scholarly journals Perencanaan Ulang Struktur Atas Bangunan Kantor Dinas Pangan Provinsi Sumatera Barat

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Frengki Jasmanto
Keyword(s):  
Structural Design ◽  
Ground Level ◽  
Live Load ◽  
Dead Load ◽  
Construction Costs ◽  
Design Load ◽  
Structural Reinforcement ◽  
Earthquake Load ◽  
And Function

Upper structure is a building structure that is above the ground level such as columns, beams and floor plates. Each of thesecomponents has a different function in a structure. The reason for the appointment of this title is because the dimensions and useof reinforcement in this structure are inefficient and too wasteful. Therefore this title was appointed as a case study with the aim of planning the dimensions and structural reinforcement consisting of column elements, beams and floor plates in an efficient Padang city food office building and reviewing the structural design due to the use of reinforcement and dimensions too over or wasteful. . The method used in dimensioning and calculating reinforcement uses the SAP 2000 v14 method. With a design load that includes dead load, live load, and earthquake load in accordance with SNI 1727-2013 regarding the minimum load for planning buildings and other structures. Overall, the construction structure of this building is quite complex to discuss due to the additional roof load in the form of a helipad. From the results of this discussion, dimensions and structural reinforcement are more efficient and reduce construction costs, without reducing the quality and function theyshould be..

scholarly journals Analysis of the examination and maintenance of the Jakarta MRT Tunnel Wall

2018 ◽  
Vol 2 (1) ◽  
pp. 40-46
Author(s):  
Septiana Widi Astuti ◽  
Dadang Sanjaya ◽  
Ario Waskito
Keyword(s):  
Water Pressure ◽  
Tunnel Boring Machine ◽  
Tunnel Construction ◽  
Live Load ◽  
Dead Load ◽  
Tunnel Wall ◽  
Tunnel Boring ◽  
Ring Segment ◽  
Earthquake Load ◽  
Concrete Materials

Tunnel construction in the Jakarta MRT (MRTJ) is a concrete tunnel that was built using the Tunnel Boring Machine (TBM) drill machine. Tunnel walls in underground construction use pre-cast (segment) concrete materials arranged in a circle directly into one ring segment by TBM. Tunnel checks are needed to be the basis of diagnosis in tunnel care. Tunnel maintenance is carried out to maintain the condition of the tunnel to function properly and safely to be operated in a sustainable manner in accordance with the predicted load, including: the burden of soil or overburden, dead load and live load, load due to water pressure, earthquake load, and other loads that will affect tunnel construction. The results of the study that damage to the tunnel wall can be classified as leaks and cracks. Examination of components in the MRTJ tunnel wall by paying attention to the detail part of the wall in the form of segment bolts, connections between segments, concrete structures in segments. As for the maintenance carried out to repair and prevent tunnel wall leaks, it can be done by grouting polyurethane liquids and replacing rubber sealing on the bolts, for treatment due to cracks can be done by grouting liquid microscopy and plastering.

scholarly journals A comparative study of several bio-inspired algorithms in cost optimization of cellular beams

2021 ◽  
Vol 907 (1) ◽  
pp. 012001
Author(s):  
A Tjahjono ◽  
E J Wijayanti ◽  
D Prayogo ◽  
F T Wong
Keyword(s):  
Cost Efficiency ◽  
Cost Optimization ◽  
Live Load ◽  
Success Rates ◽  
Dead Load ◽  
Symbiotic Organisms Search ◽  
Bee Colony ◽  
Symbiotic Organisms ◽  
Selection Of

Abstract Castellated beams are commonly used in steel construction. This study will focus on castellated beams with circular-shaped openings, which are known as cellular beams. Cost optimization of cellular beams is needed to maintain cost efficiency. The optimization considers the selection of a root beam, the diameter of holes, and the total number of holes in the beam as the variables. Four metaheuristic algorithms are used to optimize the design, namely, the particle swarm optimization (PSO), differential evolution (DE), symbiotic organisms search (SOS), and artificial bee colony (ABC). A four-meter span beam with a 50 kN point live load in the middle of the beam and a 5 kN/m uniformly-distributed dead load are taken as the case study. The results indicate that the SOS algorithm yields the best optimization results in terms of the average, consistency, and convergence behavior with a 30 out of 30 success rates.

Karpophoroi deities and the Attic cult of Ge. Notes on IG II2 4758

2014 ◽  
Vol 7 ◽  
pp. 193-203
Author(s):  
Jenny Wallensten
Keyword(s):  
The Earth ◽  
And Function

Karpophoros, fruit-bearing, is an epithet easily considered as “literary”, i.e., a poetic name with little or no relation to cult. The epigraphic sources, however, clearly show us that gods thus named were offered divine worship. The epithet is found in connection with several deities. Goddesses of agriculture, such as Demeter, and Ge, the Earth, naturally carry this name, but so do Zeus, Dionysos and a goddess known as “The Aiolian”, who was sometimes associated with Agrippina. This paper surveys deities known as karpophoroi and examines what their cult entailed. Its focus is, however, on a brief Acropolis inscription, IG II2 4758, where Ge is honoured as Karpophoros, in accordance with an oracle. The case study provides insights into the Attic cult of Ge, the epithet Karpophoros, as well as the use and function of epithets within Greek dedicatory language.

scholarly journals Floating-bending tensile-integrity structures

2021 ◽  
Vol 8 (1) ◽  
pp. 89-95
Author(s):  
Micol Palmieri ◽  
Ilaria Giannetti ◽  
Andrea Micheletti
Keyword(s):  
Structural Design ◽  
Membrane Systems ◽  
Limit States ◽  
Form Finding ◽  
Supported Membrane ◽  
Tensegrity Systems ◽  
Matlab Implementation ◽  
Diamond Type ◽  
Conceptual Work

Abstract This is a conceptual work about the form-finding of a hybrid tensegrity structure. The structure was obtained from the combination of arch-supported membrane systems and diamond-type tensegrity systems. By combining these two types of structures, the resulting system features the “tensile-integrity” property of cables and membrane together with what we call “floating-bending” of the arches, a term which is intended to recall the words “floating-compression” introduced by Kenneth Snelson, the father of tensegrities. Two approaches in the form-finding calculations were followed, the Matlab implementation of a simple model comprising standard constant-stress membrane/cable elements together with the so-called stick-and-spring elements for the arches, and the analysis with the commercial software WinTess, used in conjunction with Rhino and Grasshopper. The case study of a T3 floating-bending tensile-integrity structure was explored, a structure that features a much larger enclosed volume in comparison to conventional tensegrity prisms. The structural design of an outdoor pavilion of 6 m in height was carried out considering ultimate and service limit states. This study shows that floating-bending structures are feasible, opening the way to the introduction of suitable analysis and optimization procedures for this type of structures.

Retail Suburbanization, Modernization, and Growth in Sydney during Australia’s Postwar Boom

2021 ◽  
pp. 009614422110236
Author(s):  
Matthew Bailey
Keyword(s):  
Capital City ◽  
Growth Strategies ◽  
Capital Cities ◽  
Form And Function ◽  
Urban Core ◽  
Socially Constructed ◽  
And Function ◽  
Retail Formats ◽  
Car Driving

This article uses Sydney as a case study to examine the process of retail decentralization during Australia’s postwar boom, showing how the form and function of capital city retailing changed completely in just a couple of decades. Suburban migration, the emergence of mobile car-driving consumers, socially constructed gender roles, the ongoing importance of public transport networks, planning regimes that sought to concentrate development in designated zones, and business growth strategies that deployed retail formats developed in America all played a role in shaping the form and function of Australian retailing during the postwar boom. In the process, the retail geographies of Australia’s capital cities were transformed from highly centralized distribution structures dominated by the urban core, to decentralized landscapes of retail clusters featuring modern retail forms like the supermarket and shopping center that would come to define Australian retailing for the remainder of the century.

scholarly journals Development of Material Combination Model Considering Economics and Construction Efficiency for G-SEED Certification

2021 ◽  
Vol 13 (6) ◽  
pp. 3535
Author(s):  
Byung-Ju Jeon ◽  
Byung-Soo Kim
Keyword(s):  
Structural Design ◽  
Material Selection ◽  
Selection Model ◽  
Construction Costs ◽  
Seed Certification ◽  
Evaluation Scores ◽  
The Cost ◽  
Material Information ◽  
Business As Usual ◽  
Construction Efficiency

The Korean government proposed a goal to reduce its greenhouse gas emissions by 37% compared to business-as-usual levels by 2030 and launched the Green Standard for Energy and Environmental Design (G-SEED) certification system. The certification requires meeting the required score and material selection with a secured economy and construction efficiency. However, most buildings only focus on obtaining the certification scores instead of choosing economical materials with high construction efficiency. This research focused on developing a material selection model that considers both the construction efficiency and economy of the materials and the acquisition of material and resource evaluation scores from the G-SEED certification. This research, therefore, analyzed actual data to automate the material selection and compare alternatives to using a genetic algorithm to obtain optimized alternatives. This model proposes an alternative to constructability and economy when the required score and material information is entered. When the model was applied to actual cases, the result revealed a reduction in construction costs of about 37% compared to the cost with the traditional methods. The material selection model from this research can benefit construction project owners in terms of cost reduction, designers in terms of structural design time, and constructors in terms of construction efficiency

Extending Production Life of Mature Fields in the North Sea with Multilateral Technology

2021 ◽  
Author(s):  
Matthew Kelsey ◽  
Magnus Raaholt ◽  
Olav Einervoll ◽  
Rustem Nafikov ◽  
Stian Amble
Keyword(s):  
Environmental Impact ◽  
North Sea ◽  
Construction Costs ◽  
The North ◽  
Economic Production ◽  
Successful Case ◽  
Isolation Methods ◽  
Cumulative Production ◽  
The North Sea

Abstract Multilateral technology has for nearly three decades extended the production life of fields in the North Sea by delivering a higher recovery factor supported by the cumulative production of the multiple laterals. Additionally, operators continue to look at methods to reduce the environmental impact of drilling and intervention. Taking advantage of the latest multilateral technology can turn otherwise unviable reservoirs into economically sound targets by achieving a longer field life while minimizing construction costs, risk, and environmental impact. This paper will focus on mature fields in the region that have used multilateral applications for wells that were reaching the end of their life and have been extended to further economic production. This paper discusses challenges faced to provide a multilateral solution for drilling new lateral legs in existing wells where there is a lack of available slots to drill new wells. Additionally, discussion will cover completion designs that tie new laterals into existing production casing. The case study will include discussion of workover operations, isolation methods, and lateral creation systems. The paper focuses on the challenges, solutions, and successful case study of a retrofit multilateral well constructed in the North Sea which extended production life in a mature field by using innovative multilateral re-entry methods. The paper also provides insight as to methodology for continually improving reliability of multilateral installations to maximize efficiencies.

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