受冲击后钢管混凝土柱轴压力学性能试验研究
Experimental study on axial compression mechanical properties of concrete-filled steel tube column after impact
付朝江 1张庭 1陈华艳 1高颖 1罗才松 1王碧珍 2张泽群3
作者信息
- 1. 福建理工大学土木工程学院,福州 350118
- 2. 福建省中霖工程建设有限公司,南平 353500
- 3. 侨智建设有限公司,南平 353100
- 折叠
摘要
设计并制作了 7 根钢管混凝土柱,并对落锤冲击试验后的钢管混凝土柱进行了轴压试验,研究了轴压比、钢管壁厚和冲击能量对受冲击钢管混凝土柱轴压力学性能的影响,提出了冲击后钢管混凝土柱的承载力计算公式.结果表明:当轴压比从 0 增大到 0.2 时,钢管混凝土的承载力和位移延性系数随轴压比增大而增大,分别增加了20.05%、15.66%;当轴压比从 0.2 增大到 0.4 时,钢管混凝土柱的承载力和位移延性系数开始下降,分别降低了3.56%、5.21%,初始刚度系数随着轴压比的增大而增大;钢管厚度能改善钢管混凝土柱的力学性能,钢管壁厚为7mm的钢管混凝土柱承载力、位移延性系数、初始刚度系数比 5mm的钢管混凝土柱分别提高了 35.46%、22.89%、7.84%;随冲击能量的增大,钢管混凝土柱轴压力学性能下降.
Abstract
Seven concrete-filled steel tube columns were designed and manufactured,and the axial compression test of concrete-filled steel tube columns after drop hammer impact test was carried out.The effects of axial compression ratio,thickness of the steel tube and impact energy on the axial compression mechanical properties of concrete-filled steel tube columns under impact were studied.The calculation formula of bearing capacity of concrete-filled steel tube columns after impact was proposed.The results show that when the axial compression ratio increases from 0 to 0.2,the bearing capacity and displacement ductility coefficient of concrete-filled steel tube column increase with the increase of axial compression ratio,which increases by 20.05%and 15.66%respectively.When the axial compression ratio increases from 0.2 to 0.4,the bearing capacity and displacement ductility coefficient of concrete-filled steel tube columns begin to decrease,which are reduced by 3.56%and 5.21%respectively.The initial stiffness coefficient increases with the increase of axial compression ratio.The thickness of the steel tube can improve the mechanical properties of the concrete-filled steel tube column.The bearing capacity,displacement ductility coefficient and initial stiffness coefficient of the concrete-filled steel tube column with a thickness of 7mm are 35.46%,22.89%and 7.84%higher than those of the concrete-filled steel tube column with a thickness of 5mm,respectively.With the increase of impact energy,the axial compression mechanical properties of concrete-filled steel tube columns decrease.
关键词
钢管混凝土柱/钢管壁厚/冲击能量/轴压比/力学性能Key words
concrete-filled steel tube column/thickness of the steel tube/impact energy/axial compression ratio/mechanical property引用本文复制引用
基金项目
福建省自然科学基金项目(2022J01928)
福建省住房和城乡建设厅科学技术计划项目(2022-K-71)
福建省住房和城乡建设厅科学技术计划项目(2022-K-305)
出版年
2024
NETL
NSTL
万方数据