摘要
火灾后钢管混凝土的轴压刚度和抗弯刚度是钢管混凝土结构变形性能和抗震分析的重要指标 ,也是火灾后钢管混凝土修复和加固的重要依据之一。本文利用数值方法计算了标准火灾作用后钢管混凝土轴压构件和纯弯构件荷载 -变形关系曲线 ,分析了受火时间、材料强度、含钢率、截面尺寸等因素的影响规律 ,最后推导了标准火灾作用后钢管混凝土轴压刚度和抗弯刚度的简化计算公式 ,所得结果可供有关钢管混凝土结构工程设计时参考。
Axial stiffness and flexural stiffness of concrete-filled steel tubes after exposure to fire are very important parameters for the seismic analysis of this kind of structures after fire. A kind of numerical method is used to calculate the load versus deformation curves of axially-loaded and pure flexural members of concrete filled steel tube after exposure to ISO-834 standard fire. Influence of fire duration time, material strength, steel ratio and sectional dimensions on the stiffness is analyzed. Simplified formula for calculating the axial and flexural stiffness of concrete filled steel tube after fire is given based on the parametric analysis, which may be a reference for concrete filled steel tubular structures used in practical engineering.
出处
《地震工程与工程振动》
CSCD
北大核心
2002年第5期143-151,共9页
Earthquake Engineering and Engineering Dynamics
基金
福建省自然科学基金重点项目 (E0 12 0 0 0 1)
