基于不同混凝土本构模型的混凝土双向板火灾行为分析  

ANALYSIS OF FIRE BEHAVIOR OF TWO-WAY CONCRETE SLABS BASED ON DIFFERENT CONSTITUTIVE MODELS

作　　者：王勇[1,2] 王腾焱 袁广林 安晓莉[1] 董毓利[3] WANG Yong WANG Teng-yan YUAN Guang-lin AN Xiao-li DONG Yu-li(State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China Jiangsu Collaborative Innovation Center for Building Energy Saving and Construct Technology, Xuzhou, Jiangsu 221008, China School of Civil Engineering, Huaqiao University, Xiamen, Fujian 361000, China)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点试验室,江苏徐州221008 [2]江苏建筑节能与建造技术协同创新中心,江苏徐州221008 [3]华侨大学土木工程学院,福建厦门361000

出　　处：《工程力学》2016年第11期208-219,共12页Engineering Mechanics

基　　金：国家青年自然科学基金项目(51408594);中国博士后科学基金特别资助项目(2016T90525);中国博士后科学基金项目(2014M560461);中央高校基本科研业务费专项资金项目(2014QNA78);教育部高等学校博士学科点专项科研基金项目(20120095110027);国家自然科学基金项目(51178143);江苏高校优势学科建设工程资助项目;江苏建筑节能与建造技术协同创新中心资助项目(SJXTQ1614)

摘　　要：为考查本构模型对混凝土双向板火灾行为的影响,建立不考虑骨料类型影响的混凝土高温本构模型,编程对混凝土试验板火灾行为进行分析,验证了本构模型的有效性。在此基础上,基于EC2、ASCE和该文模型,分析本构模型、火灾工况、板厚和骨料类型等参数对混凝土双向板火灾行为的影响规律。结果表明,与EC2和ASCE模型计算结果相比,该文模型所得结果均趋于保守。To investigate the effect of constitutive models on the fire behavior of reinforced concrete slabs, this paper proposed the concrete constitutive models without considering the influence of aggregate type. The program was developed to trace the behavior of two-way reinforced concrete slab in fire. The reasonability of the proposed constitutive models was verified by comparing the predictions from the present program with data from fire tests. According to EC2, ASCE and present models, the program was applied to investigate the influence of the constitutive models, fire scenarios, thickness and aggregate type on the fire response of slabs. The results show that the proposed constitutive models tend to predict conservative results, compared with those obtained from EC2 and ASCE models.

关 键 词：钢筋混凝土板 数值分析 火灾行为 本构模型 温度 

分 类 号：TU375.2[建筑科学—结构工程]