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5. 火灾后加劲型方钢管混凝土柱轴压力学性能研究

火灾后加劲型方钢管混凝土柱轴压力学性能研究

来源 :沈阳建筑大学学报:自然科学版 | 被引量 : 0次 | 上传用户：wangying428

【摘 要】

：

目的对火灾后加劲型钢管混凝土柱轴压性能及受力全过程工作机理进行研究。方法通过借助相关文献中的试验进行有限元模型验证后,利用有限元软件ABAQUS对试件变形形态进行分析,研究受火时间、加劲肋厚度以及钢材屈服强度对试件承载力的影响。结果常温下普通钢管混凝土柱以及火灾前后加劲型钢管混凝土柱在轴向荷载作用下均表现为中部鼓曲,且加劲肋出现局部屈曲;受力全过程中试件混凝土荷载分担比经历了先增大后减小的过程,荷载分担比最大为40.11%;通过参数分析发现,当采用ISO-834标准升温曲线对试件进行升温处理后,试件承载力

【作 者】

：

李学锋 王慧峰 刘振辉 

【机 构】

：

沈阳建筑大学管理学院,辽宁省建设科学研究院有限责任公司

【出 处】

：

沈阳建筑大学学报:自然科学版

【发表日期】

：

2021年4期

【关键词】

：

火灾 加劲型钢管混凝土柱 轴压性能 有限元 

【基金项目】

：

国家自然科学基金项目(52078310)。

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论文部分内容阅读

目的对火灾后加劲型钢管混凝土柱轴压性能及受力全过程工作机理进行研究。方法通过借助相关文献中的试验进行有限元模型验证后,利用有限元软件ABAQUS对试件变形形态进行分析,研究受火时间、加劲肋厚度以及钢材屈服强度对试件承载力的影响。结果常温下普通钢管混凝土柱以及火灾前后加劲型钢管混凝土柱在轴向荷载作用下均表现为中部鼓曲,且加劲肋出现局部屈曲;受力全过程中试件混凝土荷载分担比经历了先增大后减小的过程,荷载分担比最大为40.11%;通过参数分析发现,当采用ISO-834标准升温曲线对试件进行升温处理后,试件承载力

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