The text discusses various papers and research studies that focus on the structural behavior of precast sandwich panels. The studies examine the influence of factors such as eccentric loading, shear strength, creep of concrete, and insulation on the behavior of these panels. These papers provide analysis and design guidelines for precast sandwich panels, as well as investigating their behavior under various loading conditions. The studies also highlight the use of external bonding for strengthening precast concrete shear beams. Overall, the research emphasizes the importance of understanding the behavior of precast sandwich panels for designing and constructing resilient building structures.