Seismic Damage Research Of New Type Gypsum Concrete Composite Wall

With the development and progress of the technology,the requirements of the building structure and materials are continuously improving.The structural which form from the glass fiber gypsum board is also appeared.Gypsum board can not only be used as the structure of the outside permanent template,but also to participate in load-bearing of the structure.At the same time,the industrial by-product gypsum can also reflect the advantages in the field of energy-saving and environment-protection.Australia has gone ahead of us in this category.Prefabricated gypsum board in which cast concrete as load-bearing structure could be transported to the construction site conveniently.This structure is both beautiful and practical.The key is to improve the mechanical properties of the original gypsum board with vertical cavity in it.Setting horizontal holes along the high direction of the plaster board with vertical holes already to constitute a new form of gypsum concrete composite wall with the lattice type of dense column and beam after pouring concrete.Low cycle repeated load test of two new type of gypsum concrete composite walls is carried out to obtain their seismic performance such as damage characteristics,hysteretic behavior,bearing capacity and so on.Furthermore,the damage mechanism and failure process for specimen is analyzed in this paper.According to the characteristics of the test,proposing a new damage model based on the Park model and its improved models.The new damage model is independent on monotonic loading test results as well as take the wall cracking factors into consideration.Through the comparison of the test results,the new model can accurately describe the damage development of the test pieces.It not only has a strong applicability for the new type of gypsum concrete composite walls but also has a low sensitivity to cracking displacement.The model can still give a reasonable damage index for other types of concrete structures.