Elastic solutions for stresses in compliance-tailored adhesive anchors

Joining of structures via adhesive anchors is theoretical and practical engineering importance, including that support concrete ceilings in urban infrastructure. Such typically fail due to stress concentrations at the loaded and/or embedded ends, captured by well-known ‘shear-lag’ model. Herein, such are revisited considering elastic properties variation along embedment length discrete steps, reduce critical concentrations, thereby minimize propensity failure. Initially, a closed-form solution developed for system with single-step compliance (henceforth referred as double-adhesive bondline), which agrees well Finite Element simulations. The simplest tailoring found maximum shear 43% while maintaining super-critical bondlength characteristics designs. framework thus extended systems comprising an arbitrary number adhesives considering, fixed free boundary conditions embedded-end, allow parametric evaluation optimal reduction (maximum reduces 46% triple-adhesive bondline) critical-length characteristics. could be effectively applied employing facile bondline compliant near loaded-end stiffer embedded-end. particular case Boston tunnel anchor problem analyzed exemplary demonstration approach.