内置型钢的圆形不锈钢管混凝土构件的抗弯性能
Flexural Behavior of Circular Steel Reinforced Concrete-Filled Stainless Steel Tubular Members
王志滨 1张铋晗 1林万福 2柯丞樑1
作者信息
- 1. 福州大学 土木工程学院,福州 350108
- 2. 福州大学 土木工程学院,福州 350108;福建路港(集团)有限公司,福建 泉州 444100
- 折叠
摘要
采用有限元模型研究内置型钢的圆形不锈钢管混凝土构件的纯弯力学性能,有限元计算结果与试验结果吻合良好.该类典型构件的抗弯承载力比不锈钢管混凝土对比构件的相应值高111.33%;混凝土承担的弯矩也比对比构件的相应值高23.31%,受压区混凝土的抗压承载力约提高了20%,原因是钢管和型钢翼缘对受压区混凝土形成了良好的约束作用.该类构件的抗弯刚度与抗弯承载力随着混凝土强度、不锈钢含钢率、型钢含钢率和回转半径比的增大而提高;其抗弯承载力随着不锈钢屈服强度或型钢屈服强度的增大而提高.最终给出了该类构件的抗弯刚度和抗弯承载力的简化计算方法.
Abstract
In this paper,a finite element(FE)model was used to study the pure bending behaviors of the circular steel reinforced concrete-filled stainless steel tubular(SRCFSST)members.The FE calculation results were in a good agreement with the test results.The flexural resistance of the typical circular SRCFSST member was 111.33%higher than that of the concrete-filled stainless steel tubular(CFSST)counterpart.The bending moment taken by the concrete of the typical circular SRCFSST member was also 23.31%higher than that of the CFSST counterpart.Owing to the increasing confinement on the concrete in the compression zone formed by the steel tube and the flange of the profiled steel,the concrete strength in the compression zone was increased by about 20%.The flexural stiffness and resistance of the circular SRCFSST specimen increased with the concrete strength,stainless steel ratio,profiled steel ratio,and gyration radius ratio.The flexural resistance of the circular SRCFSST specimen increased with the yield strength of the stainless steel or the profiled steel.Simplified models for predicting the flexural stiffness and flexural resistance of the circular SRCFSST member were finally proposed.
关键词
内置型钢的圆形不锈钢管混凝土/有限元模型/抗弯承载力/抗弯刚度/简化模型Key words
steel reinforced concrete-filled stainless steel tube/finite element model/flexural capacity/flexural stiffness/simplified model引用本文复制引用
基金项目
国家自然科学基金(52178122)
福建省自然科学基金(2021J01603)
泉州市科技计划项目(2021C015R)
出版年
2024
国家科技期刊平台
NSTL
万方数据