Abstract
The high-strength bolt shear connector in prefabricated concrete slab has advantages in applications as it reduces time during the construction of steel-concrete composite building structures and bridges. In this research, an innovative and advanced bolt shear connector in steel-concrete composite structures is proposed. To investigate the fundamental mechanical behavior and the damage form, 22 static push-off tests were conducted with consideration of different bolt dimensions, the reserved hole constraint condition, and the dimension of slab holes. A finite element (FE) model was established and verified by using test results, and then the model was utilized to investigate the influence of concrete strength, bolt dimension, yield strength, bolt pretension, as well as length-to-diameter ratio of high strength bolts on the performances of shear connectors. On the basis of FE simulation and test results, new design formulas for the calculation of shear resistance behavior were proposed, and comparisons were made with current standards, including AISC, EN 1994-1-1, GB 50017-2017, and relevant references, to check the calculation efficiency. It is confirmed that the proposed equation is in better agreement with the experimental results.
Highlights
A mechanical shear connector is an essential component of composite steel-concrete beams to ensure stability [1]
Comprehensive studies on shear performance and the mechanisms of this shear connector have been conducted [2,3,4,5]. Results based on those studies showed that shear capacity of headed stud connectors is governed by the concrete strength, and the dimension and yield strength of shear studs
GivenGiven the results presented in Figure which 8, showed different hole diameter ratios the presented in at different hole diameter ratios (D/d)
Summary
A mechanical shear connector is an essential component of composite steel-concrete beams to ensure stability [1]. A shear connector is applied to transfer the shear forces across steel beams and concrete slabs. Comprehensive studies on shear performance and the mechanisms of this shear connector have been conducted [2,3,4,5]. Results based on those studies showed that shear capacity of headed stud connectors is governed by the concrete strength, and the dimension and yield strength of shear studs. In recent decades, prefabricated structures have been widely built as they make construction environmentally-friendly and efficient [6,7,8].
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