| Promoting the development of prefabricated construction is an important direction of reform in China’s construction industry.Prefabricated structure wall is an important part of prefabricated construction,because of its flexible layout,great advantages in quality and speed.However,the connection of longitudinal stressed reinforcement of prefabricated wall is often the weak part of the structure,such as the most common grouting sleeve connection,which not only has high cost,but also directly affects the seismic ability of the construction because it is hard to ensure the construction quality and effective detection.Ultra High Performance Concrete（UHPC）is a kind of material with great engineering prospect.It own many advantages: high strength,high viscosity,high toughness,high durability and so on.UHPC is used in precast shear wall to form a new type of precast UHPC energy dissipation wall.The longitudinal reinforcement is lapped and post poured with UHPC to improve the mechanical performance of the joint,so as to absorb and dissipate more energy input during earthquake.Precast UHPC energy dissipation wall can effectively improve the seismic performance of precast structure wall,promote the development of building industrialization,promote industrial upgrading,improve construction efficiency,and realize energy conservation and emission reduction,which is in line with the current concept of green development in China.In this paper,the seismic ability of the three new type of precast UHPC energy dissipation walls with different forms and one normal structure wall are analyzed by quasi-static test and finite element simulation.The main research are as follows:（1）This paper systematically introduces the development of UHPC and precast structure wall,analyzes the application of UHPC in practical engineering,summarizes the development process and structural types of precast structure wall,and puts forward the feasibility of applying UHPC to precast structure wall.（2）The quasi-static testing is carried out about the three precast UHPC structure walls with different structures forms and one normal structure wall.The influence of UHPC layout on failure model,stiffness degradation,hysteretic behavior,deformation capacity and energy dissipation capacity of precast structure wall was studied.（3）Based on Open Sees simulation platform,the cast-in-place structure wall SW1 and precast UHPC energy dissipation structure wall UHPCSW2 are simulated by using the multiple vertical line element.The simulated data are in reasonable agreement with the experimental data.On this basis,the parameter analysis of UHPCSW2 is carried out to explore the influence of aspect ratio,axial compression ratio,reinforcement ratio of marginal structural column on the stiffness degradation,hysteretic behavior,deformation and energy dissipation capacity of specimens.（4）According to the Chinese code,a 12 story frame shear wall structure is designed by using PKPM,and the whole equivalent models of RC shear wall frame structure,precast UHPC energy dissipation shear wall frame structure and precast ECC energy dissipation wall frame structure are established through the verified finite element model.The static elastic-plastic analysis and dynamic time history analysis of the three structures are carried out,and 10 near-field impulse,near-field non impulse and far-field ground motions are selected as the excitation loads of the structure to explore the influence of different types of ground motions on the structure. |
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