结构工程师2026，Vol.42Issue(4)：48-52,5.DOI:10.15935/j.cnki.jggcs.202604.0006
火灾高温下混凝土结构内部热传导与蒸汽压变化机制研究
Research on Variation Mechanism of Internal Thermal Conductivity and Vapor Pressure in Concrete Structures under High Temperature in a Fire
摘要
Abstract
To accurately reveal the mechanisms of concrete structure cracking and damage under fire,an analytical method for high-temperature concrete structures under fire is employed.This method investigates structural performance alongside variations in internal temperature and vapor pressure,accounting for internal heat conduction and vapor pressure dynamics within the concrete.Furthermore,the method utilizes randomly generated polygonal rigid-body elements to discretize the concrete structure.A truss element network,formed by connecting characteristic points of these rigid-body elements,simulates internal heat conduction and vapor pressure migration.Results indicate a significant risk of cracking and damage near heated surface zones due to concentrated internal temperature and vapor pressure under high temperatures.By incorporating internal heat conduction and vapor pressure effects,this approach effectively analyzes both structural performance and internal field variations during fire exposure,offering a robust framework for studying the high-temperature behavior of concrete structures under such conditions.关键词
混凝土结构/火灾高温/变化机制/热传导/蒸汽压Key words
concrete structure/high temperature in fire/variation mechanism/heat conduction/vapor pressure分类
建筑与水利引用本文复制引用
侯昌明,苏波,何旭亮,刘乃桓,罗志刚,张永兴..火灾高温下混凝土结构内部热传导与蒸汽压变化机制研究[J].结构工程师,2026,42(4):48-52,5.基金项目
广东电网有限责任公司基建技术创新专题 （）
