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As an innovative concrete shear wall, sandwich wall (SW) is expected to be applied to improve the seismic performance of regular shear wall (RW). The test process of SW component and precast SW structure are described, numerical models are verified by the test results, and parameter analysis is also conducted by numerical simulation to expand the tests. The results show that a better match between the stiffness, ductility, load capacity, and energy dissipation can be achieved by reasonably designing SW; there is little difference between the hysteretic performances of SW structures with different vertical loading modes, but different horizontal loading modes have great impact, it is suggested to use horizontal load distributed based on the first vibration mode or the inverted triangular, which is closer to the real seismic action. Then, the seismic design procedure of SW structure is proposed, the analysis of a design example shows that the seismic responses meet the requirements of all limit states; while the application of precast SW structure can save the consumption of concrete materials, reduce the amount of grout-filled sleeves, and reduce the complexity of assembly and workloads significantly. In addition, fragility analysis is also conducted to evaluate the seismic performance and collapse resistance of precast SW structure, the results show that the seismic performance of precast RW structure is slightly better than that of precast SW structure, however, there is little difference in the seismic fragility between SW structure and RW structure.
As an innovative concrete shear wall, sandwich wall (SW) is expected to be applied to improve the seismic performance of regular shear wall (RW). The test process of SW component and precast SW structure are described, numerical models are verified by the test results, and parameter analysis is also conducted by numerical simulation to expand the tests. The results show that a better match between the stiffness, ductility, load capacity, and energy dissipation can be achieved by reasonably designing SW; there is little difference between the hysteretic performances of SW structures with different vertical loading modes, but different horizontal loading modes have great impact, it is suggested to use horizontal load distributed based on the first vibration mode or the inverted triangular, which is closer to the real seismic action. Then, the seismic design procedure of SW structure is proposed, the analysis of a design example shows that the seismic responses meet the requirements of all limit states; while the application of precast SW structure can save the consumption of concrete materials, reduce the amount of grout-filled sleeves, and reduce the complexity of assembly and workloads significantly. In addition, fragility analysis is also conducted to evaluate the seismic performance and collapse resistance of precast SW structure, the results show that the seismic performance of precast RW structure is slightly better than that of precast SW structure, however, there is little difference in the seismic fragility between SW structure and RW structure.
Seismic Performance and Fragility Analysis of Precast Concrete Sandwich Wall Structure
Journal of Earthquake Engineering ; 27 ; 410-433
2023-01-25
24 pages
Article (Journal)
Electronic Resource
Unknown
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