Study on the mechanical behavior of the exterior wall of old masonry structures with the integration of reinforcement and insulation

Abstract

Reinforcement has high requirements in terms of efficiency, and rapid reinforcement reduces the impact on people's travel. A masonry structure is a relatively common structural form, but many masonry structures lack insulation systems, so this work systematically studied the integration of thermal insulation. In this test, two comparison components and two grouting and reinforcement components were prepared for the axial compression test and quasi-static test. In terms of materials, to ensure the accuracy of the test, this work selects old sintered bricks of the same era. In terms of the strength of the mortar, weakening was performed. The test results show that in the axial compression test, the peak load of axial compression increased by 80 %, and the energy consumption increased by nearly 800 %. In the seismic test, the displacement increased by 108 %, and the energy dissipation capacity of the specimen increased by 110.5 %. Thus, when an earthquake strikes, the masonry structure can absorb more energy. In numerical simulations, the use of separate and integral modeling can ensure the model convergence and accurately reflect the failure of cracks. The model results show that the load displacement curve is similar to the test value in terms of axial compression. In the quasi-static test, the stress contours, skeleton curves, and failure phenomena obtained are close to the test values, and the error is approximately 5 %.