Abstract
To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. This work presents the performance of a specific beam-to-column connection using corbels with different anchorage arrangements in precast beam-slab-column interior joint taken out from precast underground subway station. This paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading. Meanwhile, the influences of concrete corbels (including column- and beam-end corbels) on the shear strength and deformation are investigated. The analyses results indicated that (1) corbels of the laminated beam (composite beam) can obviously improve the shear stress of the core region, which was beneficial for specimen design followed the strong-joint-weak-member concept; (2) a simplified approach to deal with the uneven thickness of corbels in the core region was proposed, which was utilized to study the effect of thickness on the shear performance of the core region; (3) the shear stress increased with respect to the compression stress, and the shear strain had a trend of decreasing according to calculating results using modified compression field theory; and (4) the deterministic expressions were proposed to predict the designed load of column corbels based on three different connection methods between laminated beams and core region of joint.
Highlights
To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. is work presents the performance of a specific beam-to-column connection using corbels with different anchorage arrangements in precast beam-slab-column interior joint taken out from precast underground subway station. is paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading
The seismic performance of the underground structure is not as safe as one thought, which has been validated against the damages of some tunnels and stations [4, 5]. erefore, the seismic behavior of Advances in Civil Engineering underground structures should be first validated against the experimental results before they were applied
Shafaei et al [16, 17] studied the seismic performance of beam-column joints having either nonseismic or seismic reinforcement details, and the results indicated that rehabilitated methods can recover the mechanical properties
Summary
To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. is work presents the performance of a specific beam-to-column connection using corbels with different anchorage arrangements in precast beam-slab-column interior joint taken out from precast underground subway station. is paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading. To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. Is paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading. For these, the precast structures have many shortcomings, such as poorer integrality, insufficient energy consumption capacity, more difficult on-site installation, and connection methods of joints Another issue to be commended was that the available full-scale tests on the seismic behavior of connections, especially for underground structures, can be characterized as poor. Shafaei et al [16, 17] studied the seismic performance of beam-column joints having either nonseismic or seismic reinforcement details, and the results indicated that rehabilitated methods can recover the mechanical properties.
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