基于中欧雪荷载规范的门式刚架加固有限元模型力学性能对比研究  

Comparative Study on Mechanical Performance of Finite Element Models for Strengthened Portal Frames based on Chinese and European Snow Load Codes

作　　者：魏超凡 赵贵金 张新杰 梁燕丽 WEI Chaofan;ZHAO Guijin;ZHANG Xinjie;LIANG Yanli(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Hebei Branch,CCCC Gas&Heat Research and Design Institute Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]河北工程大学土木工程学院,邯郸056038 [2]中交城市能源研究设计院有限公司河北分公司,石家庄050000

出　　处：《粉煤灰综合利用》2025年第2期117-123,共7页Fly Ash Comprehensive Utilization

摘　　要：为探究GB 51022—2015《门式刚架轻型房屋钢结构技术规范》与《NF EN 1991-1-3:2004-General actions-Snow loads》中雪荷载规范对门式刚架结构的影响,通过规范参数对比及有限元建模,选取改变结构体系法和粘钢法加固工程案例建立Midas Gen模型,对比验证两种规范下结构应力比、稳定性及挠度等力学指标。结果表明:《中国规范》雪荷载计算方法较为简单,两种规范部分参数与屋面积雪分布系数存在一定差异;有限元模型计算结果显示,《中国规范》雪荷载值和力学参数计算结果普遍偏大,尤其在不均匀分布上呈现更大保守性,而《欧洲规范》计算结果整体偏小。To investigate the impact of snow load specifications in GB 51022—2015*Technical Specification for Steel Structure of Light-weight Buildings with Gabled Frames*and*NF EN 1991-1-3:2004-General actions-Snow loads*on gabled frame structures,this study conducted parameter comparisons between the codes and established Midas Gen models for engineering cases reinforced via structural system modification and bonded steel reinforcement methods.Stress ratios,stability,deflection,and other mechanical indicators under both specifications were compared and validated through finite element modeling.Results indicate:the Chinese code employs a relatively simplified snow load calculation method,with partial parameters and roof snow distribution coefficients differing from the European code.Finite element analysis reveals that the Chinese code yields generally higher snow load values and mechanical parameter results,particularly demonstrating greater conservatism in uneven snow distribution scenarios,while the European code produces smaller calculation results overall.

关 键 词：门式刚架加固 雪荷载 《中国规范》 《欧洲规范》 有限元分析 

分 类 号：TU391[建筑科学—结构工程]