Integrity of Shear Connection Mechanisms in Precast Concrete Insulated Wall Panels

预制混凝土隔热板通常用作外墙。它们是有利的，因为它们在结构上和热效率高。它们由两层钢筋混凝土层组成，包围着一层绝缘层。混凝土层用被称为剪力连接件的拉杆连接。在今天使用的大多数板中，剪力连接件在荷载下变形，导致混凝土层之间的相对滑动。相对于实心板，这种滑动降低了板的强度和刚度（即，它们在相同载荷下变形更多）。在当前的设计指南中没有考虑滑移;面板是根据保守的假设和设计师的经验设计的。

Precast concrete insulated panels are commonly used as exterior walls. They are advantageous as they are structurally and thermally efficient. They consist of two reinforced concrete layers that surround a layer of insulation. The concrete layers are connected with ties called shear connectors. In most panels used today, shear connectors deform under load resulting in relative slip between the concrete layers. This slip reduces panel strength and stiffness (i.e. they deform more under the same load) relative to solid panels. Slip is not accounted for in current design guides; panels are designed based on conservative assumptions and designer experience.