Abstract
The aim of the paper was to demonstrate the influence of reinforced steel parameters and quantity on the failure mechanism of four three-span models of reinforced concrete strips with the dimensions 7140×500×190 mm. Two models had only bottom reinforcement, while two were reinforced at the bottom and upper sides. The paper contains the description of the experimental stand and models along with the results of experimental tests which were compared with the results of the calculations based on traditional methods.
Highlights
The experimental research discussed in the article is the follow-up of the investigations of the behavior of narrow reinforced concrete slabs in an emergency situation induced by overloading [9, 10]
The purpose of the research was to determine the maximum value of the load that the reinforced concrete slab will be able to carry due to the membrane work, which appears in continuous elements in the event of even a slight vertical displacement
The presented experimental research was mainly aimed at observing the behavior of models and the emerging damages when both upper and bottom reinforcement were applied
Summary
The experimental research discussed in the article is the follow-up of the investigations of the behavior of narrow reinforced concrete slabs in an emergency situation induced by overloading [9, 10]. The second reason of overloading are the faults made at the design stage (e.g. improperly defined amount of reinforcement) or during the construction of buildings (e.g. supplying the concrete of incorrect strength parameters), resulting in damaging of the structure even with the correct value of load. The purpose of the research was to determine the maximum value of the load that the reinforced concrete slab will be able to carry due to the membrane work, which appears in continuous elements in the event of even a slight vertical displacement. The paper presents the results of the research of two models with the dimensions of 7140×500×190 mm, where upper support reinforcement was applied. Such a method of reinforcing is commonly applied in engineering practice
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