No abstract

The so-called “green” product is a relative concept. Because artificial products will more or less consume resources and energy and affect the environment. If a product can be thought of in the “earth way” at the beginning of design, including products and services, it has a lower impact on the environment than the traditional method in the past to achieve the goal of sustainable use. Be green products and the modular design in the green product design method, in addition to extending the life of parts, if its main parts can have a longer life, other components can be modularized according to their average life. Make the parts in each module have the same life, make the best use of them when replacing, and can replace and repair some parts after damage, reduce waste of resources and cost, and achieve the purpose of green design. This study only discusses the modular design for the environment, and discusses the feasible design schemes of its modular design from the green assembly and disassembly methods in its modular design, and then builds the green modular design assembly with case studies and disassembly design principles, and a set of green design assembly and disassembly evaluation benchmarks. According to this method, the best green modularization feasible design scheme of this case is designed.

No abstract

In order to explore the toughening performance and failure mechanism of hollow slab beams strengthened with prestressed steel strand polyurethane cement composite, three test beams (L1–L3) were strengthened and one test beam (L0) was used as a comparison. The influence of different tensile stresses of steel strand and fiber additions on the flexural bearing capacity of the hollow slab beams, was studied. The cracking characteristics, load deflection relationship, ductility and strain of each test beam were compared and analyzed. The test results showed that the toughened material was well bonded to the hollow slab beam and the steel strand, which effectively inhibited the development of cracks in the test beams. The flexural bearing capacity of the strengthened test beams was significantly improved. The use of prestressed steel strand polyurethane cement composite material effectively improved the flexural bearing capacity of the test beams, and this reinforcement process can be further extended to engineering applications.

No abstract