Cahyani, Rizki A. T. (2017) Perilaku Seismik Kolom Beton Bertulangan Ringan. Magister thesis, Universitas Brawijaya.
Abstract
Pengujian eksperimental dilakukan pada kolom beton bertulangan ringan untuk mengetahui perilaku keruntuhan, kapasitas lateral dan kapasitas drift dari kolom tersebut di bawah beban lateral siklik. Delapan spesimen kolom divariasi terhadap rasio tulangan longitudinal, jarak sengkang dan penempatan sambungan lewatan tulangan longitudinal. Penempatan sambungan lewatan tulangan longitudinal yang pendek dan tidak terkekang di daerah kritis menyebabkan kapasitas momen kolom jatuh di bawah kapasitas momen nominal. Sebaliknya, kolom dengan sambungan lewatan non-daktail di luar daerah kritis memiliki kekuatan yang hampir sama dengan kolom tanpa sambungan, namun penggunaan panjang sambungan yang tidak memadai (insufficient) menggeser daerah kritis kolom menjauhi titik momen terbesar di dasar kolom dan berpotensi mengubah mekanisme kegagalan kolom dari flexure critical menjadi flexure-shear critical. Dalam studi ini, semakin minimnya kekangan yang disediakan oleh tulangan transversal tidak mempengaruhi perilaku beban lateral – drift kolom beton bertulangan ringan. Namun, perilaku geser semakin signifikan seiring peningkatan jarak sengkang, ditandai dengan timbulnya pola retak geser diagonal dan meningkatnya konstribusi perpindahan geser terhadap perpindahan lateral total. Secara keseluruhan, hasil pengujian menunjukkan bahwa kolom beton bertulangan ringan dengan detail kekangan yang minim dan atau sambungan lewatan yang tidak memadai mampu mempertahankan kapasitas aksialnya hingga drift yang tinggi meskipun telah kehilangan kapasitas lateral secara signifikan. Sebagai tambahan, model teoritis menyediakan plot beban lateral – perpindahan yang konservatif dan dapat digunakan sebagai acuan dasar desain performa seismik yang didasarkan oleh prinsip perpindahan
English Abstract
Experimental laboratory testing of lightly reinforced columns was conducted to investigate the collapse behaviour, lateral load carrying capacity and drift capacity of such column under cyclic lateral loading. Eight columns with a range of longitudinal reinforcement ratios, rate of confinement and placement of lap splice within or outside critical region were tested. Placing the short, unconfined column's lap splice within critical region caused peak moment to fall short under its nominal moment capacity. In contrast, moment capacity of the specimen containing nonductile lap splice outside critical region was in close agreement with those of specimen without lap splice. However, its inelastic damage region was moving away from the beam-column interface, resulted in degradation of drift capacity and rapid degradation of lateral strength. The presence of non-ductile lap splice outside critical region also potentially shift column's collapse mechanism from flexure to flexure-shear critical. In this study, lack of confinement provided by transverse reinforcement did not affect the behaviour of lateral load - drift of lightly reinforced concrete column. However, greater distance of transverse reinforcement resulted in increase of column shear behaviour, proved by digonal shear cracks and slight increase of shear deformation portion of the total lateral displacement. The experiment result indicates that lightly reinforced column with lack of confinement and insufficient lap splices able to maintain its axial load carrying capacity to large drift ratios despite significant loss of lateral load carrying capacity. In addition, theoretical model provides a reasonable and conservative load – deflection plot, and can be used for initial seismic performance checking using displacement principles.
| Item Type: | Thesis (Magister) |
|---|---|
| Identification Number: | TES/624.183 4/CAH/p/2018/041802277 |
| Uncontrolled Keywords: | REMFORCED CONCRETE CONSTRUCTION - TESTING, COLUMAS, CONCRETE - TESTING, BUIDINGS - CARTHQUAKE EFFECTS |
| Subjects: | 600 Technology (Applied sciences) > 624 Civil engineering > 624.1 Structural engineering and underground construction > 624.18 Materials > 624.183 Masonry, cermic, allied materials > 624.183 4 Concrete |
| Divisions: | S2/S3 > Magister Teknik Sipil, Fakultas Teknik |
| Depositing User: | Nur Cholis |
| Date Deposited: | 02 Jan 2019 07:42 |
| Last Modified: | 21 Oct 2021 02:58 |
| URI: | http://repository.ub.ac.id/id/eprint/162453 |
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