节能砌块隐形密框复合墙体耐火性能仿真研究  

Simulation Study on Fire Resistance Performance of Energy-saving Block and Invisible Multi-ribbed Frame Composite Wall

作　　者：朱永甫 李升才[2] 林强 Zhu Yongfu;Li Shengcai;Lin Qiang(Minnan University of Science and Technology,Fujian Engineering Research Center for Construction and Management of Green Buildings,Quanzhou Fujian 362700,China;School of Civil Engineering,Huaqiao University,Xiamen 361021,China)

机构地区：[1]闽南理工学院绿色建筑施工与管理福建省高校工程研究中心,福建泉州362700 [2]华侨大学土木工程学院,厦门361021

出　　处：《科技通报》2022年第1期55-67,72,共14页Bulletin of Science and Technology

基　　金：福建省科技计划引导性项目(2020Y0087);福建省高校工程研究中心(闽教科[2017]13号)。

摘　　要：节能砌块隐形密框复合墙体是一种新型的复合墙体,其抗震性能优于普通砖砌体墙,但对其耐火性能的研究目前较为匮乏。本文通过COMSOL仿真软件对不同高厚比(12.27和13.64)、不同轴压比(0.25和0.35)、不同偏心距(0、15 mm和30 mm)以及不同受火方式(单面和双面)下的耐火性能进行了研究,并与国家防火标准进行对比,结果表明:墙体最大位移及最大位移变化率发生在受火后20 min内,其后基本不变;当偏心距导致墙体弯曲的受压面与热应力叠加时,墙体容易破裂;高厚比和轴压比对墙体耐火性能影响不大。The energy-saving block invisible dense frame composite wall(EBIMFCW) is a new type of composite wall, its seismic performance is better than that of ordinary brick masonry wall, but the research on its fire resistance is relatively scarce. In this paper, the fire resistance performance of different height thickness ratio(12.27 and 13.64), different axial compression ratio(0.25 and 0.35), different eccentricity(0, 15 mm and 30 mm) and different fire modes(single side and double side) is studied by COMSOL simulation software, and compared with the national fire protection standard. The results show that the maximum displacement and the maximum displacement change rate of the wall occur within 20 minutes after the fire, When the eccentricity leads to the superposition of the bending compression surface and the thermal stress, the wall is easy to crack;the height thickness ratio and axial compression ratio have little effect on the fire resistance of the wall.

关 键 词：节能砌块隐形密框复合墙体 耐火性能 高厚比 轴压比 偏心距 

分 类 号：TU398.9[建筑科学—结构工程]