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(1 西南交通大學土木工程學院, 成都 610031; 2 四川省建筑設計研究院有限公司, 成都 610095;3 四川省建筑設計研究院有限公司復雜結構設計研究中心, 成都 610095)
摘要: 為了研究聚乙烯醇縮丁醛夾層玻璃(PVB 夾層玻璃)在剛性沖擊下的破壞模式和力學響應,采用基于近場動力學的鍵基 PD 模型模擬落錘沖擊作用下的沖擊力的變化情況及玻璃裂紋開展,并與試驗結果進行對比驗證;通過改變上、下玻璃層厚度、PVB 膠層厚度及沖擊初速度,系統(tǒng)研究 PVB 夾層玻璃的裂紋擴展規(guī)律和耗能特性. 結果表明:鍵基 PD 模型可以很好地再現(xiàn) PVB 夾層玻璃斷裂失效和裂紋擴展行為,和試驗吻合度很高;玻璃厚度越厚抗沖擊性能和耗能能力越強,下玻璃層厚度影響大于上玻璃層厚度影響. 隨著 PVB 膠層厚度的增加,PVB 夾層玻璃抗沖擊性能以及耗能能力隨之增加. 同等條件下,增大 PVB 膠層厚度,能有效增加玻璃的耗能能力,取得較大的單位厚度耗能比,但 PVB 膠層厚度大于 1. 14mm 后增幅變小. 保持沖擊能量不變,增大落錘的沖擊初速度,明顯改變了 PVB 夾層玻璃的破壞模式,其抗沖擊性能和玻璃耗能也隨之增加.
關鍵詞: 近場動力學; PVB 夾層玻璃; 剛性沖擊; 膠層厚度; 破壞模式; 力學響應
中圖分類號:TU524 文獻標志碼:A 文章編號:1002-848X(2023)07-0090-08
DOI:10. 19701 / j. jzjg. SADI2319
Numerical simulation of drop hammer impact on PVB laminated glass based on peridynamics
HU Xiaodong1, QI Xin1, ZHAO Shixing2,3, ZHANG Lijun1, YU Zhixiang1
(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2 Sichuan ProvincialArchitectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China; 3 Complex StructureDesign and Research Center, Sichuan Provincial Architectural Design andResearch Institute Co. , Ltd. , Chengdu 610095, China)
Abstract: In order to study the damage pattern and mechanical response of polyvinyl butyral laminated glass ( PVBlaminated glass) under rigid impact, the bond-based PD model based on peridynamics was used to simulate the impactforce and crack development of glass under the impact of drop hammer, and was compared with the test results. The crackexpansion pattern and energy consumption characteristics of the PVB laminated glass were systematically studied by varyingthe upper and lower glass thicknesses, the thickness of PVB adhesive layer and the initial impact velocity. The results showthat the bond-based PD model can simulate the spontaneous fracture failure and crack expansion behavior of PVB laminatedglass, and the agreement with the test is high. The thicker the glass thickness, the stronger of impact resistance and energydissipation capacity, and the effect of the lower glass layer thickness is greater than that of the upper glass layer thickness.As the thickness of PVB adhesive layer increases, the impact resistance and energy dissipation of PVB laminated glassincrease. Under the same conditions, increasing the thickness of PVB adhesive layer can effectively increase the energydissipation capacity of the glass and achieve a larger energy dissipation ratio per unit thickness, but the increase becomessmaller after the thickness of PVB adhesive layer is higher than 1. 14mm. By keeping the impact energy unchanged andincreasing initial impact velocity of the the drop hammer, the failure mode of PVB laminated glass is obviously changed,and the impact resistance and energy consumption of the glass are also increased.
Keywords:peridynamics; PVB laminated glass; rigid impact; thickness of adhesive layer; failure mode; mechanical response
∗四川省交通運輸科技項目(2018-B-03),2020 年度交通運輸行業(yè)重點科技項目(2020-MS3-10
第一作者:胡曉東,碩士研究生,主要從事結構沖擊防護研究,Email:2423657135@ qq. com.
[引用本文] 胡曉東,齊欣,趙仕興,等. 基于近場動力學的落錘沖擊 PVB 夾層玻璃數(shù)值模擬[ J]. 建筑結構,2023,53(7):90-97. HU Xiaodong,QI Xin,ZHAO Shixing,et al. Numerical simulation of drop hammer impact on PVB laminatedglass based on peridynamics[J]. Building Structure,2023,53(7):90-97.
