Kajian Geser Interface Antara Beton Lama Dan Baru Dengan Variabel Waktu Dan Variabel Penanganan Interface

In the field of repair and retrofitting of concrete structures, often there is a need to place the new concrete together with the old concrete. Some examples of applications in the field is on the highway structure which need of repairing or widening, and also to repair concrete structures from damage due to loss of quality. This study uses a method of handling the interface by roughning the old concrete surface. In the method of splicing concrete by roughning the old concrete surface, the roughness is divided into two level of roughness, it is low and high roughness. The Classification of low roughness is done by making the texture on the old concrete surface to a depth ± 3 mm and the high roughness is done by making the texture of the old concrete surface to a depth ± 7 mm and were given by the chicken wire. Specimens that used are cubes which dimentions are 15x15x15 cm which is divided into two layers, the old concrete layer size is 10x15x15 cm and the new concrete size is 5x15x15 cm. Both of roughness methods, each of them will be combined with the age of splicing variations between old and new concrete, it is 7, 14, and 28 days. Theoretically, by making higher the level of roughness surface in the old concrete, the shear strength of the interface will be stronger. The longest age of splicing resulted the biggest increasing of shear stress between low roughness and high roughness

Studi Eksperimental Pemberian Tegangan Awal Pada Dinding Batako Tanpa Plester Dan Tanpa Perekat (Btptp) Dalam Menerima Beban

Before the development of the framework structure (using beams and columns), loadbearing wall structure with loads that will work on the building structure bestowed on the walls commonly used in the community. One form loadbearing wall structure is commonly used arrangement brick wall. Adobe is a brick made by printing and maintaining in a damp atmosphere, tras mix, lime and water with or without other additives. One brick technology that has been developed is the use of brick without plaster and adhesives. The composition brick wall has a good ability in resisting axial forces but weak in resisting lateral forces. One of the solutions used to improve the ability of the composition of the brick wall is the lateral force resist giving the initial prestressing force (prestressed) through fastening reinforcement (via tightening bolts). Prediction failure of brick wall composition into focus the problem in this research. Experimental testing in the laboratory, carried out to see the damage that occurs in the form of brick walls in receiving loads (axial and axial-lateral). Abaqus (Simulia 6.10.1) Explicit is used as validation in predicting the form of failure that occurs in the composition of the brick Wall which receives load

Studi Eksperimental Pengaruh Penambahan Abu Sekam Padi Nano Dan Bahan Tambah Superplasticizer Terhadap Kuat Tekan Beton

This research aimed to investigate effect of using nano materials rice husk ash and superplasticizer admixture to concrete compressive strength. Nano rice husk ash used as subtitute of pozzolan portland cement. Production of nano rice husk ash use Planetary Ball Milling with duration of milling for 1 hour. To determine effect of using nano materials rice husk ash dan superplasticizer admixture used variation percentage of materials nano rice husk ash such ash 5%, 10%, and 15% with or without superplasticizer admixture. Tests were conducted at 28 days with uniaxial loading (one-way). Result of this research indicate normal concrete without substitution of nano rice husk ash and without superplasticizer have highest of concrete compressive strength. Concrete with rice husk ash decreased in compressive strength because of rice husk ash absorb much water and increase the length of hydration process of cement in concrete mix. Although there is a decrease through this research is expected, nano techonology in civil engineering can more developed

Studi Eksperimental Pengaruh Konfigurasi Sengkang Pada Daerah Tekan Balok Beton Serat Bertulang

Concrete has relatively high compressive strength, in other hand higher concrete compression give more brittle of failure. There are several methods for improvement such as addition steel-fiber in concrete mix and confinement in the compression zone. This study present a further study on the influence of addition 0.5% steel-fiber of concrete volume to concrete mix and three specimen fiber concrete beams ware evaluated with three stirrup configuration (BF1, BF4, BF5) that concentrated in the compression zone. The study's analyze using a pure beding test with 2 point load of a simply supported beam. The variation of stirrup configuration concentrated at pure beding moment zone of beam. The result of this study, the addition of steel-fibers to the concrete mix increased the cylinder compression strength by 11,96%, The moment capacity of BF4 increased by 0,96% compered to BF1 in other hand the specimen BF5 reduce by 4,1% compered to BF1 ,The Stiffnes of BF4 increased 132,64% and BF5 increased by 25,44% compared to BF1,The Ductility of specimen BF4 increased by 148,01% and BF5 increased by 3.97% compared to BF1

Perencanaan Struktur Gedung @Hom Hotel Kudus Berdasarkan Sni 03-1726-2012

The structure of @HOM Hotel Kudus building design by SNI 03-1726-2012. To obtain ductile structure, special moment resisting frame (SRPMK) used. The analysis of the structure using SAP2000 software. Loading structure refers to SNI 03-1727-2013. Required for earthquake resistant buildings should not happen bristle failure. Thus the plastic hinge detail and beam-column joint must be calculated correctly. Lateral deflection requirements beetween floors should be controlled so that the stiffness of structure is not soft

Perencanaan Struktur Gedung Kuliah Lima Lantai Di Kota Semarang (Dengan Menggunakan Metode Srpmk

The structural of college building planned in Semarang, which the structure of the building is designed by using the Special Moment Resisting Frame System (SMRFS) based on ”Indonesian Concrete Code (SNI 03-2847-2002)”, while the analysis of earthquake load uses response spectrum method based on “Indonesian Seismic Code (SNI 03-1726-2010)”. The design structural of these college building using“Capacity Design” concept. As for using this concept has purpose what if strong earthquake happens, that cause forms plastic hinge on structural elements which is desired appeared on the beams. To guarantee plastic hinge happens on the beams, so the coloumns must be designed stronger than the beams (Strong Column Weak Beam Concept). The analysis of the structure is using SAP2000 computer program version 14. As the result of calculations showed that structural element of building is safe based on analyze