Abstract
This paper proposes a new bridge reinforcement approach grounded in the technologically mature and extensively studied polymer mortar-HSSWM reinforcement technology. To verify the feasibility of this reinforcement method, this paper investigates the mechanical properties of high-strength steel wire mesh-polyurethane cement (HSSWM-PUC) composites through bond anchorage tests. The bond anchorage test of HSSWM with PUC was completed by setting wire diameter, longitudinal wire relative anchorage length, and transverse wire spacing as test variables. Some of the test results were verified by finite element analysis. The finite element model was established with the number of transverse wires, wire spacing, relative anchorage length, and wire diameter as variables. The experimental results were further studied and analyzed. The slip, ultimate load, and load-slip relationships of HSSWM and PUC under different variables were explored. Building upon this foundation, the variation rule between bond stress and slip of HSSWM-PUC composites is analyzed. Reducing the transverse wire spacing was found to increase the ability of the transverse wires to restrain the longitudinal wires. Meanwhile, with the increase of wire diameter, the bonding stress between HSSWM and PUC gradually decreases, whereas the bonding performance of PUC can be improved by appropriately reducing the ratio of adhesive powder.
Keywords: HSSWM; PUC; bonded anchorage test; finite element model