高温喷水冷却后方钢管与圆钢管再生混凝土短柱轴压性能对比分析

陈宗平; 周济

doi:10.13204/j.gyjz202002023

高温喷水冷却后方钢管与圆钢管再生混凝土短柱轴压性能对比分析

doi: 10.13204/j.gyjz202002023

陈宗平^1,2,
周济¹

1. 广西大学土木建筑工程学院, 南宁 530004;
2. 广西大学工程防灾与结构安全教育部重点实验室, 南宁 530004

基金项目:

国家自然科学基金项目（51578163）；广西自然科学基金重点项目（2016GXNSFDA380032）；八桂学者专项经费资助项目（[2019]79号）。

详细信息

作者简介:
陈宗平,男,1975年出生,博士,教授。电子信箱:zpchen@gxu.edu.cn

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出版历程
- 收稿日期: 2019-04-23

COMPARATIVE ANALYSIS OF AXIAL COMPRESSION PROPERTIES OF RECYCLED CONCRETE SHORT COLUMN FILLED CIRCULAR AND SQUARE STEEL TUBE AFTER BEING SUBJECTED TO HIGH TEMPERATURES AND WATER COOLING

CHEN Zongping^1,2,
ZHOU Ji¹

1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
2. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China

摘要

摘要: 为研究高温喷水冷却后方钢管与圆钢管再生混凝土短柱轴压性能差异，以方和圆两种截面形式、历经最高温度、再生粗骨料取代率和冷却方式为变化参数，对各27根方钢管和圆钢管再生混凝土短柱进行高温冷却后轴压加载试验，观察了试件的破坏过程，对比分析了方钢管与圆钢管试件的承载力、初始轴压刚度、延性及耗能的差异。结果表明：方钢管试件的初始轴压刚度和耗能能力受冷却方式的影响显著，圆钢管试件的承载力和延性受冷却方式的影响显著；随着温度T的不断升高，方钢管试件承载力退化、延性变化及耗能能力变化较圆钢管试件相比更为显著；对于初始轴压刚度，当温度较低时，方钢管试件退化更大，当温度较高时，圆钢管试件退化更大；取代率对方钢管试件的承载力和圆钢管试件的初始轴压刚度影响较大，且随着取代率r的增大，方钢管试件的延性系数和耗能系数增大，而圆钢管试件的延性系数和耗能系数减小。
- 钢管再生混凝土 /
- 截面形式 /
- 高温 /
- 喷水冷却 /
- 轴压性能
Abstract: In order to study the difference of axial compression properties of recycled concrete filled square(RCFSST) and circular steel tube (RCFCST) short column after being subjected to high temperatures and water cooling, 27 RCFSST and 27 RCFCST short columns were designed for axial compression test, with the variable parameters of recycled coarse aggregate replacement percentage, temperature and cooling method considered. The failure process of specimens was observed, and the mechanical properties such as bearing capacity, initial axial compression stiffness, ductility and energy dissipation capacity of the specimens were compared and analyzed. The results showed that the initial axial compression stiffness and energy dissipation capacity of RCFSST specimens were more affected by cooling method, while the bearing capacity and ductility of RCFCST specimens were more affected by cooling method. With the increase of temperature, the bearing capacity degradation, ductility change and energy consumption change of RCFSST specimens were more significant than that of RCFCST specimens. For the change of initial axial compression stiffness, when the temperature was lower, the degeneration of RCFSST specimens was greater, and when the temperature was higher, the degeneration of RCFCST specimens was greater. The change of the replacement percentage had a great influence on the bearing capacity of RCFSST specimens and initial axial compression stiffness of RCFCST.specimens With the increase of the replacement percentage, the ductility and energy dissipation coefficients of RCFSST specimens increased, while those of RCFCST specimens decreased.
- recycled concrete filled steel tube /
- cross-section shape /
- high temperature /
- water cooling /
- axial compression properties

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