摘要
钢结构住宅建筑对结构件尺寸和保温防火性能均有较高要求。针对适用于钢结构住宅的钢管混凝土柱-横肋波纹钢板异形剪力墙提出了外包ALC防火板内嵌岩棉的防火构造。建立了三组典型波纹板剪力墙模型并采用顺序耦合的方式实现热力耦合分析,研究该剪力墙构件用于住宅建筑时的防火性能。经历180min单面ISO-834标准火灾作用后,剪力墙均具有较好的隔热性能和过火完整。单面受火下波纹钢板区域整体呈现出朝向背火侧凸起趋势,其中钢管混凝土柱基本保持竖直状态,波纹板和钢管混凝土应力范围并未超过其高温下材料屈服强度限值。三组剪力墙构件在单面和双面标准火灾升温下其整体隔热性、整体变形、轴向压缩变形值均满足承重墙构件180min的一级耐火极限要求,且过火后构件承载力可基本恢复,仅需修复防火层即可重复使用。
Steel structure residential buildings have high requirements on the size of structural parts and the performance of thermal insulation and fire protection.Aiming at the concrete filled steel tubular column-cross-rib corrugated steel plate special-shaped shear wall suitable for steel structure residence,the fire-proof structure of outsourcing ALC fire-proof board embedded with rock wool is proposed.Three groups of typical corrugated plate shear wall models are established and the thermal-mechanical coupling analysis is realized by sequential coupling to study the fire resistance performance of the shear wall components used in residential buildings.After 180 min single-sided ISO-834 standard fire action,the shear walls have good thermal insulation performance and complete fire.The corrugated steel plate area under single-sided fire shows a tendency to bulge towards the back fire side,in which the concrete-filled steel tube column basically maintains a vertical state,and the stress range of the corrugated plate and the concrete-filled steel tube does not exceed the yield strength limit of the material at high temperature.The overall thermal insulation,overall deformation and axial compression deformation values of the three groups of shear wall members under single-sided and double-sided standard fire heating meet the first-level fire resistance limit requirements of the load-bearing wall members for 180 min,and the bearing capacity of the members can be basically restored after the fire,and only the fire protection layer can be repaired and reused.
作者
唐伟军
余玉洁
Tang Weijun;Yu Yujie(Hunan Construction Engineering Group Design&Research Institute Co.,Ltd,Changsha 410004,China;School of Civil Engineering,Central South University,Changsha 410075,China)
出处
《建筑科学》
北大核心
2025年第7期116-125,共10页
Building Science
基金
国家自然科学基金(52278231)
湖南省科技创新计划资助(2023RC3038)
湖南建工集团工程设计研究院有限公司一般课题(HCDI-2024004)。
关键词
钢结构住宅
异形剪力墙
数值模拟
耐火性能
热力耦合
steel residential building
special-shaped shear wall
numerical simulation
fire-proof performance
thermal-mechanical analysis
