Hardi Wibowo
Departemen Teknik Sipil FT. UNDIP JL. Prof. H. Soedarto SH., Tembalang, Semarang 50275

Published : 32 Documents
Articles

Found 32 Documents
Search

PEMODELAN TIME-DEPENDENT BEHAVIOR MATERIAL DENGAN MENGGUNAKAN ELEMEN SPRING DAN DASHPOT Wibowo, Hardi
TEKNIK Volume 30, Nomor 2, Tahun 2009
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.452 KB) | DOI: 10.14710/teknik.v30i2.1866

Abstract

To model behavior of material, there are two basic models of the material element i.e.: spring and dashpot.In many cases, time-dependent behavior of a material can not enough be used just one or two basic modelof the material element. To model time-dependent behavior of a material, combination of many basicmaterial elements should be used. The most important of long term behaviors of concrete material is creepbehavior. Many equation of creep prediction of the concrete materials have been proposed to manydesign specification and rule design, i.e.: American Concrete Institute (ACI), CEB/FIP 78 and 90, Ba?ant-Panula, Sakata, etc. This paper will be considering and demonstrating how to model creep compliancebased on creep coefficient as used by ACI-209 by using assembly of those basic material element
EVALUASI STABILITAS LERENG YANG TELAH DIPERKUAT PADA JALAN TOL SEMARANG – SOLO SEKSI V UNGARAN BAWEN Khrisna, Rama Harya; Atmanto, Indrastono Dwi; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (903.404 KB)

Abstract

Semarang – Solo toll roads, Ungaran Bawen Section was built to support economic growth in Semarang – Solo and its surroundings. The road across the hills and valleys that contain clay shale. Catastrophic landslide and slope occurs in toll roads at Semarang – Solo STA 19+525. This undergraduate thesis is about the stability of slopes on toll roads, mechanisms and mitigation. The analysis involves conditions which the motions of the soil on the slope because of slope unstability, manual calculation slope stability with Fellenius methods, geotechnical analysis and the use of retaining wall as an alternative method of reinforcement. Geotechnical analysis using Plaxis finite element software. Plastic and elastic model of Mohr-Coulomb failure criterion was chosen as a model soil. Analysis showed that the most optimum avalanche  mitigation is to install a retaining. By using retaining wall combine, minimum slope safety factor be increased and reached 1,541.
PERENCANAAN STRUKTUR GEDUNG MENARA BRI SEMARANG Permatasari, Linda; W., Rahadhiyan Putra; Sabdono, Parang; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 1, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.248 KB)

Abstract

The structural of BRI tower building Semarang is designed in seismic zone of Semarang city, which 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 03-1726-2012). The design structural of BRI tower building Semarang 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 columns 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 BRI tower building is safe based on analyze.
KAJIAN PERAN TULANGAN PADA GESER INTERFACE ANTARA BETON LAMA DAN BARU Devi, Fitrilia Ulfah Karina; Mulyawati, Riana Dwi; Tudjono, Sri; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL volume 1, Nomer 1, tahun 2012
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.772 KB)

Abstract

ABSTRAK Pada pekerjaan perbaikan atau perkuatan struktur dengan melakukan pengecoran beton baru yang melekat pada bidang beton lama akan membentuk semacam lapisan interface beton. Penelitian mengenai bagian interface dilakukan oleh Momayez et al., 2004 dan Hak-Chul Shin et al., 2010. Namun penelitian tersebut belum memasukkan parameter peran tulangan pada interface dalam pengujiannya. Sedangkan penelitian ini mengkaji peran tulangan terhadap kekuatan geser pada interface dan pola retak yang terjadi. Benda uji yang digunakan berbentuk kubus berdimensi 20 cm x 20 cm x 20 cm sebanyak 30 buah yang tersusun dari dua bagian, yaitu beton lama sebesar 2/3 bagian dan beton baru sebesar 1/3 bagian dari kubus benda uji. Variasi beda umur pengecoran terdiri dari 7, 14, dan 28 hari. Variasi bentuk dan diameter tulangan terdiri dari bentuk Tulangan I dan Tulangan U dengan diameter 8 mm dan 10 mm. Dari penelitian disimpulkan bahwa benda uji Tanpa Tulangan mempunyai kapasitas geser paling kecil, sedangkan benda uji dengan Tulangan U memiliki kapasitas geser yang lebih besar dibandingkan dengan Tulangan I. Hal ini dikarenakan penambahan tulangan memberikan pengaruh kekuatan geser yang lebih besar serta Tulangan U bersifat lebih kaku, interlocking dan lekatan antara beton dan tulangan lebih kuat dibandingkan dengan Tulangan I. Kata kunci: interface, kapasitas geser, peran tulangan, pola retak ABSTRACT Alpha In the work of repair or strengthening the structures by casting new concrete inherent in the old concrete surface will form concrete interface. Study on the interface has already been done by Momayez et al., 2004, and Hak-Chul Shin et al., 2010. However, these studies did not include the interface parameters of the influence of steel reinforcement in the test yet. While this study examines the influence of steel reinforcement to the shear strength at the interface and the crack patterns that occur. Specimens used cuboid dimensions 20 cm x 20 cm x 20 cm 30 pieces are composed of two parts, the old concrete for 2/3 parts and new concrete for 1/3 part of the cube specimen. Variations apart in age casting consisting of 7, 14, and 28 days. Variations in the shape and diameter of the steel reinforcement consists of I Reinforcement and U Reinforcement with diameters of 8 mm and 10 mm. From the study concluded that the specimen without steel reinforcement has the smallest shear capacity, whereas specimens with U Reinforcement has a shear capacity greater than I Reinforcement. This is due to the addition of steel reinforcement influence greater shear strength and U Reinforcement is more stiff, interlocking and bonding between concrete and reinforcement stronger than I Reinforcement. Keyword: interface, shear capacity, influence of steel reinforcement, crack pattern
PERENCANAAN ULANG STRUKTUR GEDUNG PRASETIYA MULYA BUSINESS SCHOOL Winanti, Jihan Zahara; Kurniyati R., Hanik; Partono, Windu; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 2, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.122 KB)

Abstract

Design of the building structure was done in order to standing and strong receiving a load on it. Each one of the building structure with another building structure certainly have differences,  the differences include the strength of materials, use of materials, dimensions of the cross section, the calculation of the structure, work stage and so on. This difference is causes the strength of each structure is different, and also differences in cost of structure.Therefore, we would like to know differences of  strength and costs resulting from redesign of the Prasetiya Business School building by eliminating shearwall and open-frame method. Redesign on this structure using the method System Bearer Special Moment.
EVALUASI STRUKTUR DENGAN PUSHOVER ANALYSIS PADA GEDUNG KALIBATA RESIDENCES JAKARTA (The Evaluation Of The Structure by Using Pushover Analysis of Kalibata Residences Building Jakarta) Utomo, Cipto; Susanto, Rokhmad Irfan; Tudjono, Sri; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL volume 1, Nomer 1, tahun 2012
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.98 KB)

Abstract

ABSTRAK Analisis pushover merupakan sebuah sarana untuk memberikan solusi berdasarkan Performance Based Seismic Design yang pada intinya adalah mencari kapasitas struktur. Prosedur analisis pushover dengan memberikan beban statis dalam arah lateral yang ditingkatkan secara bertahap (incremental) hingga mencapai target displacement tertentu atau mencapai keruntuhan. Penulisan ini dilakukan untuk mengetahui perilaku seismik struktur dari besarnya daktilitas aktual dan faktor reduksi gempa aktual. Pola pembebanan lateral yang diberikan pada analisis pushover adalah beban lateral multi-modal, masing-masing gaya dari analisis modal dilakukan respons kombinasi dengan metode SRSS (Square Root of the Sum of Square). Dari hasil analisis pushover didapatkan daktilitas (µΔ) aktual arah x (positif) = 3,85, arah x (negatif) = 3,96 dan daktilitas (µΔ) aktual arah y (positif) = 2,97, arah y (negatif) = 3,15. Faktor reduksi gempa (R) aktual arah x (positif) = 6,2, arah x (negatif) = 6,3 dan faktor reduksi gempa (R) aktual arah y (positif) = 4,7, arah y (negatif) = 5,0. Hal ini menunjukkan bahwa daktilitas (µΔ) aktual dan faktor reduksi gempa (R) aktual yang terjadi sesuai dengan SNI 03-1726-2002 (µm = 4,0 dan Rm = 6,5 untuk sistem ganda yang terdiri dari struktur dinding geser dan SRPMM beton bertulang). Kata kunci : analisis pushover, kurva kapasitas           ABSTRACT Pushover Analysis is a means to provide solutions based on Performanced Based Seismic Design, which in essence is to find the capacity of the structure. Pushover analysis procedure to provide a static load in the lateral directions is increased gradually (incremental) until it reaches the target displacement or achieving certain collapse. In the analysis is performed to determine the seismic behavior of structure and the actual amount of ductility and reduction factor of the actual earthquake. Lateral loading pattern given in the pushover analysis is the burden of multi-modal lateral, each style of respone to the combination of modal analysis performed by the method of SRSS (Square Root of the Sum of Square). The result obtained from pushover The results obtained from pushover analysis ductility (μΔ) the actual direction of x (positive) = 3.85, x direction (negative) = 3.96 and ductility (μΔ) actual y direction (positive) = 2.97, y direction (negative) = 3.15. Seismic reduction factor (R) the actual direction of x (positive) = 6.2, x direction (negative) = 6.3 earthquake and the reduction factor (R) actual y direction (positive) = 4.7, y direction (negative) = 5.0. This shows that the ductility (μΔ) and the actual reduction factor of the earthquake (R) which occurs in accordance with the actual SNI 03-1726-2002 (μm = 4.0 and Rm = 6.5 for the dual system consisting of a shear wall structure and SRPMM reinforced concrete). Keywords : pushover analysis, capacity curve.
EVALUASI STRUKTUR ATAS BOGOR VALLEY APARTEMEN DAN HOTEL Pradhita, Anderika; Putranto, Fajar Wahyu; Sukamta, Sukamta; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 4, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.727 KB)

Abstract

Bogor Valley Apartment and Hotel was built in November 2012.This high rise building consists of 2 towers of apartment and 1 tower of hotel. The apartment reaches 63,7m high with 22 stories and 2 semi basements and the hotel has 10 stories with no semi basement.This upperstructure evaluation of Bogor Valley Apartment and Hotel is based on Indonesian Seismic Code (SNI 03 – 1726 – 2012). Structure is modeled as similar as possible to existing structure. Structural element represents detail section in As Built Drawing. Loading structure in the form of dead load, live load, and seismic load. This structure has irregular shape and high enough stories so therefore using dynamic seismic load analysis is more suitable. Upper structure analysis is using SAP2000v14. As the result of calculations showed that structural element of Bogor Valley Apartment and Hotel building needs to be reviewed deeper because there are some elements that cant pass the requirements based on analyze of Indonesian Concrete Code (SNI 03 – 2847 – 2002).
PERANCANGAN GEDUNG APARTEMEN PALTROW CITY BELLINI TOWER TEMBALANG Irfan, Muhammad; Triatmojo, Bastian; Nuroji, Nuroji; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 4, Nomor 1, Tahun 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.846 KB)

Abstract

Design structure of high story building by SNI 03-1726-2012 on this final report are designed inseismic zoning area of Semarang city usingthe structure frame system method with configuration structure collapsethe System Bearer Special Moment (SRPMK). This system is planned to use the concept of strong column weak beam, where the vertical elements of the structure (column) should be stronger than the horizontal elements of the structure (beam), to be plastically formed jointsfirst on the beam. The analysis of the structure of high story building by SNI 03-1726-2012 using software help SAP2000 v14 with the results of the analysis are used to determine the fundamental period of the structureand the forces acting on the structure. fundamental structural period must be limited so that the structure is not very flexible.
IDEALIZED STRESS-STRAIN RELATIONSHIP IN TENSION OF REINFORCE CONCRETE MEMBER FOR FINITE ELEMENT MODEL BASED ON HANSWILLE’S THEORY Wibowo, Hardi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 12, Nomor 2, Edisi XXIX, JULI 2004
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.058 KB) | DOI: 10.14710/mkts.v12i2.2680

Abstract

Untuk penganalisaan kontrol retak (crack control) pada model struktur beton bertulang (reinforced concrete/RC) menggunakan software finite element seperti DIANA diperlukan pemodelan hubungan tegangan-regangan (stress-strain relationship). Data model hubungan tegangan-regangan ini dalam rangka mengakomodasi efek rekatan (bond-slip effect) antara tulangan (reinforcement) dengan beton (concrete) yang melingkupinya. Hubungan tegangan-regangan yang diperlukan adalah nilai rata-rata tegangan-regangan pada tulangan dan beton. Data hubungan tegangan-regangan rata-rata ini bisa diturunkan dengan menggunakan teori Hanswille. Pada tulisan ini akan diuraikan mengenai teori Hanswille untuk menentukan hubungan tegangan-regangan tersebut dan diberikan satu contoh perhitungan dan curva hubungan tegangan-regangan rata-rata dari sebuah batang beton bertulang.
KAJIAN PERKUATAN STRUKTUR GEDUNG YANG DISESUAIKAN DENGAN SNI GEMPA 03-1726-2012 KOTA SEMARANG STUDI KASUS GEDUNG KULIAH UTAMA FAKULTAS TEKNIK UNIVERSITAS DIPONEGORO Satrio, Bayu Dwi; Pratama, Gema Putra; Tudjono, Sri; Wibowo, Hardi
JURNAL KARYA TEKNIK SIPIL Volume 5, Nomor 1, Tahun 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.711 KB)

Abstract

The Main Lecture Building of Engineering Faculty of Diponegoro University construction process start form June 2010 and be expected to finish at November 2010 but until October 2015 this building can not used as it planned because the construction process have some trouble. Design of this building still use the old guidence that is Earthquake SNI 03-1726-2002. This day that guidence has been updated become Earthquake SNI 03-1726-2012. Because of that this building need to studied so the building can accord with the new guidence. The purpose of this study is to design the structure strengthening so the building can accord with the new guidence. The method of this study is collect the data of laboratory examination. This data will use to determine the quality of materials for calculate nominal capacity. Then redesign the structure using SAP 2000 so that we can know the forces in every element of this structure. Then compere these forces with nominal capacity of the existed structure which is manually calculate under guidence of Concrete SNI 03-1726-2013. If the forces from SAP 2000 analysis bigger than the nominal capacity then the element need strengthening. The reviewed element are beam, column, joint and caisson foundation with strengthening use fiber reinforced polymer under guidence of ACI 440 and concrete jacketing. The result of analysis based on Earthquake SNI 03-1726-2012 show that some element in this building can not hold the forces. Beam can not hold the shear forces. Because of that, beam need the FRP shear strengthening to increase the nominal capacity. Beside beam, column also can hold the forces there are axial and moment. Because of this column need to use the concrete jacketing method to increase the nominal capacity. Concrete jacketing method more efficient than FRP strengthening for column.