带约束拉杆方形钢管混凝土短柱抗震性能研究
发布时间：2019-05-03 18:38
【摘要】：针对目前对约束拉杆方形钢管混凝土短柱的研究主要集中于其静力性能方面,尚缺乏对该种截面形式构件在往复荷载作用下的抗震性能研究,为进一步完善带约束拉杆方形钢管混凝土的科学理论体系,深入了解其力学性能和抗震性能,本文采用试验研究、理论分析和数值模拟相结合的方法对带约束拉杆方形钢管混凝土短柱开展抗震性能试验研究和理论分析。主要研究内容和成果如下： (1)完成了3个不带约束拉杆和8个带约束拉杆的方形钢管混凝土短柱在低周反复荷载作用下的试验研究。考察了轴压比和约束拉杆布置间距等参数对其抗震性能的影响。试验结果表明：带约束拉杆方形钢管混凝土短柱具有良好的承载力、延性和耗能能力,且抗震性能优于不带约束拉杆试件。 (2)随着轴压比的增大,带约束拉杆方形钢管混凝土短柱的变形能力降低,但试件的耗能能力有所提高,试件承载能力随轴压比的增大呈现出先增大后减小的趋势。带约束拉杆方形钢管混凝土短柱在轴压比较大时,抗震性能有显著优势。 (3)减小约束拉杆布置间距,可显著提高试件的承载能力和极限变形能力,承载力退化和刚度退化明显变缓,试件的抗震性能和延性性能明显改善。仅减小试件约束拉杆的纵向间距或横向间距也能够有效地改善试件抗震性能。约束拉杆纵向间距的减小,能够显著提高试件承载能力和耗能能力；而随着约束拉杆横向间距的减小,试件的极限变形能力呈增大趋势。 (4)基于ABAQUS平台建立起构件数值模型,完善了材料本构模型,对带约束拉杆方形钢管混凝土短柱的荷载-变形关系曲线进行了计算,数值模拟计算结果与试验结果吻合较好,并在此基础上针对构件进行了系统的参数分析,深入分析和研究了带约束拉杆方形钢管混凝土柱的受力工作机理。 (5)基于试验获取的骨架曲线和滞回曲线结果,采用试验拟合法,建立了带约束拉杆方形钢管混凝土柱骨架曲线简化三折线模型,给出了骨架曲线各个关键点的计算公式,并对循环反复加卸载下的恢复力模型滞回规律作出了总结。
[Abstract]:At present, the research on confined concrete-filled square steel tube short columns mainly focuses on its static performance, but there is still lack of research on the seismic behavior of this kind of cross-section members under reciprocating loads. In order to further improve the scientific and theoretical system of concrete filled square steel tube with confined tension bars and understand its mechanical and seismic properties, this paper adopts the experimental study, The experimental study and theoretical analysis of seismic behavior of concrete-filled square steel tube short columns with confined tension bars are carried out by combining theoretical analysis with numerical simulation. The main research contents and achievements are as follows: (1) three concrete filled square concrete filled steel tubular short columns without restraint and eight short columns with tie bars under low cyclic loading have been tested. The influence of the axial compression ratio and the spacing of the constrained tension rod on its seismic performance is investigated. The experimental results show that the concrete-filled square steel tube short columns with confined tension bars have good bearing capacity, ductility and energy dissipation capacity, and the seismic performance is better than that of the specimens without restraint. (2) with the increase of axial compression ratio, the deformation capacity of concrete-filled square steel tube short column with confined tension rod decreases, but the energy dissipation capacity of the specimen increases, and the bearing capacity of the specimen increases first and then decreases with the increase of axial compression ratio. The seismic performance of concrete-filled square steel tube short columns with confined tension bars is superior to that of concrete-filled steel tubular columns under large axial compression. (3) the bearing capacity and ultimate deformation capacity of the specimen can be significantly improved by decreasing the spacing between the tie bars, the degradation of bearing capacity and the degradation of stiffness become slower, and the seismic performance and ductility performance of the specimen are obviously improved. The seismic performance of the specimen can also be improved by only decreasing the longitudinal or transverse spacing of the confined tensile rod. The load-bearing capacity and energy dissipation capacity of the specimen can be significantly improved with the decrease of the longitudinal spacing of the restrained tension rod, while the ultimate deformation capacity of the specimen increases with the decrease of the transverse spacing of the restrained tension rod. (4) based on the ABAQUS platform, the numerical model of the member is established, and the material constitutive model is perfected. The load-deformation relation curve of the concrete-filled square concrete filled steel tube short column with confined tension bar is calculated. The numerical simulation results are in good agreement with the experimental results, and the results of numerical simulation are in good agreement with the experimental results. On this basis, a systematic parameter analysis is carried out for the members, and the working mechanism of the concrete-filled square steel tube columns with confined tension bars is deeply analyzed and studied. (5) based on the experimental results of skeleton curve and hysteretic curve, the simplified three-fold curve model of square concrete filled steel tube column with restrained tension bar is established by the method of test fitting, and the calculation formulas of each key point of skeleton curve are given. The hysteretic law of restoring force model under cyclic loading and unloading is summarized.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
本文编号：2469165
[Abstract]:At present, the research on confined concrete-filled square steel tube short columns mainly focuses on its static performance, but there is still lack of research on the seismic behavior of this kind of cross-section members under reciprocating loads. In order to further improve the scientific and theoretical system of concrete filled square steel tube with confined tension bars and understand its mechanical and seismic properties, this paper adopts the experimental study, The experimental study and theoretical analysis of seismic behavior of concrete-filled square steel tube short columns with confined tension bars are carried out by combining theoretical analysis with numerical simulation. The main research contents and achievements are as follows: (1) three concrete filled square concrete filled steel tubular short columns without restraint and eight short columns with tie bars under low cyclic loading have been tested. The influence of the axial compression ratio and the spacing of the constrained tension rod on its seismic performance is investigated. The experimental results show that the concrete-filled square steel tube short columns with confined tension bars have good bearing capacity, ductility and energy dissipation capacity, and the seismic performance is better than that of the specimens without restraint. (2) with the increase of axial compression ratio, the deformation capacity of concrete-filled square steel tube short column with confined tension rod decreases, but the energy dissipation capacity of the specimen increases, and the bearing capacity of the specimen increases first and then decreases with the increase of axial compression ratio. The seismic performance of concrete-filled square steel tube short columns with confined tension bars is superior to that of concrete-filled steel tubular columns under large axial compression. (3) the bearing capacity and ultimate deformation capacity of the specimen can be significantly improved by decreasing the spacing between the tie bars, the degradation of bearing capacity and the degradation of stiffness become slower, and the seismic performance and ductility performance of the specimen are obviously improved. The seismic performance of the specimen can also be improved by only decreasing the longitudinal or transverse spacing of the confined tensile rod. The load-bearing capacity and energy dissipation capacity of the specimen can be significantly improved with the decrease of the longitudinal spacing of the restrained tension rod, while the ultimate deformation capacity of the specimen increases with the decrease of the transverse spacing of the restrained tension rod. (4) based on the ABAQUS platform, the numerical model of the member is established, and the material constitutive model is perfected. The load-deformation relation curve of the concrete-filled square concrete filled steel tube short column with confined tension bar is calculated. The numerical simulation results are in good agreement with the experimental results, and the results of numerical simulation are in good agreement with the experimental results. On this basis, a systematic parameter analysis is carried out for the members, and the working mechanism of the concrete-filled square steel tube columns with confined tension bars is deeply analyzed and studied. (5) based on the experimental results of skeleton curve and hysteretic curve, the simplified three-fold curve model of square concrete filled steel tube column with restrained tension bar is established by the method of test fitting, and the calculation formulas of each key point of skeleton curve are given. The hysteretic law of restoring force model under cyclic loading and unloading is summarized.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
【参考文献】
相关期刊论文 前10条
1 陈洪涛,钟善桐,张素梅;钢管混凝土中混凝土的三向本构关系[J];哈尔滨建筑大学学报;2000年06期
2 徐超;张耀春;卢孝哲;;方形设肋薄壁钢管混凝土柱的恢复力模型[J];哈尔滨工业大学学报;2008年04期
3 龙跃凌;蔡健;;带约束拉杆矩形钢管混凝土短柱轴压承载力计算的简化方法[J];混凝土;2010年03期
4 龙跃凌;蔡健;;带约束拉杆L形钢管混凝土短柱轴压性能的试验研究[J];华南理工大学学报(自然科学版);2006年11期
5 何振强;蔡健;陈星;;带约束拉杆方钢管混凝土短柱轴压性能试验研究[J];建筑结构;2006年08期
6 吕西林,陆伟东;反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J];建筑结构学报;2000年02期
7 陈宗弼,陈星,叶群英,罗赤宇;广州新中国大厦结构设计[J];建筑结构学报;2000年03期
8 张素梅,刘界鹏,王玉银,郭兰慧;双向压弯方钢管高强混凝土构件滞回性能试验与分析[J];建筑结构学报;2005年03期
9 蔡健;龙跃凌;;带约束拉杆方形、矩形钢管混凝土短柱的轴压承载力[J];建筑结构学报;2009年01期
10 蔡健;左志亮;赵小芹;朱昌宏;;带约束拉杆L形钢管混凝土短柱偏压试验研究[J];建筑结构学报;2011年02期
相关博士学位论文 前1条
1 杜喜凯;往复荷载作用下钢管混凝土柱性能试验及理论分析[D];天津大学;2010年
，本文编号：2469165
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2469165.html
