Abstract
For industrial buildings and logistics centres truck lifts are usually used. Therefore, there are special requirements for flatness tolerance of ground floor. The ground floor settlements differences in selected distances are limited. The article reviews the behaviour of soils and the importance of the actual behaviour assessment of soils during the design of floor slab on elastic subgrade. Particular attention is given to the behaviour of floor slab areas above pile foundations that support the building’s columns. Calculation results show the impact of subgrade stiffness on the behaviour of the floor slab, especially in areas above pile foundations, where the stiffness of subgrade is much higher. The article presents a solution for achieving the required level of settlements’ differences in areas where pile foundations for the building’s columns under the ground slab are used. The paper proposes an efficient engineering method to reduce ground slab settlements differences. The results of performed calculations confirm the efficiency of presented method.
Highlights
Modern construction industry focuses on the rational design of structural elements and buildings
Numerical calculations were performed according to real situation and is based on the slab calculations for one logistic centre
Different is the stiffness of subgrade that can be found over the pile foundation of the main columns of the building
Summary
Modern construction industry focuses on the rational design of structural elements and buildings. Ground floor slab is a very important complex structural element, especially for industrial buildings and logistics centres where truck lifts are used. Engineering Structures and Technologies, 2020, 12(2): 46–52 for extremely weak soils, the floor slab can be supported on piles (Urbonas et al, 2016). In this case, the settlements of the slab could be greatly reduced and the differences of relatively small settlements would not exceed limit values. The floor slab must satisfy the strength (EN 1992-1-1 (European Committee for Standardization, 1992)) and the flatness tolerance requirements which depend on the type of equipment used. That is why especially for industrial buildings and logistics centres, where truck lifts are used, floor slab flatness tolerance requirements are especially important
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