STUDI EKSPERIMEN PERILAKU DINAMIK JEMBATAN PCI GIRDER DENGAN MENGGUNAKAN AKSELEROMETER

Maizuar Maizuar

doi:10.29103/tj.v10i2.353

STUDI EKSPERIMEN PERILAKU DINAMIK JEMBATAN PCI GIRDER DENGAN MENGGUNAKAN AKSELEROMETER

Maizuar Maizuar

Abstract

Abstrak

Jembatan merupakan salah satu sarana infrastruktur transportasi penghubung yang penting. Dalam masa layan kerusakan struktur sebuah jembatan dipengaruhi oleh bermacam faktor beban dan kondisi lingkungan. Struktur jembatan yang sudah menua (ageing bridge) dan kenaikan beban lalu lintas adalah subjek yang harus dimonitor pada pemeliharaan jembatan. Dalam rangka pengukuran kapasitas struktur perlu dilakukan pengawasan rutin dan evaluasi integritas konstruksi sipil dengan menggunakan metode tanpa merusak benda uji (Non Destructive Testing Techniques). Metode ini dapat memberikan informasi tentang respon struktur jembatan. Penelitian ini dilakukan untuk memperoleh data percepatan dengan menggunakan akselerometer yang akan diolah untuk mendapatkan respon struktur berupa frekuensi alami dan lendutan yang terjadi pada tengah bentang jembatan. Selanjutnya dengan menggunakan software Geopsy diperoleh frekuensi alami sebesar 4,3256 Hz. Sedangkan lendutan diperoleh dengan menggunakan software DADiSP sebesar 0,43 cm pada pembebanan truk 28 ton dan lendutan sebesar 0,5 cm pada beban lalu lintas normal.

Kata kunci: Akselerometer, frekuensi alami, jembatan, lendutan, perilaku dinamik

Abstract

Bridges are crucial transport infrastructure. In practice, structural damage of a bridge accumulates over its life-span caused mainly by loadings and environmental condition. Ageing bridge structures subject to increasing demand from heavy traffic loading is subject in monitoring and maintenance of bridges. Structural capacity and integrity of bridges need to be routinely monitored and evaluated using non dectructive testing (NDT) techniques. The NDT method could provide information on structural respond of bridges. This study investigates structural respond of a bridge (e.g., natural frequency and displacement) using accelerometer sensor. The results of study show that the natural frequency obtained using Geopsy software is 4,3256 Hz. Using DADiSP software, the displacement of the bridge is obtained 0,43 cm under design truck load of 28 ton and displacement of 0,5 cm under normal traffic condition.

Keywords: Accelerometer, natural frequency, bridge, displacement, dynamic behaviour

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References

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DOI: http://dx.doi.org/10.29103/tj.v10i2.353