FIRE RESPONSES AND RESISTANCE OF CONCRETE-FILLED STEEL TUBULAR FRAME STRUCTURES
FIRE RESPONSES AND RESISTANCE OF CONCRETE-FILLED STEEL TUBULAR FRAME STRUCTURES
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DOI：
10.1142/s0219455410003452
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发表时间：
2010-06
影响因子：
3.6
通讯作者：
中科院分区：
文献类型：
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本文采用非线性有限元方法，对火灾下钢管混凝土框架结构的动力响应和耐火极限进行了研究。在倒塌分析中考虑了强度和稳定性准则。框架结构采用圆钢管混凝土柱和工字形钢梁。为了验证有限元解的正确性，将数值计算结果与钢管混凝土柱抗火试验结果进行了比较。然后采用有限元模型模拟火灾下框架结构的行为。在ISO-834标准火灾下，得到了框架的结构响应，包括临界温度和耐火极限时间。参数进行了研究，以显示其对框架结构在火灾下的承载能力的影响。对今后类似结构的施工和设计提出了建议。
This paper presents the results of dynamic responses and fire resistance of concrete-filled steel tubular (CFST) frame structures in fire conditions by using the nonlinear finite element method. Both strength and stability criteria are considered in the collapse analysis. The frame structures are constructed with circular CFST columns and steel beams of I-sections. In order to validate the finite element solutions, the numerical results are compared with those from a fire resistance test on CFST columns. The finite element model is then adopted to simulate the behavior of frame structures in fire. The structural responses of the frames, including the critical temperature and fire-resisting limit time, are obtained for the ISO-834 standard fire. Parametric studies are carried out to show their influence on the load capacity of the frame structures in fire. Suggestions and recommendations are presented for possible adoption in future construction and design of similar structures.