| With the implementation and development of China’s energy conservation and emissions reduction strategy and sustainable development strategy, it becomes necessary and urgent to research new wall materials performing well, protecting environment, saving materials and convenient for the industrialization production. This paper studied the seismic performance of two kinds of composite block walls integrated of bearing, insulation and decoration function.Composite self-insulation block has a good performance of building energy efficiency and considerable economic benefits and social benefits. But, because of the lack of specific technical indexes, engineering parameter and experimental data, its popularization and application are hindered. Therefore.this paper studied the seismic performance of two kinds of composite block walls integrated of bearing, insulation and decoration function.This paper made a level low reversed cyclic loading test on two pieces of composite self-insulation block walls with constructional columns, and made a comprehensive study the seismic performance of two different forms of composite self-insulation blocks. It mainly described the failure mechanism of the wall, painted hysteresis curves and skeleton curves of the forced walls, and analyzed the walls’ seismic performance metrics such as bearing capacity, deformation capacity, ductility, energy dissipation and stiffness degradation. Meanwhile, this paper used the large general finite element software ABAQUS to make a simulate analysis of the composite self-insulated walls’ seismic performance. Then, it compared them with experimental results, and studied proper finite element simulation methods for the composite self-insulation block walls.The main research results are as follows:(1) The destruction mechanism of the composite self-insulated walls is similar to other masonry structures. All of them experienced three phases, including the elastic stage, elastic-plastic stage and destruction down stage. The cracks mainly distributed in the gray sew, and the main crack presented an "X" shape.(2) The seismic indicators of the composite self-insulated walls are similar to traditional masonry structures, showing good seismic performance.(3) The outside blade surface (Protection decorative surface) of the composite self-insulated walls showed a good connection performance, and there’s no obvious outer drum and falls off phenomenon under low reversed cyclic loading.(4) This paper used the Concrete Damage Plasticity model in ABAQUS to model for the wall as a whole, and conducted low reversed cyclic loading. Also, it simulated the fracture distribution through the cloud PEEQ equivalent plastic deformation and loss of the model parameters.The results show that it’s feasible to use this kind of finite element simulation method to simulate composite self-insulated walls.(5) Based on the experimental results and related literature, it put forward recommended formula to calculated the seismic and anti-shear bearing capacity of composite self-insulation block walls. Its’ calculated values and measured values are highly coincided, therefore, it can be used for reference in engineering application. |
