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ANALISIS DAYA DUKUNG PONDASI TIANG-RAKIT PADA DAERAH RAWAN GEMPA MENGGUNAKAN METODE POULUS DAN PROGRAM NUMERIS PLAXIS Kusumawardani, Rini; Apriyatno, Henry; Rachmawati, Rizky Julia; Anggraini, Ririn
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 2 (2016): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i2.7835

Abstract: Yogyakarta are situated in the zone with highÂ potential of seismicity. Based on Indonesia map seismicity area, it categorized in a seismic zone 4. Â The secondary effect of this earthquakeÂ phenomena is a soll settlement due to of decreasng of void volume of soil mass. Based on these issues, the foundation system of building is the primary factor which must be considered. This paper revealed the comparation of foundation behavior due to static by using Poulos Method and PLAXS 2D. Pile-raft designed by Poulos method was chosen as a subject of research. Analysis of liquefaction potential, soil settlement, carrying capacity, and the safety factor was analyzed by using CYCLIC 1D, 2D PLAXIS and Methods Poulus. For analysis by the Poulus method reached a soil settelement 4.3 cm and a safety factor 10.76. While by using PLAXIS 2D obtained 0.30 cm and 2,088 for soil settlement and safety factor respectively. Furthermore, a seismic motion of 9.2 scale of Richter mgnitude are injected into analysis resistance of foundation.Â Abstrak: Kota Yogyakarta merupakan wilayah yang memiliki potesi sesismik yang tinggi berdasarkan peta potensi gempa Indonesia. Dalam peta tersebut dikatakan bahawa Kota Yogyakarta terletak pada zona seismik 4. Bahaya sekunder yang terjadi akbat peristiwa gempa adalah adanya penurunan tanah. Berdasarkan permasalahan ini, Â pemilihansistem fondasi pada pada suatu bangunan adalah hal yang terpenting. Pada artikel ini dijelaskan mengenai perbandingan mengenai perilaku fondasi akibat beban statik meggunakan metode Poulos dan Plaxis 2D. Fondasi tiang rakit dianalisa dengan meggunakan metode Poulos dan Plaxis 2D. Analisis megenai potensi likuifaksi, penurunan tanah, daya dukung fondasi dan faktor kemanan struktur dianalisis menggunakan CYCLIC 1D, Plaxis 2D dan Metode Poulus. Untuk analisis menggunakan metode Poulos pada fondasi rakit-tiang diperoleh nilai penurunan 4,3 cm dan faktor keamanan 10,76. Â Untuk analisis menggunakan Plaxis 2D diperoleh penurunan sebesar 0,30 dan angka keamanan pondasi tiang-rakit sebesar 2,088. Selain itu juga dilakukan analisis mengenai ketahanan fondasi ketika menerima beban gempa dengan skala magnitude 9.2 Richter.

KAPASITAS LENTUR BALOK BETON BERTULANG DENGAN POLYPROPYLENE FIBER SEBESAR 6% DARI BERAT SEMEN Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 11, No 2 (2009): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v11i2.1723

The addition of fiber (fiber) in the concrete mixture is to debone the concrete where thefiber is spread evenly into the concrete mixture with random orientation, so as to prevent theoccurrence of micro cracks. The addition of polypropylene fiber is intended to support the internalstresses (axial, bending and shear) is greater. The study aims to determine the flexural capacity ofconcrete beams reinforced with polypropylene fiber at 6% of cement weight. Split tensile strength ofconcrete will increase by approximately 36.78%, while the modulus of elasticity of a decline, adecline of about 5.4% of conventional concrete. Strong increase in the beam line optimally will beobtained when the fiber concrete is placed only partially in the appeal, the proportion of 75% of thetotal look of the block .. Increased flexibility of polypropylene fiber beam 22.6% for the BPF-100,BPF-75, BPF-50, and increased 9.7% for BPF-25 than normal concrete.Ã‚Â Penambahan serat (fiber) pada adukan beton adalah menulangi beton dimana fiberdisebarkan secara merata kedalam adukan beton dengan orientasi acak, sehingga dapatmencegah terjadinya retakan mikro. Penambahan polypropylene fiber dimaksudkan dapatmendukung tegangan-tegangan internal (aksial, lentur dan geser) yang lebih besar. Penelitianbertujuan untuk mengetahui kapasitas lentur balok beton bertulang dengan polypropylene fibersebesar 6% dari berat semen. Kuat tarik belah beton akan meningkat sekitar 36,78 %, sedang nilaimodulus elastisitas terjadi penurunan, penurunan sekitar 5,4 % dari beton konvensional.Peningkatan kuat batas balok secara optimal akan diperoleh bila beton fiber hanya ditempatkansecara parsial pada bagian tarik, proporsi 75 % dari luas tampang balok.. Peningkatan kelenturanbalok polypropylene fiber sebesar 22,6 % untuk BPF-100, BPF-75, BPF-50, dan meningkat 9,7%untuk BPF-25 dibandingkan beton normal.

Analysis Effect of Variation Form and Dimension on Structure Reinforced Concrete Column in Kali Kendeng Bridge Dewantara, Kandida Rahardian; Apriyatno, Henry; Narendra, Alfa; Taveriyanto, Arie
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 1 (2020): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i1.21013

Abstract. Square columns is a rectangular column which has a single stirrup shape and wide distances in - between. In addition, the round column is a column with a spiral section and has a relatively short distance or a relatively smaller distance in - between. Parameters in column planning include reinforcement requirements, column slenderness, buckling factors, interaction diagrams, and ductility. The study used existing rectangular column data with dimensions of 3.5x3.5 m from Kali Kendeng Bridge in the Semarang-Surakarta Toll Road Construction Project. From the field data, variations in the shape of the columns became rounded columns by calculating the moment of inertia of the two cross sections. Variations in dimensions was performed by calculating reinforcement ratio requirements, aiming to produce an effective column design. The first step is to analyze the bridge loading with earthquake loading SNI for the 2833: 2016 bridge and SNI loading for the bridge 1725: 2016. After that, do the calculation of reinforced concrete column requirements and be checked through the SAP2000 application. Then analyze SAP2000 output, so that the moment and shear forces are obtained in square and round columns. Then with the same material that is 30 MPa quality concrete and 390 MPa quality steel, the results obtained slenderness, bending factor and the radius of inertia between square and round columns are the same. The maximum moment value in a square column is 60704.8718 kN-m and the maximum shear is 2358.14 kN. In addition, the round column obtained a maximum moment of 60685.1944 kN-m and a maximum shear of 2358.65 kN. An overview of the relative ductility aspect of 2.7 kN between square and round columns and the ductility value shows the reduced cross-sectional area the smaller the ductility value. Therefore, it is concluded that a round column is better in terms of holding moment and sliding, than a square shaped column.

Defleksi Lateral Tiang Tunggal Akibat Beban Lateral pada Tanah Lempung Berdasarkan Komparasi Tiga Metode Ba'ist, Ahmad Jirjisul; Upomo, Togani Cahyadi; Apriyatno, Henry; Nugroho, Untoro
Jurnal Teknik Sipil Vol 15, No 4 (2020)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

The foundation has a function to hold the load in the form of axial load, lateral load and moment. The axial load on the pile foundation is supported by the pole end resistance and pile friction, while the lateral load on the pile foundation is supported by the relation of the blanket area along the pile with the ground in the lateral direction. Lateral load causes lateral deflection in which the magnitude of deflection must not exceed the permissible lateral deflection limit of 2.54 cm. The determining factors in lateral deflection are the type of pile foundation, soil type, and the magnitude of the force that occurs. The foundation of a single pile in which the number of one pile when embedded in clay soil needs to be investigated for the magnitude of lateral deflection that occurs, this is due to the changing nature of the clay when under the influence of high or low water content. The foundation of the pile uses a concrete head with the condition of a free end with a cylindrical shape with a diameter of 60 cm that is not solid with a wall thickness of 10 cm and a compressive strength of concrete of 60 MPa. Clay soil data uses soil drilling test data in Wirosari, Grobogan, Central Java. The planning method used is the finite element method (PLAXIS) and the finite difference method (p-y curve and the ALLPILE program) with lateral load variations of 10 kN, 15 kN and 20 kN given to the top end of the pole with the principle of giving trial and error loads. The results of the calculation of the lateral deflection of the pile on the p-y curve method with finite difference resolution, the ALLPILE program, and the PLAXIS program respectively with a lateral load of 10 kN are 0.0629 cm; 1.21 cm; 0.27 cm, lateral loads of 15 kN are 0.0943 cm; 2.13 cm; 0.4051 cm, and a lateral load of 20 kN is 0.1258 cm; 3.14 cm; 0.5402 cm. Thus the lateral deflection load limit is 15 kN, so as not to exceed the permissible lateral deflection limit of 2.54 cm. The recommended method used is the ALLPILE program to better get the level of security from the lateral deflection of the pole when applied in the field.

Experiment of Pullout Expansion Anchor in Installation Cast in Place and Post Installed with Concrete Breakout Failure Huda, Amirul; Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 23, No 1 (2021): Jurnal Teknik Sipil dan Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v23i1.26246

Abstract: The use of anchors in construction is gaining popularity to connect steel and concrete constructions, and to transmit tensile loads acting onto the concrete. This research aims to find out the difference in the strength of anchor based on two methods of installations that are cast in place compared to post installed with the influence of effective depth, diameter of anchor and quality of concrete, and failure of concrete breakout. Expansion anchor used in this study is "Sanko" M12x100 and ready-mix concrete PT Bonindo Ungaran, fc 25 MPa with 6 pieces of test specimens of 300x300x150 mm. Each specimen has 4 anchors with a distance between the anchors of 100 cm, the distance between the anchors to the edge of the concrete 100 mm, and the depth of installation (hef) of 60 mm. The result of the study is the predicted value of the anchor pullout capacity with the failure of concrete breakout due to the theoretical pullout, namely 42,223 N, anchor pullout test results with cast in place method of 40,574 N and post installed method by 37,494 N. Tensile strength tests (material) of anchor (fy) 338 MPa, for flat concrete compressive strength strength of (fÃ¢â‚¬â„¢c) 25,698 MPa. The results of the cast in place pullout test are larger and better than post installed (40574 N>37494 N). Failure that occurred in cast in place method is a failure of concrete breakout and post installed method has occurred slip. Failures that occur are relevant to the theory.

Experimental Study of Pull-Out Failure on Sanko Hammer Drive Anchor Using Cast in Place and Post-Installed Methods on Ready-mix Concrete with Quality of 25 Mpa Apriyatno, Henry; Supriyono, Supriyono; Taveriyanto, Arie
Jurnal Teknik Sipil dan Perencanaan Vol 23, No 1 (2021): Jurnal Teknik Sipil dan Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v23i1.28027

Abstract: Anchor serves to connect steel and concrete construction that can transfer steel pull-out load to concrete. Sanko hammer drive anchor usually has been available in the model of expansion that can be installed into concrete with cast in place and post installed methods. The experiment was aimed at comparing pull out failures of Sanko hammer drive expansion anchor using cast in place and post installed installation methods based on pull-out failure behavior. Experimental data were obtained from the pull-out strength test of Sanko hammer drive expansion anchor, compressive strength test and ready-mix concrete split tensile test, adhesion strength test and group anchor pull-out test which consists of four units of anchor with diameter of 10 mm planted 90 mm depth on T concrete beams with dimension of 300 mm x 300 mm x 150 mm as many as three beams for each of them using cast in place and post installed installation methods. The results of the experiment showed that concrete compressive tension value (fÃ¢â‚¬â„¢c) is 25.69 MPa, anchor tension value (fu) is 383.25 MPa, anchor adhesion tension value (ÃŽÂ¼) with cast in place method is 2.25 MPa and post installed method is 1.56 MPa. Theoretically, the damage occurred in pull-out condition; while in the experiment, the test showed a difference in pull-out capacity using cast in place installation method of 38.38 kN with deformation of 13.81 mm, which is higher than theoretical value of 26,083 kN and using post installed method of 36.62 kN with deformation of 8.89 mm, which is higher than theoretical value of 18,084 kN and the experiment indicates that the anchor is perfectly pull-out.

KAPASITAS GESER BALOK BETON BERTULANG DENGAN OLYPROPYLENE FIBER SEBESAR 4% DARI VOLUME BETON Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 12, No 2 (2010): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v12i2.1349

Abstract:Â PolypropyleneÂ fiberÂ isÂ oneÂ ofÂ theÂ plasticÂ fiberÂ thatÂ hasÂ highÂ tensileÂ strength,Â easily available, relatively cheap, resistant to chemical attack, and has a dry surface so that no clumping of fiber in the concrete mixing process.The study aims to determine the effect of polypropylene fiber by 4% ofÂ the volume of concreteÂ to shear strength ofÂ reinforced concrete beams. The addition of polypropyleneÂ fiberÂ inÂ theÂ levelsÂ ofÂ 0%Â toÂ 4%Â ofÂ theÂ volumeÂ ofÂ concreteÂ causesÂ aÂ decreaseÂ in modulus of elasticity of 13966.33 MPa to 11,709 MPa. Shear test results reinforced concrete beam fiberÂ contentÂ increaseÂ fromÂ 0%Â to 4%Â increaseÂ inÂ capacityÂ obtainedÂ byÂ theÂ nominalÂ shearÂ beam from 4.08 tons to 4.56 tons. Fiber concrete beams will increase the shear capacity of 11.76% of the normal beam shear capacity. Keywords: polypropylene fiber, modulus elasticity, shear capacity Â Abstrak:Â Â PolypropyleneÂ fiber merupakan salah satu serat plastik yang memiliki kuatÂ tarikÂ tinggi, mudahÂ didapat,Â harganyaÂ Â Â relatifÂ murah,Â tahanÂ terhadapÂ seranganÂ bahanÂ kimia,Â danÂ memiliki permukaanÂ yangÂ keringÂ sehinggaÂ tidakÂ terjadiÂ penggumpalanÂ seratÂ dalamÂ prosesÂ pengadukan beton. PenelitianÂ bertujuan untuk mengetahui pengaruh penambahan polypropylene fiber sebesar 4% dari volum beton terhadap kuat geser balok beton bertulang. Penambahan polypropylene fiber dari kadar 0% sampai 4% dari volume beton menyebabkan penurunan nilai modulus elastisitas dari 13.966,33 MPa menjadiÂ 11.709 MPa. HasilÂ pengujianÂ geserÂ balokÂ betonÂ bertulangÂ penambahan kadar serat dari 0%Â sampai 4% diperolehÂ kenaikanÂ kapasitas geser nominal balok dari 4,08Â ton menjadi 4,56Â ton.Â Â Balok betonÂ fiber akan mengalami kenaikan kapasitas gesernya sebesar 11,76 % dari kapasitas geser balok normal. Â Kata kunci: polypropylene fiber, modulus elastis, kapasitas geser

Analysis of Strengths of Reinforced Concrete Beam Structures with CFRP Sheet Using Abaqus Software 6.14 Yasir, Ahmad; Effendi, Mahmud Kori; Taveriyanto, Arie; Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 1 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i1.19364

Abstract. Concrete beams are parts of a structure that serves as a channeling moment to the column structure. The structure of the beam which has undergone yielding reinforcement must be repaired. One of the beam repairs that can be done is by providing reinforcement using Carbon Fiber Reinforced Polymer (CFRP) sheets. The reinforcement structure modeling and analysis were carried out using the Abaqus software. There are two types of modeling, those were laboratory test beam modeled with Abaqus (BPA) and reinforced beam using CFRP (BPC). The beam structure analysis using Abaqus software showed that BPA beam experiences a first crack when the load is 5311.96 lbs with a 0.08 inch displacement, while the BPC-2 beam is first cracked at a load of 5019.93 lbs with a 0.10 inch displacement. The BPA beam experiences an ultimate when the load was 12620.84 lbs with a 0.64-inch displacement, while the BPC-2 beam experiences ultimate when the load was 12403.48 lbs with a displacement of 0.60 inch. The type of crack pattern in both beam models is the type of bending crack.

Experiment of Pullout Expansion Anchor in Installation Cast in Place and Post Installed with Concrete Breakout Failure Huda, Amirul; Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 23, No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v23i1.26246

Abstract: The use of anchors in construction is gaining popularity to connect steel and concrete constructions, and to transmit tensile loads acting onto the concrete. This research aims to find out the difference in the strength of anchor based on two methods of installations that are cast in place compared to post installed with the influence of effective depth, diameter of anchor and quality of concrete, and failure of concrete breakout. Expansion anchor used in this study is "Sanko" M12x100 and ready-mix concrete PT Bonindo Ungaran, fc 25 MPa with 6 pieces of test specimens of 300x300x150 mm. Each specimen has 4 anchors with a distance between the anchors of 100 cm, the distance between the anchors to the edge of the concrete 100 mm, and the depth of installation (hef) of 60 mm. The result of the study is the predicted value of the anchor pullout capacity with the failure of concrete breakout due to the theoretical pullout, namely 42,223 N, anchor pullout test results with cast in place method of 40,574 N and post installed method by 37,494 N. Tensile strength tests (material) of anchor (fy) 338 MPa, for flat concrete compressive strength strength of (fâ€™c) 25,698 MPa. The results of the cast in place pullout test are larger and better than post installed (40574 N37494 N). Failure that occurred in cast in place method is a failure of concrete breakout and post installed method has occurred slip. Failures that occur are relevant to the theory.

Lateral Deflection of Single Pile due to Lateral Loads in Clay Soils based on The P-Y Curve Method with Finite Difference Solution, ALLPILE Program, and PLAXIS Program Ba'ist, Ahmad Jirjisul; Upomo, Togani Cahyadi; Apriyatno, Henry; Nugroho, Untoro
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i2.20961

The foundation has a function to hold the load in the form of axial load, lateral load and moment. The axial load on the pile foundation is supported by the pole end resistance and pile friction, while the lateral load on the pile foundation is supported by the relation of the blanket area along with the pile with the ground in the lateral direction. Lateral load causes lateral deflection in which the magnitude of deflection must not exceed the permissible lateral deflection limit of 2.54 cm. The determining factors in lateral deflection are the type of pile foundation, soil type, and the magnitude of the force that occurs. The foundation of a single pile in which the number of one pile, when embedded in clay soil, needs to be investigated for the magnitude of lateral deflection that occurs, this is due to the changing nature of the clay when under the influence of high or low water content. The foundation of the pile uses a concrete head with a condition of a free end with a cylindrical shape with a diameter of 60 cm that is not solid with a wall thickness of 10 cm and a compressive strength of concrete of 60 MPa. Clay soil data uses soil drilling test data in Wirosari, Grobogan, Central Java. The planning method used is the finite element method (PLAXIS program) and the finite difference method (py curve and the ALLPILE program) with lateral load variations of 10 kN, 15 kN and 20 kN given to the top end of the pole with the principle of giving trial and error loads. The results of the calculation of the lateral deflection of the pile on the py curve method with a finite-difference resolution, the ALLPILE program, and the PLAXIS program respectively with a lateral load of 10 kN are 0.0629 cm; 1.21 cm; 0.27 cm, lateral loads of 15 kN are 0.0943 cm; 2.13 cm; 0.4051 cm, and a lateral load of 20 kN is 0.1258 cm; 3.14 cm; 0.5402 cm. Thus the lateral deflection load limit is 15 kN, so as not to exceed the permissible lateral deflection limit of 2.54 cm. The recommended method used is the ALLPILE program to better get the level of security from the lateral deflection of the pole when applied in the field

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