Articles

Found 7 Documents
Search

PERUBAHAN SISTEM STRUKTUR BANGUNAN RUMAH BUGIS SULAWESI SELATAN Hartawan, H; Suhendro, Bambang
Forum Teknik Vol 36, No 1 (2015)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2094.81 KB)

Abstract

    A structural system determines the strength of the building in order to be able to survive in the long period of time. Functioning as residential house, Bugis houses have been through a long period of time and are supported by the use of specific structural system of the building. This structural system has changed in many ways and forms. This research is aimed at identifying the changes that have occurred in the structural system of old Bugis houses and factors that influence such changes. This research employed descriptive models and typology. Descriptive models were used to reveal the phenomenon of point movement of the structural system aided by SAP 2000 software. Typology was used to classify the types of changes that occurred in the system. The research revealed that the structural system of building of Bugis houses has changed by means of cross and internal system. The system used in the past had lower strength than that used in the next period. The characteristics of the changes in the structural system improved by means of transfer of the use of the construction method from the use of free placement to the use of stiff connection. This change was influenced by three aspects, namely of natural resource aspect, stiffness aspect, and cultural and belief aspects. The natural resource aspect is related to the availability of building materials in terms of quality and quantity. The building of Bugis houses in the past used higher quality materials than the system that developed afterwards. The stiffness is related to the efforts of Bugis technocrats in the past in optimizing the structural system. The results of the analysis indicated that the extent of the horizontal of a point movement is in proportion to the height of point position of the structural system. The higher the location, the greater the movement. The culture and belief are related to the survival for individual and group.Keywords: changes, structural system, Bugis houses
PERFORMANCE BASED DESIGN BANGUNAN GEDUNG UNTUK LEVEL KINERJA OPERASIONAL Ertanto, Boby Culius; Satyarno, Iman; Suhendro, Bambang
INformasi dan Ekspose hasil Riset Teknik SIpil dan Arsitektur Vol 13, No 2 (2017): DESEMBER
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2053.888 KB) | DOI: 10.21831/inersia.v13i2.17182

Abstract

ABSTRACT Indonesia is an area with high earthquake risk, where earthquake-resistant design is required, in critical category IV buildings such as hospitals and educational buildings must be designed to remain operation during and after the earthquake design, without significant damage. owners have the ability to establish and know the performance levels of structures designed with performance-based design methods that impact on development costs, repair costs and reduce casualties due to earthquakes. there are two performance based design methods namely pushover and nonlinear history of time (NLTHA). with ductility values of ? 3 or R 4.8 and Ie 1.5, the structures are designed to have an opertional (O) performance during the earthquake design (DBE) and immediate occupancy (IO) during a maximum earthquake (MCE). using acceptance according to the capacity spectrum method, element acceptance limit and drift according to FEMA 356.Keyword: operational, ductility, performance based design ABSTRAK Indonesia merupakan daerah dengan resiko gempa tinggi, dimana dibutuhkan perencanaan tahan gempa, pada bangunan penting kategori IV  seperti rumah sakit dan gedung pendidikan harus didesain  tetap beroperasi saat dan setelah terjadinya gempa rencana, tanpa mengalami kerusakan yang signifikan. Pemilik memiliki kemampuan untuk menetapkan dan mengetahui level kinerja dari struktur yang didesain dengan metode performance based design yang berdampak pada biaya pembangunan, biaya perbaikan dan mengurangi korban jiwa akibat gempa. Dimana terdapat dua metode performance based design yaitu pushover dan nonlinier riwayat waktu (NLTHA). Dari penggunaan nilai daktilitas sebesar ? 3 atau R 4.8 dan Ie 1.5, struktur yang didesain memiliki kinerja opertional (O) saat terjadinya gempa rencana (DBE) dan immediate occupancy (IO) saat terjadi gempa besar (MCE). Dengan menggunakan penerimaan menurut capacity spectrum method, batas penerimaan elemen dan drift menurut FEMA 356. Kata Kunci: operasional, ductility, performance based design
Analisis Perubahan Tekanan Air Pori pada Tanah Lunak akibat Beban Trial Embankmentdengan menggunakan Plaxis Versi 7.2. Patria, Adhe Noor; Suryolelono, Kabul Basah; Suhendro, Bambang
Dinamika Rekayasa Vol 5, No 1 (2009): Dinamika Rekayasa - Februari 2009
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2009.5.1.16

Abstract

Soft soil could be found easily in Indonesia. Constructions that built on this soil; such as embankment; face some obstructions, for instance long period consolidation, difficult soil compaction, unstable slope of embankment and high settlement value for long period. Consolidation related to particle size of soil grains, soil permeability coefficient and pore size between soil particles. This research was carried out with numerical simulation and aimed to analyze the change in pore water pressures in soft soil due to embankment load.Numerical simulation was carried out by using Plaxis version 7.2. The time periods for construction and consolidation were the same with field measurement values. Total times for both stages were 102 days. Material model used were Mohr Coulomb Model and input material model that were used were the same with filed measurement values.The results showed that at the end of construction stage there always an increasement in pore water pressure (excess pore water pressure existed) and the decreasement of pore water pressure occurred in consolidation period. Excess pore water pressures of soil below embankment were at area A, depth 0,5 was -22,8093 kPa, at area B (depth 9 m) was -21,5576 kPa and at area C (depth 13 m) was -14,159 kPa.
BEHAVIOR OF NAILED-SLAB SYSTEM ON SOFT CLAY DUE TO REPETITIVE LOADINGS BY CONDUCTING FULL SCALE TEST Puri, Anas; Hardiyatmo, Hary Christady; Suhendro, Bambang
Prosiding Forum Studi Transportasi Antar Perguruan Tinggi The 17th FSTPT of International Symposium
Publisher : FSTPT Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Nailed-slab System is not a soil improvement method, but rather as an alternative method to improve the performance of rigid pavement on soft soils. The installed piles under the slab were functioned as slab stiffeners. This research is aimed to learn the behavior of Nailed-slab System under repetitive loadings and its consideration for practical application. The full scale Nailed-slab System was conducted on soft clay which consisted of 6.00 m x 3.54 m slab area with 0.15 m in slab thickness, 15 short micro piles (0.20 m in diameter, 1.50 m in length, and 1.20 m in pile spacing) as slab stiffeners which installed under slab. Piles and slab were connected monolithically, then in due with vertical concrete wall barrier on the two ends of slab. The system was loaded by vertical repetitive loadings. Results show that the installed piles under the slab which embedded into the soils were functioned as slab stiffeners and were able to response similarly in 3D. This system has higher resistance due to vibration. Thereby, the Nailed-slab system is promising for practical application.
PENGARUH PERBEDAAN UKURAN KARET BAN BEKAS TERHADAP SIFAT MEKANIK Nasution, Multilawati; Aminnullah, Akhmad; Suhendro, Bambang
INformasi dan Ekspose hasil Riset Teknik SIpil dan Arsitektur Vol 16, No 1 (2020): MEI
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (646.488 KB) | DOI: 10.21831/inersia.v16i1.31314

Abstract

ABSTRAKBan bekas sulit diurai karena salah satu bahan penyusunnya adalah karet sintetis. Ban bekas digunakan untuk kerajinan tangan, namun besar peluang penggunaan ban bekas sebagai material konstruksi. Kajian ini bertujuan untuk membedakan ukuran karet ban bekas berdasarkan lolos saringan no.#4 (4.8 mm) dan lolos saringan no.#8 (2.3mm). Objek kajian ini adalah kuat tekan dan modulus elastisitas dengan benda uji slinder (&15 cm x 30 cm), kuat lentur dengan benda uji balok (10 cm x 10 cm x 50 cm),  serta kuat tarik dengan benda uji dogbone. Salah satu penyusun mortar adalah karet ban bekas pengganti sebagian dari volume pasir. Kadar karet yang di ambil dari kajian ini adalah 0%, 20%, 40% dan 60%. Kajian ini tidak didapatkan perbedaan yang signifikansi yang besar antara penggunaan karet ban bekas lolos saringan no.#4 (4.8 mm) dan lolos saringan no.#8 (2.3mm).Kata kunci: ban bekas, kuat tarik, kuat tekan, kuat lentur, modulus elastisitasABSTRACTUsed tires are difficult to decompose because one of the constituent materials is synthetic rubber. Used tires are used for handicrafts, but there is a big chance of using used tires as construction materials. This study aims to differentiate the size of used rubber tires based on sieve No. 4 (4.8 mm) and sieve # 8 (2.3mm). The object of this research is compressive strength and modulus of elasticity with slinder test specimens (15 cm x 30 cm), flexural strength with beam test specimens (10 cm x 10 cm x 50 cm), and tensile strength with dogbone specimens. One of the compilers of the mortar is a used tire rubber which partially replaces the volume of sand. The rubber content taken from this study is 0%, 20%, 40% and 60%. There was no significant difference between this study between the use of used rubber tires that passed filter No. #4 (4.8 mm) and passed filter # 8 (2.3 mm).Keywords: used tires, tensile strength, compressive strength, flexural strength, modulus of elasticity
NON-LINEAR ANALYSIS OF HOLLOW REINFORCED CONCRETE COLUMN QUARE CROSS-SECTION WITH VARIOUS LOAD ECCENTRICITY AND CONCRETE STRENGTH Nuryanti, Pingkan; Sulityo, Djoko; Suhendro, Bambang
LANGKAU BETANG: JURNAL ARSITEKTUR Vol 5, No 1 (2018)
Publisher : Department of Architecture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.931 KB) | DOI: 10.26418/lantang.v5i1.24083

Abstract

Hollow due to plumbing system has an effect to the buildings visual and the aesthetic quality in terms of architecture. To overcome this, the pipe is planted in a construction structure such as a column. However, this will affect on the strength degradation and modes of failure of structural elements such as a column. The objective of this research is to study the strength, stiffness, ductility, cracking patterns, and modes of failure of hollow RC columns with square cross-section with various load eccentricity and concrete strength. In this research, 13 reinforced concrete columns with square cross section were made. Two of them were massive columns (C1E1, C1E2) with cross-sectional dimension of 150 x 150 mm2 and 800 mm long, six of them were hollow with the same size (C2E1, C3E1, C4E1, C2E2, C3E2, C4E2). Concrete strength fc=34.52 MPa with eccentricity=60mm  and fc=35.72 MPa with eccentricity 100 mm. Models were analyzed by nonlinear finite element method using ATENA v.2.1.10 software. The FE model is calibrated against recent experimental results from Zacoeb (2003). Once validated, the model is used to examine stiffness, ductility, cracking patterns, and modes of failure of hollow RC columns with a square cross-section with various load eccentricity. The numerical results show that the different ultimate load strength of C1E1, C2E1, C3E1, C4E1, C1E2, C2E2, C3E2, C4E2 are  0,32%, 2,22%, 1,61%, 7,74%, 1,25%, 0,65%, 2,63%, 1,94%, while the differents stiffnes are 18,30%, 21,30%, 23,79%, 31,57%, 15,22%, 22,67%, 21,39%, 14,41%, and the differents ductility are 48,71%, 33,64%, 3,39%, 41,04%, 52,30%, 22,99%, 18,11%, 7,76%. Crack pattern occurred in C1E1, C2E1, C3E1, C4E1, C1E2, C2E2, C3E2, C4E2 are flexural crack and shear cracks. Exhibit modes of failure of C1E1, C2E1, C3E1, C4E1 are compression failure and C1E2, C2E2, C3E2, C4E2 are tension failure.Keywords: ATENA, columns, eccentricity, failure, hollow, nonlinearANALISIS NON-LINEAR KOLOM BETON BERTULANG PENAMPANG SEGIEMPAT BERONGGA DENGAN VARIASI EKSENTRISITAS BEBAN DAN MUTU BETONLubang akibat pemasangan pipa pada konstruksi untuk keperluan instalasi (air hujan, sanitasi, listrik dan lain-lain) dapat berpengaruh pada visualitas bangunan dan akan mempengaruhi kualitas estetika dari segi arsitektur. Untuk mengatasi hal tersebut pipa ditanam didalam struktur konstruksi seperti kolom. Akan tetapi hal ini akan  menyebabkan  degradasi kekuatan beton dan  pola keruntuhan struktur pada kolom. Selain secara eksperimental, penelitian  ini dapat juga dilakukan secara numeris menggunakan  metode elemen hingga nonlinier. Penelitian ini bertujuan untuk mengetahui kekuatan, kekakuan, daktilitas, pola retak dan model keruntuhan kolom beton bertulang penampang persegi berongga dengan variasi eksentrisitas beban dan variasi mutu beton. Dalam penelitian ini dimodelkan 8 jenis kolom beton bertulang penampang segiempat yang terdiri dari 2 kolom masif (C1E1 dan C1E2) dan 6 kolom berongga (C2E1, C3E1, C4E1, C2E2, C3E2, C4E2) dengan ukuran 150 x 150 mm2, panjang 800 mm. Mutu beton fc=34.52 MPa dengan eksentrisitas =60mm dan mtu beton fc=35.72 MPa dengan eksentrisitas =100mm. Kolom dianalisis menggunakan software elemen hingga nonlinier ATENA V.2.1.10 dan hasilnya dibandingkan dengan hasil eksperimen sebelumnya  dari Zacoeb (2003). Setelah  model divalidasi, dilakukan perhitungan kekakuan, daktilitas, pengamatan pola retak dan jenis keruntuhan yang terjadi pada kolom penampang segiempat berongga dengan variasi eksentrisitas beban . Hasil penelitian menunjukkan bahwa kolom beton bertulang  berongga yang dimodelkan dengan ATENA yaitu untuk model kolom validasi C1E1, C2E1, C3E1, C4E1, C1E2, C2E2, C3E2, C4E2 mempunyai perbedaan beban maksimum dengan hasil eksperimen secara berturut-turut sebesar 0,32%, 2,22%, 1,61%, 7,74%, 1,25%, 0,65%, 2,63% dan 1,94%, dengan perbedaan kekakuan secara berturut-turut sebesar 18,30%, 21,30%, 23,79%, 31,57%, 15,22%, 22,67%, 21,39% dan 14,41%, dan perbedaan daktilitas  secara berturut-turut sebesar 48,71%, 33,64%, 3,39%, 41,04%, 52,30%, 22,99%, 18,11% dan 7,76%. Pola retak yang terjadi adalah pola retak lentur dan retak geser.  Pola keruntuhan pada C1E1, C2E1, C3E1, C4E1 merupakan keruntuhan tekan, sedangkan C1E2, C2E2, C3E2, C4E2  merupakan keruntuhan tarik.Kata-Kata kunci: ATENA, berlubang, eksentrisitas, keruntuhan, kolom, nonlinear.REFERENCESCervenka et al. (2007). Superior Material Models for Numerical Simulation of Concrete Cracking under Severe Conditions. Cervenka Consulting. Czech Republic.Public Work Ministry. (2007). SNI 03-2847-2007, Tata Cara Perhitungan Struktur Beton Bertulang untuk Bangunan Gedung. Bandung.Poston et al. (1985). Numerical Models for Non-prismatic Solid Cross-Section Behavior and Rectangular Cross-Section on Biaxially-Bred ColumnsSuprabowo, S. (1996). Analysis of Reinforced Concrete Column Capacity Perforated. Thesis. Department of Civil Engineering, Gadjah Mada University. Yogyakarta.Supriyadi. (1997). The Effect of Holes on Strongly Reinforced Concrete Column Boundaries. Thesis. Graduate Program. Gadjah Mada University. Yogyakarta.Zacoeb. A. (2003). Flexural Capacity of Reinforced Concrete Short Column with Variations Hole, Thesis. Graduate Program. Gadjah Mada University. Yogyakarta.
Bridge Displacement Estimation using Tiltmeter Data Panuntun, Raka Bagus; Aminullah, Akhmad; Suhendro, Bambang; Wardana, Panji Krisna
Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1325.971 KB) | DOI: 10.22146/jcef.43670

Abstract

Structural Health Monitoring System (SHMS) works as an efficient platform for monitoring health condition and and deterioration of civil structures during long-term service periods. One of the sensors is currently applied to Soekarno Bridge is tiltmeter. Vertical displacement data are often required to reflect the overall response of bridge span, however the Soekarno Bridge does not have any displacement sensor. On the other hand, the displacement sensor is very costly compared to tiltmeter. A method is proposed to estimate bridge displacement using data that is collected through tiltmeter. The method is using interpolation and numerical integration to evaluate the displacement. The result shows that the result obtained from the proposed method is reliable with accuracy of displacement around 5 mm. Some recommendations for further implementation of the sensors are provided.