Abstract

With the aid of photographs· the report shows a range of damaged direct running ceiling slabs in multifunctional buildings· then analyses the cause of the defects and also gives instructions on how these arising defects could have been prevented or significantly reduced through a suitable design of the structure.

Highlights

  • Most newly constructed multifunctional buildings have an underground part designed as a parking garage, where the designed reinforced concrete ceiling structure consists of direct running slabs often protected only by coating against harsh environments and abrasion

  • The numerical analysis was performed for a typical ceiling slab of an underground floor comprising one half of the ground plan of the subterranean part of the building

  • 2.2 Conclusion on the analysis of ceiling slabs: Both the lack of reinforcement slabs and insufficient tending of the concrete contributed to the emergence of cracks, which led to a reduction in the concrete elasticity modulus

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Summary

Introduction

Most newly constructed multifunctional buildings have an underground part designed as a parking garage, where the designed reinforced concrete ceiling structure consists of direct running slabs often protected only by coating against harsh environments and abrasion. Their design is created in terms of II.MS limiting crack width. The smaller one (Fig. 5) represents one typical field of the central part of the slab (in the zone with the substantial occurrence of cracks) It has dimensions of 16.7 x 8.1 m and includes the horizontal ceiling plate, 2 columns and side walls. (if there is no protected surface limit of 0.2 mm, for a protected surface of max. 0.3 mm)

Conclusion on the analysis of ceiling slabs
Model evaluation and conclusions
Sample remediation of defects
Findings
Conclusion
Full Text
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