Abstract
The composite construction strategies realize an increasing number of sizeable applications in regions like bridges, ramps, homes, and different exceptional places. The component of composite structure considered in the study contains composite slab, profiled steel sheeting, steel beam, shear connector, and reinforcement cages. The investigation mainly focused on the structural performance of demountable shear connectors in composite slabs and steel beams with profiled steel sheeting. An extensive nonlinear finite element model was used to carry out in FE software Abaqus 6.14. Nonlinear behavior of concrete, stud connector, profiled steel sheeting, reinforcement cage, and steel beam are included in the finite element model. In this study, 24 specimens were taken into consideration to investigate the capacity of the shear connection, the load-slip curve of stud, failures modes of demountable shear connectors, and concrete crushing in the composite floor with profiled steel sheeting. The analysis confirmed that as the diameter of the shear connector increased from 19 to 22 mm, the capacity of the shear connector also increased by 54.313% and 28.903% in both open through and reentrant profiled steel sheeting, respectively. In addition, as the height of the profiled steel sheeting increased from 50 to 64 mm, the capacity of the shear connector is increased by 11.601% and 32.564% in open through and reentrant profiled steel sheeting, respectively. Similarly, when the concrete grade increased from C-40 to C-60, the capacity of the shear connector also increased by 70.128% and 48.301% with open and reentrant profiled steel sheeting, respectively. Furthermore, sensitivity analysis is done to see how much each input parameters affect the output parameter.
Highlights
Composite structures are more widely used and applicable in different construction areas throughout the world. ose structures are created by combining two or more structural elements to act as a single structural element, where each component behaves in a structurally efficient manner. e physical properties of each material combined to form a single unit that acts as a one-unit structure having a better performance than its separate parts. e system is about safety; it considers the economy as the main criterion
In steel-concrete composite structures, the concrete is good in compression, and the steel is good in tension. e combination results in a highly efficient structural performance taking safety and economy as the primary consideration
According to the experimental result, two main failure modes were observed. e first mode of failure is concrete cone slab crushing and cracks, which happened without shear connector fracture. e concrete around the connector is failed in compression before the shear connector reached its ultimate capacity. e crushing of concrete started from the head of the shear connector through its depth in the concrete slab, forming a cone shape. e second mode of failure is shear connector fracture or yielding before concrete slab crushing
Summary
Composite structures are more widely used and applicable in different construction areas throughout the world. ose structures are created by combining two or more structural elements to act as a single structural element, where each component behaves in a structurally efficient manner. e physical properties of each material combined to form a single unit that acts as a one-unit structure having a better performance than its separate parts. e system is about safety; it considers the economy as the main criterion. Monotonic loading is considered in the study to see the effect of cyclic loading, which resulted in cyclic degradation In another case, some studies have been conducted on the behavior of composite structures made from the concrete slab with profiled steel sheeting and steel I-section beam, both experimentally and numerically [9,10,11,12,13]. An experimental investigation is carried out to access the shear strength, stiffness, and ductility of demountable shear connectors in composite structures, that are made from concrete cone slabs with profiled steel sheeting and steel I-beam [15]. E main objective of this paper was to investigate the performance of demountable shear connections in composite slab and steel I-section beams with reentrant and open trough profiled steel sheeting. The result obtained from finite element analysis is compared to the empirical formula provided by Eurocode for the prediction of shear capacity of studs in the composite structure; and sensitivity analysis was conducted to investigate the effect of input parameters on output parameter
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