北京建筑工程学院学报
北京建築工程學院學報
북경건축공정학원학보
JOURNAL OF BEIJING INSTITUTE OF CIVIL ENGINEERING AND ARCHITECTURE
2012年
1期
1-7
,共7页
刘栋栋%张远青%李国华%杨倩
劉棟棟%張遠青%李國華%楊倩
류동동%장원청%리국화%양천
大空间网架结构%火灾作用%力学性能分析
大空間網架結構%火災作用%力學性能分析
대공간망가결구%화재작용%역학성능분석
space grid structure%fire%mechanical performance analysis
网架结构是大空间建筑的重要结构形式之一,对网架结构进行火灾下的受力性能分析是网架设计与修复加固的重要内容.现以某实际工程网架结构为研究对象,应用FDS流体模拟计算软件,分析获得网架各节点温度-时间曲线,并考虑防火涂料对钢材实际受热温度的影响,运用ABAQUS有限元结构分析软件,对网架结构在火灾过程中受力性能、位移变化及塑性应变发展状况进行分析研究,依据结构鉴定等级标准判定过火结构的损伤程度,提出修复建议.
網架結構是大空間建築的重要結構形式之一,對網架結構進行火災下的受力性能分析是網架設計與脩複加固的重要內容.現以某實際工程網架結構為研究對象,應用FDS流體模擬計算軟件,分析穫得網架各節點溫度-時間麯線,併攷慮防火塗料對鋼材實際受熱溫度的影響,運用ABAQUS有限元結構分析軟件,對網架結構在火災過程中受力性能、位移變化及塑性應變髮展狀況進行分析研究,依據結構鑒定等級標準判定過火結構的損傷程度,提齣脩複建議.
망가결구시대공간건축적중요결구형식지일,대망가결구진행화재하적수력성능분석시망가설계여수복가고적중요내용.현이모실제공정망가결구위연구대상,응용FDS류체모의계산연건,분석획득망가각절점온도-시간곡선,병고필방화도료대강재실제수열온도적영향,운용ABAQUS유한원결구분석연건,대망가결구재화재과정중수력성능、위이변화급소성응변발전상황진행분석연구,의거결구감정등급표준판정과화결구적손상정도,제출수복건의.
The space grid structure is one of the important structure forms for large-space architectures.The analysis of space grid structure's performance during fire is an important part of its design and repair reinforcement.Based on practical engineering in the article,the temperature-time curves of joints in the space grid structure by using Fire Dynamics Simulation software(FDS) are got,and considering the fire-retardant coating to influence steel temperature,the analysis of the stress performance,displacement change and plastic strain development status of the space grid structure in the process of the fire via ABAQUS finite element analysis software are researched and analysed.The damage degree of the structure after fire is determined according to the structure identification level standard and the suggestions to repair are put forward.