This paper analyzes the existing problems in the practical engineering design, resulting from the mechanical properties of two-way composite concrete slabs with precast ribbed panels (CSPRPs). Due to the influence of the structurally orthotropic characteristic, the calculation formulas for the deflection and bending moments of a CSPRP with three supported edges and one clamped edge under a uniformly distributed load are solved using the load superposition method and the orthotropic plate theory. The CSPRP is calculated as an equivalent isotropic cast-in-place twoway slab using the transformation of function, and the application of the equivalent span ratio. The simplified elastic design method is presented for a CSPRP with three supported edges and one clamped edge under a uniformly distributed load. The elasticity coefficients of the CSPRP with the equivalent span ratio, ranging from 0.5 to 1.0 and stiffness ratios of 0.5 and 2 are obtained using the programming calculation. The linear interpolation method is applied using the equivalent span ratio of an isotropic cast-in-place two-way slab, and one example of a CSPRP with three supported edges and one clamped edge is given to verify. The results show that the simplified elastic design method is accurate and feasible.concrete composite slab, elastic design method, orthotropic characteristic, three supported edges and one clamped edge, two-way slab | INTRODUCTIONA concrete composite slab is composed of precast ribbed panels and a cast-in-place concrete topping. It has been widely used in the construction of floors in building structures and decks in bridges because of its fast building assembly, significant time and labor savings, and good integrity and seismic performance. [1][2][3][4] Concrete composite slabs can be classified in a variety of ways. For example, composite slabs with precast concrete bottom panels, which are divided into solid plates, hollow plates, and T-shaped plates 5 ; composite slabs with a rough surface or with shear connectors. 6 Extensive efforts have been made on the composite slabs with precast concrete bottom panels, to investigate the interface shear performance between precast panels and cast-in-place concrete. The reported results include: (1) precast panels with naturally rough surfaces met the requirements of shear bearing capacity under the service load 7-9 ; (2) shear connectors took effect only when a bond slip occurred beyond the service load. 10,11 The horizontal shear strength at the interface between concrete surfaces has also been studied extensively. [12][13][14][15][16][17][18][19][20] These studies mainly focused on the effect of concrete strength and the type of surface treatment on the interface shear strength. As these studies were mostly conducted toward understanding of the shear friction theory, the specimens usually included a dowel reinforcement crossing the interface. The experimental findings obtained from these studies can be used to evaluate the accuracy of horizontal shear strength equations available in se...
This study investigates structural behavior of shear connectors in glass fiber-reinforced polymer (GFRP)-concrete composite bridge deck slabs. Five kinds of push-out specimens with GFRP shear connectors were prepared and tested. The failure modes of the specimens were observed, and the load-slip curves were obtained. The effects of rib shapes, presence of holes, and existence of transverse rebars on failure mode, shear resistance, and ductility were investigated. Results showed that (1) the shear resistance and ductility of T-type rib shear connectors were greater than those of flat plate shear connectors. (2) Shear resistance and ductility were significantly improved by holes. (3) The transverse rebar has a significant influence on the failure mode. The concrete slabs in the specimens without a transverse rebar failed. Similarly, the GFRP shear connector in the specimens with a transverse rebar collapsed. (4) All of the specimens showed a similar failure mode caused by the shearing failure of the connectors in the root when the transverse rebar was applied. Furthermore, the shear resistance and ductility of GFRP shear connectors decreased as the number of transverse rebars increased. Empirical equations were proposed to predict the shear resistance and validated with the test data.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.