Abstract
This paper aims to study the seismic performance of multiple composite core column joints. The influence of the stress mechanism, axial compression ratio, and shear span ratio on the failure mode, hysteretic performance, and shear capacity of the multiple composite core column joints was studied through the low-reversed cyclic loading tests of three specially designed and manufactured multiple composite core column joints. The angle ratio method is used to calculate the effective area of the vertical tie bar, and based on the mechanism of the softening tension-compression bar, the formula for calculating the shear capacity of the joint with multiple composite core column is established. In addition, it is also verified by the test data in this paper. The experimental results show that when the axial compression ratio increases from 0.26 to 0.45, the number and width of cracks at the beam end decrease. When the shear span ratio increases from 1.67 to 2.22, the number and width of cracks at the joint beam end increase. The average value and standard deviation of the ratio between the measured value and the calculated value of the shear capacity are 0.97 and 0.16, indicating that the proposed calculation method has a high agreement with the actual value and strong engineering application.
Highlights
Beam-column joints play an important role in the transmission and distribution of internal forces and are the key to the seismic performance of the structure in the frame structure
Yang [19] studied the influence of axial compression ratio, stirrup spacing, stirrup ratio, and stirrup form on the seismic performance of multiple composite core columns and proposed the corresponding calculation formula of shear capacity and design suggestions
Wakabayshi et al [20] and Omine et al [21] found that the seismic performance of cored columns was significantly better than that of ordinary reinforced concrete columns in their studies under lowcyclic reciprocating loads
Summary
Beam-column joints play an important role in the transmission and distribution of internal forces and are the key to the seismic performance of the structure in the frame structure. Based on the above analysis, this paper carried out pseudostatic tests on the beam-column joints composed of multiple composite core columns, analyzed the effects of axial compression ratio and shear span ratio on the seismic performance of the joints, and proposed a formula for calculating the shear capacity of the multiple composite core column joints based on the mechanism of softening the tension and compression rods. It provides reference for the popularization and use of such nodes in engineering construction
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
