Abstract
Wind solicitations generate horizontal, tensile, and compressive stresses on building foundations. In empty light structures, such as agricultural greenhouses and, in the specific case of silos and elevated structures such as metal water tanks, the consideration of these loads becomes important because the lack of the weight component due to the storage load significantly influences the balance of forces. This study focused on the behavior of metallic steel profiles, aiming at its application as a foundation element for the pile, considering the soil of Diabasic origin common to the Center-South region of Brazil. Load tests in real scale were carried out on three steel profiles, type I, gauge W 250 mm x 32.7 kg m-1, drilled in the ground up to 12m deep by means of a pile driver. One steel profile was submitted to lateral loading, another to vertical compressive loading, and the other to vertical tensile load. Test results determined the bearing load of the pile for each loading type, calculated the soil reaction coefficient for lateral loading, and verified the applicability of load capacity prediction methods to tensile and compressive strengths of piles, commonly used in foundation projects.
Highlights
High lightweight structures (e.g., metal silos, metal water tanks, metal sheds, agricultural greenhouses, and others) must be designed to stand on their foundations
This study aims at providing the technical environment with relevant information regarding the behavior of the type of foundation studied, so that technically more appropriate and economically more feasible projects can be elaborated, allowing to reduce the empiricism in the parameters adopted within the conditions presented in this study
The norm ABNT-NBR 6122/2010 (Project and Execution of Foundations) establishes the need to carry out load tests on piles implanted in areas where there is no previous experience with the type of pile used
Summary
High lightweight structures (e.g., metal silos, metal (empty) water tanks, metal sheds, agricultural greenhouses, and others) must be designed to stand on their foundations. These buildings are supposed to withstand vertical compressive stress due to loading and own weight, and horizontal tensile and compressive forces caused by wind (Paschoalin Filho & Carvalho, 2010). It is noteworthy that several scientific studies have been conducted by technical and academic means in order to understand the structural behavior and foundations of rural constructions when submitted to the loads mentioned, such as Paschoalin Filho. In terms of total service load, the weight of the silo or water tank metal structure may not reach 1% of its stored load. Almost all the vertical component of the load is lost, an important part of the balance of forces when considering the horizontal resultant wind
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