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Shaking Table Test of a 1/4-Scale Self-centering Precast Reinforced Concrete Frame
Self-centering precast reinforced concrete frames can be a good solution to the problem of large residual deformation of conventional concrete frames due to earthquake damage. The use of unbonded prestressed tendons to assemble precast members in the frame can both speed up the construction schedule and achieve the self-centering goal. To study the seismic performance of assembled self-centering concrete frames, a 1/4-scale six-story model was designed and tested on a shaking table. The prefabricated beams and columns, as well as columns and foundations of the model, were connected by unbonded prestressed tendons, while the floor slabs and beams were connected by bolts. The inter-story drift, residual drift, uplift of the column-base joints, and opening of the beam-column joints were investigated to study the seismic performance of the structure. The results showed that the maximum uplift of column-base joints in the test was 2.14 mm, the maximum opening for beam-column was 1.47 mm, and the maximum residual drift of the structure was only 0.017% in the X direction, which achieved the self-centering target and proved the rationality of the design. The experiment indicates that the self-centering precast reinforced concrete frame has satisfactory seismic performance, which provides a case study for the engineering application of this kind of new structure system.
Shaking Table Test of a 1/4-Scale Self-centering Precast Reinforced Concrete Frame
Self-centering precast reinforced concrete frames can be a good solution to the problem of large residual deformation of conventional concrete frames due to earthquake damage. The use of unbonded prestressed tendons to assemble precast members in the frame can both speed up the construction schedule and achieve the self-centering goal. To study the seismic performance of assembled self-centering concrete frames, a 1/4-scale six-story model was designed and tested on a shaking table. The prefabricated beams and columns, as well as columns and foundations of the model, were connected by unbonded prestressed tendons, while the floor slabs and beams were connected by bolts. The inter-story drift, residual drift, uplift of the column-base joints, and opening of the beam-column joints were investigated to study the seismic performance of the structure. The results showed that the maximum uplift of column-base joints in the test was 2.14 mm, the maximum opening for beam-column was 1.47 mm, and the maximum residual drift of the structure was only 0.017% in the X direction, which achieved the self-centering target and proved the rationality of the design. The experiment indicates that the self-centering precast reinforced concrete frame has satisfactory seismic performance, which provides a case study for the engineering application of this kind of new structure system.
Shaking Table Test of a 1/4-Scale Self-centering Precast Reinforced Concrete Frame
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Çavunt, Derya (editor) / Çavunt, Yavuz Selim (editor) / Li, Yang (author) / Lu, Xilin (author)
International Symposium of the International Federation for Structural Concrete ; 2023 ; Istanbul, Türkiye
2023-06-03
10 pages
Article/Chapter (Book)
Electronic Resource
English
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