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INDONESIA
Inersia : Jurnal Teknik Sipil dan Arsitektur
Published by Universitas Negeri Yogyakarta
ISSN : 0216762X     EISSN : 2528388X     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
INERSIA is stand for INformasi dan Ekspose hasil Riset Teknik SIpil dan Arsitektur. This scientific journal is managed by the Department of Civil Engineering and Planning Education, Faculty of Engineering, Yogyakarta State University, in cooperation with the Persatuan Insinyur Indonesia (PII). It publishes and disseminates research results from lecturers and post graduate students from various universities in Indonesia, which has contributed to the development of science and technology, especially in the field of Civil Engineering and Architecture. INERSIA is published twice a year, in May and December.
Arjuna Subject : -
Articles 14 Documents
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Search results for , issue "Vol. 20 No. 2 (2024): December" : 14 Documents clear
Electrical Resistivity Tomography as a Geotechnical Justification Support (Case Study Makassar – Pare-Pare Railway Bed Construction KM 68+450 to KM 68+750) Sasmayaputra, Nur Alfian; Wibowo, Dian Eksana; Fajarwati, Yuli; Endaryanta, Endaryanta; Aswad, Sabrianto; Widiastuti, Nur Oktaviani
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.77380

Abstract

This study examined the presence of underground water channels under the Makassar - Pare-pare railway line KM 68+450 – KM 68+750 and the design concept for the technical solution. The potential for underground water channels was identified during construction, based on community information, the location's morphological phenomena, and  geological conditions whose base rock was the limestone formation. The problems can cause instability of the railway line, resulting in unsafe train travel. One of the characteristics of limestone rock conditions is its hollow shape, like a cave that can become underground water flow. It was a case study whose solution was based on data obtained from geotechnical investigations. Boring testing can only provide information on soil layers at the test point and cannot describe soil stratigraphy section, including underground water channel.  Combination  ERT and Boring tests were carried out to examine the presence of underground water channels. This study was conducted in three stages: initial identification, advanced identification, and design concept of Technical Solution. In these three stages, data collection and analysis were carried out. The results of the study indicated that ERT tests could provide a picture of the subsurface to shallow bedrock, thus facilitating the justification of geotechnical design. From the analysis, it was concluded that no channel cavities, such as caves, that function as underground water channels. The existing water flow was estimated to be a confining aquifer where water flows due to the height difference in the surrounding morphological conditions through the media of the broken limestone water shaft. It was confirmed with the results of Boring and ERT tests. The proposed technical solution concept was strengthening the Dolken embankment structure and geogrid, combined with a subdrain layer. The technical solution was prepared based on the results of research on construction contract data and project resource readiness.
The Acculturation of Building Facade Characters in Loji Wetan Area, Surakarta Putri, Dewi Widowati; Widyastuti, Dyah Titisari
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.72441

Abstract

Loji Wetan is a former European ethnic residential area to the east of Vastenburg fort, Surakarta. This area has the characteristics of European building. However, the visual are gradually fading due to changes in facade form. The research identified the character of 22 residential buildings based on variables and indicators regarding facade components which discuss roof components, columns, doors, windows, guardrails, porches or verandas, and stairs, as well as architectural facade composition which discusses symmetry, geometry, proportion and scale, rhythm, and contrast. The research show that the characteristics at Loji Wetan are a product of acculturation between colonial, Javanese and Chinese architecture. Colonial elements presented with clipped gable roofs, supporting column structures, size of the doors and window, as well as the presence of a 2-story building. Javanese influence the presence of carved ornaments above lintels, wooden lattice window models, wooden columns, and the symmetry of the faí§ade which represent the Javanese philosophy of balance. Meanwhile, the Chinese style is shown through the column-free facade that squeezes into the street.  This product of acculturation influenced by several factors, including socio-cultural, political, and economic factors.
Spatial Patterns of Nomad Tourism in Canggu Village Bali Utama, Christian Petra; Nuryanti, Wiendu
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.73224

Abstract

Nomadic Tourism has emerged as a new trend after the Covid-19 pandemic. This tourism style involves travellers moving around and staying for certain periods in destinations that offer easily movable amenities. Canggu Village in Bali has become one of the world's most popular destinations for nomadic tourists, ranking eighth based on reviews from the nomad tourist community. In Canggu Village, nomadic tourists form spatial patterns influenced by their behaviour, types of travel, and travel patterns. This research aims to identify the behaviour of nomadic tourists in Canggu Village, Bali, and to describe the spatial patterns of Nomadic Tourism in the area. The research employs a descriptive qualitative approach, utilising methods such as observation, interviews, and documentation. The findings reveal insights into the behaviour of nomadic tourists and provide a detailed description of the spatial patterns of Nomadic Tourism in Canggu Village, Bali.
Analysis of the Comparison Between Residents' Perception and Field Measurement of Visual and Thermal Comfort (Case Study: Student Dormitory Building) Yulianto, Dwi; Irawati, Inggar Septhia; Nugroho, Arief Setiawan Budi
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.77370

Abstract

As public buildings, student dormitories must be comfortable as they host most of the students' lives and activities. A space's visual and thermal comfort significantly impacts the occupants' activities and productivity. Indicators for assessing the building comfort level include visual, thermal, and noise comfort in spaces or buildings. This paper presents the results study of the building's visual and thermal comfort measurement and the occupants' perception toward comfort. This paper also presents the comparison between that measurement and the occupants' perceptions. This research employs a mixed-methods approach consisting of qualitative methods (occupants' perception questionnaire) and quantitative methods (field measurements of lighting levels, air temperature, and humidity). Data were collected through questionnaires distributed to dormitory residents and field measurements using an Environmental Meter 4 in 1 to measure natural and artificial lighting levels, air temperature, and humidity. The data obtained were analyzed and then presented in a descriptive format. Based on residents' perceptions, the findings indicate that the overall visual and thermal comfort in the dormitory building falls within a good category. The field measurements on natural lighting, air temperature, and humidity show that the student dormitory building meets the established comfort standards. However, the artificial lighting of staircases and corridors doesn't meet the standards due to many non-functioning lights and low lumen levels. Overall, the lighting, temperature, and humidity conditions in the dormitory building are influenced by building design, orientation, surrounding environment, and occupants' behavior. To enhance comfort and health for residents, improvements in artificial lighting systems, enhancement of natural ventilation, and education on the importance of good air circulation are necessary.
Analysis of Peak Ground Acceleration (PGA) and Modified Mercalli Intensity (MMI) Scale using PSHA Method in Lampung Province Yahya, Muhammad Harun; Ashari, Almaida Enggar; Syahbana, Arifan Jaya; Kuntjoro, Yanif Dwi; Luthfin, Ahmad
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.73063

Abstract

Earthquakes are inevitable natural disasters that are challenging to predict, yet effective mitigation is crucial. Lampung Province, located in Indonesia, faces significant tectonic activity due to the Sumatra Fault System (SFS) and the subduction of the Indo-Australian and Eurasian plates. Its strategic location as the gateway to Sumatra Island further underscores the importance of understanding earthquake hazards in the region. This study analyzes earthquake risks in Lampung Province using a micro-scale approach that integrates Peak Ground Acceleration (PGA) and Modified Mercalli Intensity (MMI) values through the PSHA method. The PSHA method identifies earthquake microzonations and generates PGA values that are then converted to the MMI scale to determine the intensity of earthquake strength. The mapping of Lampung Province identified five zones with different levels of earthquake hazard, ranging from VII to XI MMI with varying PGA values. The first zone, on the VII MMI scale, has a PGA ranging from 0.20 to 0.25g. The second zone, in the VIII MMI scale category with PGA ranging from 0.20 to 0.40g. The third zone, falls within the IX MMI scale category with PGA ranging from 0.40 to 0.70 g. The fourth zone is categorized as X MMI scale with PGA values ranging from 0.70 to 1.00g. The fifth zone, has a scale of XI MMI with a range of PGA values between 1.00 and 2.50 g. Areas with higher PGA and MMI scales indicate a greater potential for severe damage, highlighting the need for targeted mitigation strategies in high-risk zones. These findings provide a foundation for disaster preparedness and urban planning in Lampung Province.
Effect of Sand Sphericity and Cement-to-sand Ratio on Effective Porosity and Permeability of Concrete Sand Filter Pradana, Gregorius Signer; Kamulyan, Budi; Supraba, Intan
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.76088

Abstract

Sand filter is a widely used water treatment technology due to its operational simplicity. The drawbacks of sand filter operation are long backwash times and particle stratification, leading to high energy and sand replacement costs. The concrete sand filter (CSF) was created by mixing sand with cement paste as a binding agent. CSF establishes its water production capacity based on its effective porosity and permeability, which are influenced by the shape of the sand. CSF may have more spherical particles because the cement paste covers the sand. Previous studies have investigated the influence of the shape and size of aggregates on the porosity and permeability of pervious concrete. This study investigates the effective porosity and permeability of CSF using various sand shapes and cement-to-sand (c:s) ratios, as well as changes in the shape of the sand grains used to build the CSF due to mixing with cement paste. The sand types are characterized by their circle ratio sphericity; the c:s ratios tested are 0, 1:6.4, and 1:8.6. All specimens are 10.9 cm in diameter and 20 cm in height. The water displacement method was employed to measure the effective porosity, while the constant head method was used to determine the permeability. The results indicate that when the circle ratio sphericity of the sand used to build the filter increases, the effective porosity and permeability of filters decrease for all values of c:s. Specimens with high cement content have lower effective porosity and permeability and show a strong linear relationship (R² = 0.9555 at c:s = 1:6.4).
Bridge Maintenance Strategy: Application of Bridge Condition Index (BCI) UK to Ngawi Kertasono Toll Road Bridge Sari, Halima Irianti Puspita; Siswosukarto, Suprapto; Aminullah, Akhmad
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.70211

Abstract

In the context of toll road infrastructure, bridges are essential for connecting two distinct sections and ensure the toll road functioning properly. Therefore, to accomplish that objective and, at the same time, optimize the allocation of limited funds for maintenance, bridges require a proper maintenance priority strategy. However, in Indonesia's Bridge Management System (BMS), the importance weight of the bridge elements has not yet been used and the final result still causes bias while assembling the rankings of handling priorities. The Bridge Condition Index (BCI), developed in the United Kingdom, offers a bridge handling priority system that is determined by the importance of each bridge element. To determine the effectiveness of the BCI UK method, an analysis was carried out using the results of a visual inspection of five river bridges located on the Ngawi Kertasono toll road. According to the handling ranking result, Kedungrejo Bridge appears to be on the first rank with the dominant defect occurred on the pier element. Sukoharjo Bridge, on the other hand, has the dominant defect happened in the carriageway surfacing and is ranked last. The outcomes itself indicate that bridges with defects in critical elements, which can affect the structural stability of the bridge, will be prioritized to be repaired prior to bridges with non-structural element damages. Moreover, suitable repair recommendations can be made based on the type and severity of the damage itself. Furthermore, this result is expected to be taken into account while developing the Indonesian bridge management system in the future.
Mix Design of Ambient Cured Geopolymer Concrete with Fly Ash, GGBFS, and Borax Hanani, Eklisia; Satyarno, Iman; Sulistyo, Djoko
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.74464

Abstract

Geopolymer cement, using fly ash (FA), presents a viable alternative to Portland cement. However, FA-based geopolymers often lack reactivity and strength, necessitating combination with calcium-rich materials like ground granulated blast furnace slag (GGBFS). However, GGBFS could accelerate setting and decrease workability, requiring a retarder. Borax is recognized for its retarding properties in FA-based geopolymers, but its impact in FA-GGBFS systems remains understudied. This study evaluated the influence of varying proportions of FA and GGBFS with the addition of borax, on the setting time, workability, and mechanical strength of the geopolymer paste, mortar, and concrete under ambient curing conditions. Setting time test was conducted for the geopolymer paste, flow table test for workability assessment of mortar, and compressive strength testing at 1, 7, and 28 days for the mechanical strength of paste and concrete. Various FA:GGBFS ratios (100:0, 70:30, 50:50, and 0:100) were examined. Alkali activator consists of NaOH and Na2SO3 with Na2SO3/NaOH ratio (R) of 1.5 and alkali to precursors ratio (A) of 0.45 was used. Borax was added at a constant 3% by weight of the precursors. Both the volume ratios of paste to fine aggregate voids (Rm) and mortar to coarse aggregate voids (Rb) were set to 1.5. Borax increased initial setting time by 7-33 minutes for FA-GGBFS geopolymer. GGBFS replacement decreased the workability of mortar, with flow index ranging from 83-158%. Increasing GGBFS content significantly improved compressive strength in both paste and concrete samples. Notably, 100% GGBFS replacement yielded the highest concrete strength at 74.86 MPa after 28 days. However, the optimal balance of properties was achieved with a 50% GGBFS replacement, resulting in satisfactory strengths of 100.29 MPa for paste and 69.08 MPa for concrete, along with a 40-minute initial setting time and a flow index of 138%. These findings surpass prior studies on similar geopolymers.
Effects of Gap on Erosion Surrounding Culvert Joints - An Experimental Study Kuswari, Sari; Hardiyatmo, Hary Christady; Fathani, Teuku Faisal
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.72119

Abstract

Culvert is one of the drainage systems designed to transport water from one place to another place. Soil erosion can occur due to gaps in the joints of culverts, leading to phenomena such as piping, backward erosion, and suffusion caused by water discharge. When water flows through a gap culvert joint, it makes the soil around it fluid, which can result in sand boiling, and eventually, the formation of sinkholes. Water entrains soil particles, reducing soil density around the culvert, forming voids that expand with erosion. A laboratory-based study investigated gaps in culvert joints, and found that water flow velocity and duration significantly influence soil erosion. Water flow transports eroded materials into culverts, with most soil particles settling around the joints. The gaps of culvert joints can impact erosion, with larger gaps leading to greater influx of soil particles into the culvert. Longer flow durations also result in greater erosion, as fluidization of the soil leads to increased erosion. On the other hand, larger lengths of culvert joints result in reduced erosion. Soil accumulation along the culvert joints cover and clogging contribute to this phenomenon. Culverts lacking joints cover suffer significant erosion, with soil particles entering the culvert. Sedimentary material is predominantly found within the culvert rather than being carried out by the flow. Additionally, the size of eroded soil particles affects the width of the gaps, typically ranging from 0.25 - 0.4 mm. The erosion phenomenon that occurs around culvert joints can lead to long-term effects.
The Impact of Developing Amenities and Corridor Infrastructure in the Borobudur Area on Landscape Visual Quality Almira, Nisrina Salsabila; Setiawan, Bakti
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 2 (2024): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i2.72466

Abstract

The Borobudur area, a priority tourism destination in Indonesia, is renowned for its rich historical and cultural significance. To enhance its appeal and improve the tourist experience, the government has been developing infrastructure and tourism amenities along the Borobudur area corridor, with significant advancements observed in the Palbapang-Borobudur corridor. This study employs the Scenic Beauty Estimation (SBE) method, a quantitative approach designed to evaluate landscape visual quality through tourists' perceptions. A survey of 60 tourists was conducted along the Palbapang-Borobudur corridor to assess the impact of these developments. The findings reveal that the development of amenities and infrastructure enhances the visual quality, particularly in the first segment at the Palbapang Lion Gate, characterized by scenic views of the Menoreh mountains and well-integrated vegetation. Landscape elements such as terraced buildings, natural vegetation, and harmonious design contribute positively to visual perception. In contrast, segments 2, 3, and 4 score lower due to mismatched building types, colors, and the presence of visually disruptive billboards. This study highlights the need for integrated planning and management to balance tourism development with the preservation of cultural and natural landscapes. The use of the SBE method provides a novel framework for assessing visual quality in heritage areas, offering valuable insights for sustainable tourism planning in similar contexts.

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