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火灾后钢管RPC柱抗爆动力简化计算 预览

Simplified calculation for anti-explosion dynamic response of RPC-filled steel tube column after exposure to fire
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摘要 建立了火灾后钢管活性粉末混凝土(简称钢管RPC)柱残余力学性能简化计算方法,并在公式中考虑了温度效应对钢管RPC套箍约束作用的影响;采用等效单自由度法对不同高温后柱的动力响应进行了弹塑性动力分析,探讨了恒定轴向力条件下比例距离和受火时间对柱抗爆动力响应的影响。结果表明,采用简化方法得到的计算结果能反映火灾后钢管RPC柱抗爆动力响应的基本规律。 A simplified calculation method of residual mechanical properties for reactive powder concrete filled steel tube column(hereinafter referred to as RPC-filled steel tubular column)after exposure to fire is presented by taking temperature effect and confinement effect into account,and the elasto-plastic behaviors of RPC-FST column post fire under blast loading are analyzed by employed equivalent SDOF method.The influences of scaled distance of explosive charge and fire duration on the dynamic behaviors of RPC-FST column in condition of undergoing constant axial load are further described.Results indicate that the main behaviors of RPC-FST column post fire under blast loading are well expressed by the SDOF method.
作者 邹慧辉 陈万祥 郭志昆 张岩岩 ZOU Huihui;CHEN Wanxiang;GUO Zhikun;ZHANG Yanyan(State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,PLA Army Engineering University,Nanjing 210007,China)
出处 《混凝土》 北大核心 2018年第8期54-58,70共6页 Concrete
基金 国家自然科学基金项目(51378498,51578541) 江苏省自然科学基金项目(BK20141066)
关键词 火灾后 钢管RPC柱 单自由度 抗爆动力计算 动态响应 after exposure to fire reactive powder concrete-filled steel tube column SDOF explosion-resistant calculation dynamic response
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