Abstract
Slab without beams cause bending cracks in the tensile region at a low loading level. One way to overcome these weaknesses is to provide a pre-concentric or eccentric initial bias style. In this study, we wanted to compare the performance of prestressed concrete slabs in terms of cross-sectional strength capacity and rigidity of concrete slab without prestressing through experiments. Objects that were tested without prestressing were made 1 piece, namely P1, and objects that were tested with prestressing were 3 piecesnamely P2 with 2 tendons, P3 with 3 tendons, and P4 with 4 tendons. The dimensions of each object tested are 100 × 40 × 8 cm and all of them are designed with concrete qualityf'c = 30 Mpa. The tendon usedis 8 mm plains teel that is pulled by tightening the nuts at both ends, with a parabolic profile shape and eccentricity value in the middle span of 1.5 cm. From the test results obtained a very significant increase in the crosssectional strength capacity of specimens P2, P3 and P4 against P1. The increase in peak load that can be borne by 192.18% is for P2, 286.54% is for P3, and 383.00% is for P4. It also happened to increase the peak bending moment which can be borne by 161.57% for P2, 241.05% for P3, and 322.68% for P4. Keywords: Concrete, Moment . DOI : 10.7176/CER/11-10-05 Publication date: November 30 th 2019
Highlights
The rate of high-rise building construction in Indonesia in the modern era is currently very rapid
1) The presence of prestressed steel in the form of a parabolic profile on a concrete plate has a very significant effect. This can be seen from the P2 specimen capable of carrying peak loads and peak bending moments that are much greater than P1 specimens
Pu.P2 (21208,30 N) >> Pu.P1 (7258,55 N) Mu.total.P2 (2998700,65 Nmm) >> Mu.total.P1 (1146406,46 Nmm) 2) From the three specimens using prestressed steel (P2, P3 and P4), it can be seen that the addition of prestressed steel can increase the capacity of its supporting forces to withstand peak loads and peak bending moments that occur
Summary
The rate of high-rise building construction in Indonesia in the modern era is currently very rapid. One way to overcome these weaknesses is to provide a preliminary concentric or eccentric pre-stressing force on a concrete slab so it can provide an initial compressive stress distribution in the flexural tensile region that can reduce or eliminate tensile stress under all working conditions of gravity loading. Structural elements that are subjected to flexural loads, for example: beams and slabs often experience flexural cracks in the tensile section at low loading levels This is due to the small tensile strength of the concrete so that the fiber tension in the tensile area due to the work load has exceeded the tensile strength limit (condition: Mu>Mcrack) (Lie, 1997). Design control is rarely based on the shear strength of concrete because the shear stress must be limited to a small value to prevent diagonal pull (Collins, 1987)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
