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Composite CFST column to H-shaped steel beam joint: Experimental and numerical investigation
https://orcid.org/0000-0001-5991-1261
https://orcid.org/0000-0002-8353-6112
Highlights The cyclic behavior and self-centering (SC) performance of CFST column to steel beam joint with PT steel tendons arranged in column was experimentally and numerically investigated. The inelastic deformation of the joint specimens was between 3% and 5% of the maximum loading displacement after unloading, showing excellent SC performance. The SC performance of the joints can be improved with the increase of the number of steel tendons. The bending capacity of the joints increased with the increase of axial compression ratio, width-thickness ratio, diameter of steel tendons and connecting diaphragm strength.
Abstract Conventional CFST column-to-steel beam connection has excellent collapse-resist capacity, good plastic deformation, and high energy dissipation. However, it makes reconstruction challenging after extreme inelastic deformation in a severe earthquake. This paper proposes a self-centering (SC) composite CFST column to H-shaped beam joint (SCCCB joint) using post-tensioned (PT) tendons. The residual deformation of the splicing column can be greatly reduced under the action of pre-tension tendons. Cyclic loading tests were performed on five 1/3 scale test specimens with the main parameter of axial compression ratio (n = 0.10, 0.12, 0.15, and 0.17) and steel tendon types (with or without cutting processing) to investigate the cyclic behaviour and SC performance. The finite element models were established to capture the stress distribution of the joints. Finally, the seismic and SC performance of the joints were studied by the parametrical analysis including five parameters: width-thickness ratio of steel tube (D/t), diameter, number and spacing of steel tendons (d, ns and s), and connecting diaphragm strength (fy,a). The SC performance can be improved with the increase of ns. The bending capacity of the joints increased with the increase of n, D/t, d and fy,a.
Composite CFST column to H-shaped steel beam joint: Experimental and numerical investigation
https://orcid.org/0000-0001-5991-1261
https://orcid.org/0000-0002-8353-6112
Highlights The cyclic behavior and self-centering (SC) performance of CFST column to steel beam joint with PT steel tendons arranged in column was experimentally and numerically investigated. The inelastic deformation of the joint specimens was between 3% and 5% of the maximum loading displacement after unloading, showing excellent SC performance. The SC performance of the joints can be improved with the increase of the number of steel tendons. The bending capacity of the joints increased with the increase of axial compression ratio, width-thickness ratio, diameter of steel tendons and connecting diaphragm strength.
Abstract Conventional CFST column-to-steel beam connection has excellent collapse-resist capacity, good plastic deformation, and high energy dissipation. However, it makes reconstruction challenging after extreme inelastic deformation in a severe earthquake. This paper proposes a self-centering (SC) composite CFST column to H-shaped beam joint (SCCCB joint) using post-tensioned (PT) tendons. The residual deformation of the splicing column can be greatly reduced under the action of pre-tension tendons. Cyclic loading tests were performed on five 1/3 scale test specimens with the main parameter of axial compression ratio (n = 0.10, 0.12, 0.15, and 0.17) and steel tendon types (with or without cutting processing) to investigate the cyclic behaviour and SC performance. The finite element models were established to capture the stress distribution of the joints. Finally, the seismic and SC performance of the joints were studied by the parametrical analysis including five parameters: width-thickness ratio of steel tube (D/t), diameter, number and spacing of steel tendons (d, ns and s), and connecting diaphragm strength (fy,a). The SC performance can be improved with the increase of ns. The bending capacity of the joints increased with the increase of n, D/t, d and fy,a.
Composite CFST column to H-shaped steel beam joint: Experimental and numerical investigation
https://orcid.org/0000-0001-5991-1261
https://orcid.org/0000-0002-8353-6112
Highlights The cyclic behavior and self-centering (SC) performance of CFST column to steel beam joint with PT steel tendons arranged in column was experimentally and numerically investigated. The inelastic deformation of the joint specimens was between 3% and 5% of the maximum loading displacement after unloading, showing excellent SC performance. The SC performance of the joints can be improved with the increase of the number of steel tendons. The bending capacity of the joints increased with the increase of axial compression ratio, width-thickness ratio, diameter of steel tendons and connecting diaphragm strength.
Abstract Conventional CFST column-to-steel beam connection has excellent collapse-resist capacity, good plastic deformation, and high energy dissipation. However, it makes reconstruction challenging after extreme inelastic deformation in a severe earthquake. This paper proposes a self-centering (SC) composite CFST column to H-shaped beam joint (SCCCB joint) using post-tensioned (PT) tendons. The residual deformation of the splicing column can be greatly reduced under the action of pre-tension tendons. Cyclic loading tests were performed on five 1/3 scale test specimens with the main parameter of axial compression ratio (n = 0.10, 0.12, 0.15, and 0.17) and steel tendon types (with or without cutting processing) to investigate the cyclic behaviour and SC performance. The finite element models were established to capture the stress distribution of the joints. Finally, the seismic and SC performance of the joints were studied by the parametrical analysis including five parameters: width-thickness ratio of steel tube (D/t), diameter, number and spacing of steel tendons (d, ns and s), and connecting diaphragm strength (fy,a). The SC performance can be improved with the increase of ns. The bending capacity of the joints increased with the increase of n, D/t, d and fy,a.
Composite CFST column to H-shaped steel beam joint: Experimental and numerical investigation
Mou, Ben (author) / Yan, Xingchen (author) / Yu, Yujie (author) / Wang, Zian (author)
Engineering Structures ; 299
2023-10-22
Article (Journal)
Electronic Resource
English