高温下钢筋混凝土梁-柱节点的力学性能演化机制  

Mechanical Property Evolution of Beams-Column Joints at Elevated Temperatures

作　　者：卢丽敏[1,2] 王守兴 吴少华 李康 舒前进 袁广林[1] 禹海涛[5] LU Limin;WANG Shouxing;WU Shaohua;LI Kang;SHU Qianjin;YUAN Guanglin;YU Haitao(Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Mining and Technology,Xuzhou 221116,China;Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology,Xuzhou 221116,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Xuzhou Construction Engineering Testing Center Co.,Ltd.,Xuzhou 221003,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点试验室,江苏徐州221116 [2]江苏建筑节能与建造技术协同创新中心,江苏徐州221116 [3]中国矿业大学力学与土木工程学院,江苏徐州221116 [4]徐州市建设工程检测中心有限公司,江苏徐州221003 [5]同济大学土木工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2023年第4期571-577,共7页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金青年基金(51808544)。

摘　　要：为研究钢筋混凝土框架梁-柱节点的火灾行为及其相互约束作用随温度的变化规律,开展了荷载-高温耦合作用下的钢筋混凝土框架梁升降温全过程的结构试验。在试验的基础上采用VULCAN程序进行了恒定荷载作用下框架梁单独受高温、梁-柱同时受高温,梁-柱节点弯矩-转角关系的火灾响应数值分析。结果表明,钢筋混凝土框架梁-柱节点的转动约束强度随温度的升高而降低,梁-柱节点转角峰值相较于弯矩峰值具有滞后效应。In order to study the structural behavior of reinforced concrete beam-column joints and the changing rules of the constraints between them at elevated temperatures,thermal-load coupling tests on reinforced concrete frame beams were conducted.Based on the test,the VULCAN program is adopted to conduct the numerical analysis of the fire response of the frame beam subjected to high temperature alone,the beam-column subjected to high temperature at the same time,and the beam-column joint moment-rotation relationship at a constant load.The results show that the end restraint strength of reinforced concrete frame beams decreases with the increase of temperature.The peak value of the rotational angle at the beam-column joint has a certain delay compared to the peak value of the restraint moment.

关 键 词：梁-柱节点 火灾高温 转动约束 力学性能 火灾试验 

分 类 号：TU312[建筑科学—结构工程] TU317