Nopriadi, Nopriadi
(2021)
Analisis Lendutan Dan Momen Pelat Model Perkerasan Sistem Cakar Ayam Modifikasi Pada Tanah Gambut Menggunakan Metode Beams On Elastic Foundation.
Other thesis, Universitas Islam Riau.
Abstract
The Modified Cakar Ayam (CAM) system is a further development of the Prof. Sediyatmo Cakar Ayam (CA) system. In practice, this system performs on-site casting, resulting in a dirty work and difficulties in working the reinforcement. Hamdan (2019) has tested a laboratory model of the CAM System using a lean concrete on peat soil with a scale of 1:10. The test was aimed to determine the effect of the thickness of the lean concrete on the CAM system with centric and eccentric loadings. The results showed that the lean concrete can reduce the slab deflection that occurs in the CAM pavement system model. In this study, an analysis was carried out to determine the deflection and moment of the slab of the CAM pavement system model. The slab analysis of the CAM pavement system model used the Beams on Elastic Foundation (BoEF) method by using the “BoEF.xls” version 1.6 program. This program requires an equivalent subgrade reaction modulus (k') which takes into account the subgrade reaction modulus (k) and the addition of the subgrade reaction modulus due to the presence of pile/claw (∆k). The calculation of ∆k was done by several methods, namely the Hardiyatmo method, the Hardiyatmo Modification method and based on the Puri’s Graph. The data used refers to previous researcher (Hamdan, 2019). Deflection and moment analysis with the BoEF program was carried out with loading in the middle (A) and at the edges (B) of the slab, using variations of the lean concrete, namely without a lean concrete (0 cm) and with a lean concrete of 1,5 cm. In addition to the variation of the lean concrete, an analysis was also carried out by taking into account the influence of the end bearing resistance of the pile/claw (Qb). The results of the analysis show that the largest deflection occurs at the load point, the effect of the load decreases as it moves away from the load point. Due to the edge load (B), the unloaded end of the plate is reversed. The pile end bearing resistance (Qb) has no significant effect on the calculated deflection on the CAM pavement system model slab, this is indicated by a small deflection difference when Qb = 0 and Qb > 0. Lean concrete can reduce the calculated deflection, the average ability of 1,5 cm lean concrete to reduce deflection is about 12,71% at load A and 8,34% at load B. Variations of k', lean concrete and Qb have no significant effect on calculated moment on the CAM pavement system model using the BoEF program, it can be seen that the moment value is relatively the same and increases with increasing load.
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