爆炸作用下框支式聚乙烯醇缩丁醛夹层玻璃的破坏模式

Failure Mode of Framed Polyvinyl-Butyral-Laminated Glass Subjected to Blast Loading

摘要:

以工程中广泛应用的框支式聚乙烯醇缩丁醛（polyvinyl butyral，PVB）夹层玻璃为对象，通过有限元分析，结合场地爆炸试验，对爆炸作用下框支式PVB夹层玻璃的破坏模式展开了系统研究。首先采用LS-DYNA软件建立了框支式PVB夹层玻璃受爆响应的有限元分析模型，分析发现PVB夹层玻璃在不同爆炸作用下可能发生整体型破坏、局部型（冲切型）破坏或混合型破坏模式，不同破坏模式与PVB撕裂时刻的面板残余动能比相关。进一步通过场地爆炸试验对不同破坏模式进行验证。结果可为框支式PVB夹层玻璃幕墙的抗爆设计提供参考。

Abstract:

In this paper， a systematic study on the failure mode of framed PVB laminated glass， which is commonly used in practical engineering， is conducted based on dynamic nonlinear finite element analysis and field blast test. First， a fine finite element model for simulating framed PVB laminated glass subjected to blast loading is developed using LS-DYNA. Based on numerical analysis， three different failure modes， i.e. global failure， local （punching） failure， and mixed failure， are identified for framed PVB laminated glass in different explosions. The failure mode is found to be dependent on the residual energy ratio of the laminated glass at PVB rupture. Furthermore， the identified failure modes are verified by a series of field blast tests. The results of this study can provide reference for practical engineering blast resistant design of framed PVB laminated glass curtain wall.