项目名称: 火灾作用下钢筋混凝土梁托柱转换结构的承载性能
项目编号: No.51278289
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 建筑科学
项目作者: 傅传国
作者单位: 山东建筑大学
项目金额: 88万元
中文摘要: 本项目针对常用的梁托柱转换结构体系,进行火灾作用下的承载性能试验研究。一是利用大型火灾试验系统,考虑转换结构布置、受火工况、荷载比、配筋构造等参数的影响,进行梁托柱转换结构模型在竖向荷载与标准升温耦合作用下的耐火性能试验,研究温度场分布规律、整体温度变形性态、构件及节点的力学行为以及热力耦合作用下各构件间相互作用机制和破坏模式等,探讨各参数变化对转换结构模型耐火行为的影响机理。二是同样考虑上述参数的影响,对梁托柱转换结构模型进行不同升温时间和冷却方式(自然和泼水冷却)工况下的剩余承载能力试验,研究受火灾作用后的转换结构承载性能劣化机理,分析各参数对承载性能劣化程度的影响规律。三是基于试验结果的分析和大型有限元软件,对试验模型进行火灾响应全过程数值模拟,探讨梁托柱转换结构在热力耦合作用下的简化实用分析方法;分析现行设计方法的抗火能力,提出火灾作用后梁托柱转换结构剩余承载能力的评估方法。
中文关键词: 钢筋混凝土结构;转换结构;抗火性能;试验研究;
英文摘要: The project aims at the experimental study on the load bearing behaviour of reinforced concrete beam supporting column transfer structure.Firstly,by the fire simulation test system,considering the influence of transfer structure arrangement、fire conditions、load ratio and reinforcement details,the specimens of reinforced concrete beam supporting column transfer structure will be tested under the couple of fire and loads,and the temperature pattern、the deformation、the mechanical behaviour of members and joints、the interaction of the members and mechanism of failure will be studied. Secondely,considering the influence of transfer structure arrangement、fire conditions、load ratio and reinforcement details,the specimens of reinforced concrete beam supporting column transfer structure will be tested after fire,the different temperature rise times and different cooling types being taken into account,the residue mechanical behaviour and load bearing capacity of specimens after fire will be analysed. Thirdly,based on the test results and finite element analysis software,the fire response whole process analysis will be carried out,and the practical smiplify analysis mathod on reinforced concrete beam supporting column transfer structure in fire will be proposed;moreover,analysing the fire resistance effectiveness of the re
英文关键词: reinforced concrete structure;transfer structure;fire resistance behaviour;experimental research;