Simulation calculation research on key indicators in pointin-place reinforcement technology for external thermal insulation

In recent years, frequent occurrences of building exterior insulation detachment have attracted significant public concern. This study investigates the pointin-place reinforcement technique by employing the finite element method to simulate and analyze the behavior of anchor bolts and adhesive layers after reinforcement. To identify the most effective reinforcement strategy, several different scenarios were modeled: bonding rates of 50% and 80%, and reinforcement configurations involving 2, 3, 4, 5, and 6 anchoring points. The stress distribution characteristics of both the anchor bolts and adhesive layers were systematically examined. The results indicate that, at a 50% bonding rate, the reinforcement scheme utilizing three anchoring points exhibits a lower degree of stress concentration, with a more balanced stress distribution between the anchor bolts and adhesive layer. When reinforcement is achieved solely through grouting without mechanical anchoring, configurations with 4, 5, and 6 reinforcement points demonstrate improved performance due to reduced stress concentration in the adhesive layer. At an 80% bonding rate, the stress distribution across reinforcement schemes with 2, 3, 4, and 5 anchoring points is relatively uniform.