Precast concrete sandwich wall panels with bolted angle connections tested in flexure under simulate

PCI journal

Nathan Teixeira¹ 

关键词: 2016;    201607;    August;    July;    PCI Journal;    Article;    Publications;    Year;    J2016;    Journal;    Pubs;    Month;    Name;    Type;   

DOI  :  

学科分类：建筑学

来源: Precast - Prestressed Concrete Institute

【 摘 要 】

In this study, flexural tests were performed on precast concrete sandwich wall panels with various end support conditions, loading orientations, and reinforcement and shear connector materials. Bolted angle connections were used to simulate practical support conditions while loads were applied in a manner to simulate windward pressure as well as suction. Panels with steel and basalt-fiber-reinforced polymer (BFRP) longitudinal reinforcement were tested and compared. Discrete steel and BFRP shear connectors were also used and evaluated. The bolted angle connections provided partial end fixity, thereby increasing the overall strength and stiffness relative to identical panels simply supported by rollers during testing. In all cases the bolted connections succeeded in developing the full strength of the sandwich wall panels. Panels with steel reinforcement failed due to rupturing of flexural reinforcement, while a panel with BFRP reinforcement failed due to rupturing of shear connectors and crushing of concrete in one wythe. Panels loaded in the direction of wind pressure achieved higher peak loads than identical panels loaded to simulate suction. An independent analytical model accounting for material nonlinearity, end support conditions, and partial composite action from the shear transfer system was developed. The model accurately predicted flexural stiffness, while the peak load was underestimated in most cases.

【 授权许可】

Unknown