| 网架结构抗火性能受支座约束的影响 |
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| 引用本文： | 杜咏,李国强. 网架结构抗火性能受支座约束的影响[J]. 华侨大学学报(自然科学版), 2009, 30(4) |
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| 作者姓名： | 杜咏 李国强 |
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| 作者单位： | 南京工业大学,建筑与城市规划学院,江苏,南京,21000;同济大学,土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 国家科技部科研基金资助项目 |
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| 摘 要： | 常温下基于有限元法的网架分析设计程序较多,但均未考虑高温下钢材物理性能和力学性能的变化,以及支座约束对网架受力性能的影响.为了较真实地模拟网架在火灾中的力学行为,在ANSYS有限元分析程序的单元库、材料模型库基础上,构建符合网架结构力学模型和进行瞬态热分析的数值分析模型,并验证该数值分析模型对网架在火灾中力学反应分析的准确性,为研究网架结构在火灾中全过程反应提供切实可行的分析工具.
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| 关 键 词： | 网架结构 临界温度 弹性支座 有限元模型 |
Influence of Support Restraint on the Fire-Resistant Performance of Grid Structure |
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| DU Yong,LI Guo-qiang. Influence of Support Restraint on the Fire-Resistant Performance of Grid Structure[J]. Journal of Huaqiao University(Natural Science), 2009, 30(4) |
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| Authors: | DU Yong LI Guo-qiang |
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| Affiliation: | 1.College of Architecture and Urban Planning;Nanjing University of Technology;Nanjing 210009;China;2.State Key Laboratory of Disaster Prevention in Civil Engineering;Tongji University;Shanghai 200092;China |
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| Abstract: | A number of finite element method(FEM) software to analyze the grid structures at normal temperature don't take account of the influence of high temperature on material properties,mechanical properties and support restraint.In order to simulate more accurately the mechanical responses of grid structures in fire,a grid structural model is built from the element library and material table of FEM ANSYS software.This numerical model based on ANSYS f can carried out the mechanical analysis and the transient heat... |
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| Keywords: | grid structure critical temperature elastic support finite element method |
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