火灾环境下钢结构响应行为的FDS-ABAQUS热力耦合方法研究

发布时间：2018-06-18 08:31

  本文选题：钢结构 + 火灾　； 参考：《工程力学》2017年02期

【摘要】：火灾环境下钢结构热力耦合分析普遍采用ISO834标准升温曲线(或火灾升温经验公式)描述结构的升温过程,然而这种方法并不能准确描述真实火灾环境下结构的升温过程。为了分析钢结构在真实火灾温度场下的热响应行为,该文以整体结构作为研究对象,提出了基于FDS和ABAQUS的火-热-结构耦合分析方法。该方法通过创建FDS-ABAQUS耦合接口,将FDS模拟得到的火灾动态温度场数据传输到有限元软件ABAQUS中,使用ABAQUS对整体结构进行热力耦合计算,得到整体结构在特定火灾场景下的力学响应特性。案例分析表明,该文创建的耦合方法可将FDS模拟得到的温度场数据传输到ABAQUS模型,分析结果显示传输温度场数据最大误差为2.18%;模拟整体结构热响应行为时考虑不均匀热膨胀引起的内力,模拟结果更接近真实火灾场景下的力学响应。
[Abstract]:ISO834 standard heating curve (or empirical formula of fire heating) is widely used to describe the heating process of steel structure in fire environment. However, this method can not accurately describe the heating process of structure in real fire environment. In order to analyze the thermal response behavior of steel structures under the real fire temperature field, a fire thermal-structure coupling analysis method based on FDS and Abaqus is proposed in this paper. By creating the FDS-Abaqus coupling interface, the FDS simulation data of the fire dynamic temperature field is transferred to the finite element software Abaqus, and the thermo-mechanical coupling calculation of the whole structure is carried out by Abaqus. The mechanical response of the whole structure in a specific fire scene is obtained. The case study shows that the coupling method proposed in this paper can transfer the temperature field data from FDS simulation to Abaqus model. The results show that the maximum error of transmitting temperature field data is 2.18, and the internal force caused by inhomogeneous thermal expansion is taken into account in simulating the thermal response behavior of the whole structure, and the simulation results are closer to the mechanical response of the real fire scene.
【作者单位】： 上海海事大学海洋科学与工程学院;
【基金】：国家自然科学基金项目(51109127,50909058) 上海市自然科学基金项目(16ZR1414600) 上海海事大学学术创新团队基金项目(A2-0201150404) 上海市研究生教育创新计划实施项目学位点建设培育项目(20131129)
【分类号】：TU391
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本文编号：2034844