建筑结构学报2025，Vol.46Issue(12)：44-62,19.DOI:10.14006/j.jzjgxb.2025.0094
环境-荷载耦合作用下隐框玻璃幕墙硅酮结构密封胶耐久性能试验研究
Experimental study on durability of silicone structural sealant for hidden-frame glass curtain wall under coupled environmental and load effects
摘要
Abstract
The durability of silicone structural sealant(SSS)is a decisive factor governing the long-term performance of hidden-frame glass curtain walls.However,existing studies still lack sufficient understanding of the coupling effects among the four primary aging factors-temperature,relative humidity,stress,and ultraviolet(UV)radiation,as well as the corresponding aging mathematical models.To investigate the durability of SSS under coupled environmental and load effects,artificial accelerated aging tests were conducted under multi-gradient matrix combination conditions.The test conditions ranged from 15-65 ℃ in temperature,10％-70％in relative humidity,0-0.14 MPa in stress,and 0-40 W/m2 in UV radiation intensity.The influence mechanisms of these four aging factors on tensile bonding performance and Shore hardness were analyzed.A degradation model for the tensile bonding strength(TBS)was then established,considering both the strengthening effect of cross-linking reactions and the coupling effects of aging factors,to calculate the TBS under various environmental conditions at different aging times.Parameter estimation was performed using the Markov Chain Monte Carlo(MCMC)method.The results indicate that increases in temperature,relative humidity,stress,and UV radiation intensity accelerate both the initial increase and the subsequent decline in TBS during the aging process.The order of influence on TBS changes,from strongest to weakest,is UV radiation intensity,temperature,relative humidity,and stress.Higher temperature,humidity,and UV intensity improve the extensibility of the sealant,whereas increased stress reduces it.Coupling effects were observed among all aging factors,with UV radiation being the most significant,and its influence is primarily manifested through coupling interactions.The calculated results from the aging degradation model show good agreement with experimental data,confirming its correctness and validity,and the model can be used for service-life prediction of SSS.关键词
硅酮结构密封胶/人工加速老化试验/老化规律/老化数学模型/马尔科夫链蒙特卡洛法Key words
silicone structural sealant/artificial accelerated aging test/aging pattern/degradation model/MCMC method分类
建筑与水利引用本文复制引用
刘军进,杨博,李建辉,王超,王智远..环境-荷载耦合作用下隐框玻璃幕墙硅酮结构密封胶耐久性能试验研究[J].建筑结构学报,2025,46(12):44-62,19.基金项目
国家重点研发计划项目(2024YFC3810500),中建研科技股份有限公司自筹科研基金项目(20251902977130014). （2024YFC3810500）
