the middle position of columns when the specimens fail.With the increase of the distance between the battens,the bearing capacity of specimens becomes smaller and the load-displacement curve decreases more obviously.So battens spacing is the important factor influencing the bearing capacity of the ARC stub columns under the same condition.Based on the experimental data and simulation analysis,a simple calculation formula for the bearing capacity of the ARC stub columns under axial compression is proposed.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2012年第4期121-127,共7页
Journal of Building Structures
基金
国家自然科学基金面上项目(51178087)
黑龙江省教育厅科学技术研究项目(12511022)
黑龙江省自然科学基金项目(E200811)
关键词
角钢约束混凝土短柱
轴压试验
有限元分析
承载力
angle reinforced concrete stub column
axial compression test
finite element analysis
bearing capacity
