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MEDIA KOMUNIKASI TEKNIK SIPIL

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Published by Universitas Diponegoro

ISSN : 08541809 EISSN : 25496778 DOI : -

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

Media Komunikasi Teknik Sipil (ISSN 0854-1809) published twice in a year, in July and December. The article can be product of researches, scientific thoughts or case study, in civil engineering and isnâ€™t formed by politics, commercialism, and subjectivity unsure. This scientific journal contains articles of thought and research results in Civil Engineering that have never been published in scientific journals or other media.

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Articles 17 Documents

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Search results for , issue "Volume 27, Nomor 2, DESEMBER 2021" : 17 Documents clear

Perilaku Dan Kinerja Struktur Dari Hasil Perancangan Bangunan Unconfined Masonry Dan Confined Masonry Alfien Hernanda Putra; Ade Okvianti Irlan
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Many buildings in Indonesia were damaged during the earthquake, especially non-engineered brick walls building. One example of non-engineered brick walls building is Bendung Village Head Office in Serang, Banten, which was damaged by the 2019 Pandeglang earthquake. This building was built without reinforced concrete beams and columns known as unconfined masonry buildings. In this study, the building will be redesigned with ETABS software to determine the similarities between the structural weaknesses from ETABS and the actual damage. The results of the structural analysis give a time period of 0.814 seconds, a base shear force of 195.5 kN, and a stress on the wall that is 50% similar to the real damage. Then, the same building was designed following the rules and regulations for earthquake resistant buildings in Indonesia so that it became a confined masonry building. The result is a time period of 1.586 seconds, a base shear force of 114.2 kN, and a brick wall that is not damaged when exposed to earthquake loads. However, the dimensions and reinforcement of beams and columns that comply with the minimum requirements for earthquake resistant buildings in Indonesia need to be enlarged because their strength capacity is exceeded by the working load.

Perbandingan Peta Percepatan Tanah di Permukaan sebagai Dasar Perencanaan Tata Ruang Berbasis Mitigasi Bencana di Provinsi Riau Elvis Saputra; Fitri Nugraheni; Widodo Pawirodikromo; Lalu Makrup
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Spatial planning has an important role in disaster mitigation efforts. The availability of earthquake maps is very useful in spatial planning. The need for spatial planning today is micro spatial planning. Therefore, the 2017 national earthquake map needs to be detailed into a micro zonation map at the district or city scale. The ground acceleration presented in the national earthquake map was the acceleration at bedrock, while in spatial planning it is the necessary acceleration at the surface. Therefore, the purpose of this research was to obtain a map of the earthquake at the surface with a micro-scale. Determination of the acceleration value at the surface was carried out by two models. Model-1, the surface acceleration was obtained by multiplying the results of the PSHA analysis at bedrock by the amplification factor based on SNI-1726. While Model-2, the acceleration value at the surface was directly obtained from the results of PSHA analysis using the average surface shear wave velocity (Vs30) based on data from the USGS. The result of this study showed that from the 2 analytical models used, Model-2 has a higher surface acceleration value than Model-1. Riau Province has 12 districts. in general, the 12 districts were included in the low to moderate risk index class, but there was one district that was close to the high index class, namely Rokan Hulu district.

Kajian Parametrik Balok Beton Memadat Mandiri Menggunakan Analisis Nonlinier Elemen Hingga Mahmud Kori Effendi; Novi Rahmayanti; Ilman Fathurahman
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Self-compacting concrete has self-flowing, viscous and compact properties that minimize mechanical compaction. This concrete is suitable for solving the concrete pouring in the narrow and congested reinforcement. Beams made of both self-compacting concrete and normal high-strength concrete are analyzed by MSC Marc / Mentat software. Steel is modeled by being embedded in concrete. The failure criterion of Linear Mohr-Coulomb is used for concrete and Von Mises for reinforcing steel, respectively. Concrete and the plate support are modelled by 3D solid elements. For the steel, the truss element is used. The contact analysis is implemented between beam and both steel plate and steel supports. The load-deflection curve for both concrete are almost the same as the results of the experimental curve. The results of the contact analysis also showed that there were contact and separation in the contact area. The shear retention factor value close to one meaning will restrain greater loads. The results of the study on the reinforcement ratio also showed a reduction of 70% and an increase of 70% when using minimum and maximum reinforcement, respectively. The larger concrete cover also reduces the load that the beams can restrain.

Evaluasi Perilaku Lentur Balok Tinggi LVL Sengon dengan Pengekang Lateral pada kedua Tumpuan Ali Awaludin; Urwatul Wusqo
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Slender beams (beams having a large section height to width ratio ( )) are commonly used in a structure that needs a large bending moment capacity. However, the use of slender beams in a structure is susceptible to overturning and torsion occurrence. Therefore, lateral bracing is usually placed in several points of the beam to prevent lateral-torsional buckling. In this study, a three-point bending test was conducted to evaluate the capacity of 250 mm x 50 mm x 2500 mm Laminated Veneer Lumber (LVL) beams made from Sengon. Two lateral supports were placed at both ends to prevent the beam's lateral displacement. The bending test result shows that the ultimate load of the LVL beam reach 27.88 kN before failure. Furthermore, the LVL beams' bending capacity was calculated using the mechanical properties provided by several previous studies. The LVL beam's capacity was predicted using manual calculation (based on SNI 7973: 2013) and numerical analysis. Numerical analysis was performed using ABAQUS software, and the results were evaluated using the Tsai-Hill and maximum strain failure criterion. The results showed that the maximum strain criterion provides a better prediction of the LVL beam's capacity than Tsai-Hill failure criterion.

Evaluasi Banjir di Kecamatan Bula Kabupaten Seram Bagian Timur Febryhandi Eka Kusuma Putra; Ahmad Zaki Romadhoni; Idham Riyando Moe
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Bula District is strategic region in Seram Bagian Timur Regency which often experienced flood event especially in downstream areas. Flood Event that occurs causing loss of materials, even human life. This research was conducted to identify inundation that caused by the flood using two-dimensional inundation model. Model’s component consists of three part those are hydrology module, flood routing and inland flooding. Flood simulation result was calibrated with flood observation map in Bula District. Flood simulation resulted with flood discharge 25-year times period shows that inundation area that probably happen in Bula District is 5,4 km2 and flood volume that probably happen is 7,406,708 m3. Bila Besar Watershed contribute >70% to flood event that occurs based on inundation area and flood volume. Based on map overlay between simulation result into Satellite Google Imagery shows that 31.8% of 2,390 unit building in Bula District probably inundated by flood.

Potensi Erosi Buluh Akibat Mata Air Pada Bendungan (Studi Kasus : Bendungan Titab) I Putu Hariawan Anggara; Sri Sangkawati Sachro; Thomas Triadi Putranto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

The dam is one of the water infrastructures that can function as conservation, utilization, and control of thedestructive power of water. Titab Dam is one of the dams in Indonesia that has multifunction as irrigationwater, raw water and hydropower. This dam is a type of rock fill dam with an upright core which has a peaklength of 210 m, a width of 12 m, and a height of 78 m from the deepest foundation. This dam was built withrelatively complex geological conditions and landslides occurred on the spillway walls and springs were foundin the landslides so it was necessary to analyze the potential for piping due to the presence of springs. Thisstudy examines the potential for piping due to the influence of springs near the dam. The study was conductedbased on instrument observations during the inundation period from 2016 to 2019. The analysis was carriedout by calculating the acceptance criteria (KP) for seepage and seepage index (Qi) to determine seepagebehavior in the dam body and a safety factor analysis (FK) for piping hazards was carried out by comparingthe hydraulic gradient based on piezometer instrumentation readings and the hydraulic gradient of the dambody core material. Based on the calculation of the seepage acceptance criteria and the seepage index, theseepage that occurs in the Titab Dam is not safe because it exceeds the requirements, the average seepageoccurs is 6.350 > 0.56 liter/minute/m and Qi > 1. However, the analysis of the safety factor of piping hazardis still safe that is equal to 8,390 > 4.

Kajian Kapasitas Kelompok Tiang pada Tanah Lunak Menggunakan Skala Kecil Laboratorium Andry Galardo Naibaho; Aazokhi Waruwu
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2, DESEMBER 2021
Publisher : Department of Civil Engineering, Diponegoro University

Soft clay is one type of subgrade that is problematic in infrastructure development. Pile reinforcement is an alternative to stabilize and increase the bearing capacity of soft clay soils. This study is expected to determine the capacity of the pile group from observations through a small-scale laboratory model and its comparison with the results of the analysis. Reinforcement of the piles used are concrete piles and wooden piles. The research was conducted through model testing on single piles and group piles in soft clay soil. The piles have a length of 20 cm and a diameter of 2 cm with the number of 1, 2, 4, and 9 piles. The study results show that the overall bearing capacity of the observed results is not much different from the results of the analysis. The average bearing capacity of the wooden and concrete piles is 20% and 18% greater than the analysis. The increase in pile capacity for each additional number of piles from the observations is not as high as the analysis. There is a tendency for the soil in the pile group to move down together, so that the capacity value of the pile group on soft clay is smaller than the single pile capacity value multiplied by the number of piles in the pile group.

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