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Hysteretic behavior and moment-rotation model of self-centering beam-column connection with angle steel
Abstract The objective of this study is to develop a moment-rotation model (M-θ) to evaluate the hysteresis behavior of self-centering beam-column connection with replaceable angle steel. Based on the previous pseudo-static test results of 13 groups of 22 beam-column joint specimens, the hysteretic behavior of the joint and the prestress loss of the post-tensioned (PT) strand are further studied. According to the phased hysteretic characteristic of the beam-column joint and the connection characteristic of two interfaces, the M-θ model for beam-column connection is established, which is divided by four key points: opening point, yield point, peak point and ultimate point. The proposed M-θ model includes the bilinear moment-rotation (M-θ s) model of the endplate-bolt interface based on the component method, and the trilinear moment-rotation (M-θ r) model of the self-centering interface considering the prestress loss of PT strand and the phased mechanical behavior of each component. The accuracy of the proposed M-θ model is verified by the comparisons of theoretical calculation results and experimental skeleton curves, which provides a theoretical basis for the engineering design of this kind self-centering beam-column connection.
Highlights The staged hysteresis characteristic is proposed. Detailed mechanical analysis is carried out for endplate-bolt and self-centering interface. The moment calculation method of bending capacity of PT strand considering prestress loss is proposed. The calculation method of angle steel and stiffener angle steel is proposed. The M-θ model for self-centering beam-column connection is proposed.
Hysteretic behavior and moment-rotation model of self-centering beam-column connection with angle steel
Abstract The objective of this study is to develop a moment-rotation model (M-θ) to evaluate the hysteresis behavior of self-centering beam-column connection with replaceable angle steel. Based on the previous pseudo-static test results of 13 groups of 22 beam-column joint specimens, the hysteretic behavior of the joint and the prestress loss of the post-tensioned (PT) strand are further studied. According to the phased hysteretic characteristic of the beam-column joint and the connection characteristic of two interfaces, the M-θ model for beam-column connection is established, which is divided by four key points: opening point, yield point, peak point and ultimate point. The proposed M-θ model includes the bilinear moment-rotation (M-θ s) model of the endplate-bolt interface based on the component method, and the trilinear moment-rotation (M-θ r) model of the self-centering interface considering the prestress loss of PT strand and the phased mechanical behavior of each component. The accuracy of the proposed M-θ model is verified by the comparisons of theoretical calculation results and experimental skeleton curves, which provides a theoretical basis for the engineering design of this kind self-centering beam-column connection.
Highlights The staged hysteresis characteristic is proposed. Detailed mechanical analysis is carried out for endplate-bolt and self-centering interface. The moment calculation method of bending capacity of PT strand considering prestress loss is proposed. The calculation method of angle steel and stiffener angle steel is proposed. The M-θ model for self-centering beam-column connection is proposed.
Hysteretic behavior and moment-rotation model of self-centering beam-column connection with angle steel
Sun, Dongde (author) / Yang, Yong (author) / Miao, Jijun (author) / Liu, Caiwei (author) / Xue, Weichen (author)
2023-12-09
Article (Journal)
Electronic Resource
English
Hysteretic behavior of steel moment resisting column bases
| British Library Conference Proceedings | 2000