Gaya tarik transversal pada balok ujung beton pratekan

Linggawan, Linggawan (2011) Gaya tarik transversal pada balok ujung beton pratekan. Masters thesis, Universitas Tarumanagara.

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Abstract

Prestressed concrete in post-tension method, the prestressing force at anchorage zone creates high local compressive stresses and followed by high transversal tensile stresses which can exceed the modulus of rupture of concrete. Modes of failure causes by these stresses are brittle, explosive and must be designed properly. In the series 1 experiment, transversal steel reinforcement were spreaded uniformly over global zone without confining reinforcement on the specimens with ratio of cross-sectional high (h) and anchor plate dimension (a) h/a = 1.65 – 3.30. The results show that cracking force (Pcr) cause by the prestressing force always below the factored prestressing force (Psu) presented by American Concrete Institute (ACI) 318M-08, although the maximum prestressing force (Pmax) occured might be higher than Psu. In the series 2 experiment, the local zone is strengthened by confining the concrete with square reinforcement and spiral reinforcement separately. The results show that Pmax obtained by spiral confining reinforcement are higher than Pmax obtained by square confining reinforcement. The series 3 experiment were continued with square speciments. Dimension of square confining reinforement and spiral confining reinforcement were made with some variation separately. It shows that Pmax decreases with the increase of square confining area. In contrary, Pmax increases with the increase of spiral confining area. The results of these experiment can be concluded: First, design of global zone for transversal tensile force is limited by the cracking of concrete with the design strength of transversal steel reinforcement fs = 200 Mpa or strain of the transversal steel reinforcement is limited to 0.1% (IS:1343). Second, design of local zone with spiral confining reinforcement is more efficient and more effective than square confining reinforcement

Item Type: Thesis (Masters)
Subjects: Tesis
Tesis > Pascasarjana
Divisions: Fakultas Teknik > Teknik Sipil
Depositing User: Puskom untar untar
Date Deposited: 30 May 2017 02:52
Last Modified: 22 Jun 2021 17:01
URI: http://repository.untar.ac.id/id/eprint/1117

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