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Research Article
Strategic Planning Model for a Construction Company in the Event of an Earthquake
Abeer Mubarak Mutahar*
,
Ibrahim Ethem Tarhan
Issue:
Volume 10, Issue 1, February 2025
Pages:
1-15
Received:
24 November 2024
Accepted:
7 December 2024
Published:
21 January 2025
DOI:
10.11648/j.jccee.20251001.11
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Views:
Abstract: Among all the disasters, earthquakes pose significant danger to the lives of people and buildings that are still under construction. The requirements argue that there is a need for hard-and-core planning to deal with impacts of earthquakes on constructions. This paper also partly focuses on the evolving of the strategies on the construction companies for the regions which are sensitive to earthquakes based on the SWOT, EFE and IFE prospective and analysis of strengths and weaknesses. The model developed in this paper is useful in helping construction companies prepare and respond to-earthquake contingencies in construction projects. This includes market information and competitor data and resources and threats, business targets and any other that relates to business legality, markets and targets. Partitions in this paper are company vision and mission, company SWOT analysis, earth-quake risks, company strategy, and company performance. However, it also discusses how to adapt for and assess SWOT, and the conditions before and after an earthquake occurs. This model will create a strong platform for the construction companies dealing with the earth-quake resistant constructions with a forecast of sustainability and preparedness. The following are the plans that were drawn to create novel strategies towards handling the responses to quakes and to extend the enterprise. Although the model can be developed farther, proper usage of resources, effective and efficient employee involvement and establishment of control over cost will improve the responses to earthquakes. The information helps to make a better protection of earthquakes in construction dealing with urging Companies to take better preparations. The paper persists in calling on the construction firms to carry on innovating their approaches in handling its earthquake.
Abstract: Among all the disasters, earthquakes pose significant danger to the lives of people and buildings that are still under construction. The requirements argue that there is a need for hard-and-core planning to deal with impacts of earthquakes on constructions. This paper also partly focuses on the evolving of the strategies on the construction compani...
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Research Article
New Energy Loss Expression for Stepped Spillways with Channel Slopes 26.6° and Below
Okechukwu Ozueigbo*,
Jonah Agunwamba
Issue:
Volume 10, Issue 1, February 2025
Pages:
16-26
Received:
14 October 2024
Accepted:
13 November 2024
Published:
22 January 2025
Abstract: A stepped spillway is a hydraulic structure built at storage and detention dams to discharge flood water that cannot be safely kept in the reservoir. It was created to minimize the kinetic energy that would have otherwise produced dangerous scour at the natural river bed beneath the spillway. They discharge this energy in floodwater using their stepping nature. Several studies show the detrimental consequences of falling water's kinetic energy on the river bed underneath the structure. Only a handful of these studies, however, have evaluated the impact of energy losses caused by stepped spillways with channel slopes 26.6° or less. As a result, there are gaps in the rules and recommendations for designers of stepped spillways with channel slopes below 26.6°. Furthermore, the existing models for forecasting energy dissipation in stepped spillways for channels of all slopes include a parameter, the friction factor, f, which is difficult to estimate with precision, leading to its subjective estimation by those involved in the stepped spillway design. The goal of this study is not only to provide designers with design recommendations and information for stepped spillways with channel slopes below 26.6°, but also to eliminate the 'troublesome' frictional factor; f. Using phase-detection intrusive probes, air-water flow tests were carried out in nappe, transitional, and skimming flows on a stepped spillway with channel slope below 26.6° in a large facility. New expressions for evaluating energy losses in stepped spillways with slopes 26.6° or less are developed. Regarding energy dissipation, the data from the latest models compare well with the measured data, with high coefficients of correlation that range between 0.95 and 0.99. All of the measured data and the estimated data are in good agreement. The models are simple to use.
Abstract: A stepped spillway is a hydraulic structure built at storage and detention dams to discharge flood water that cannot be safely kept in the reservoir. It was created to minimize the kinetic energy that would have otherwise produced dangerous scour at the natural river bed beneath the spillway. They discharge this energy in floodwater using their ste...
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Review Article
Comparison of Crack Measurement and FEM Analysis Using Infrared Camera for Concrete Surface of Coating-type Resin Sensor
Issue:
Volume 10, Issue 1, February 2025
Pages:
27-35
Received:
5 January 2025
Accepted:
26 January 2025
Published:
17 February 2025
DOI:
10.11648/j.jccee.20251001.13
Downloads:
Views:
Abstract: Infrastructure safety inspections typically rely on visual inspections and hammering tests by inspectors. However, a significant challenge is the variability in inspection results due to differences in inspectors' technical expertise. To address this issue, we propose an inspection method and preventive work using a coating-type resin sensor combined with an infrared camera. The use of thermography as a nondestructive evaluation technique is increasingly popular for maintaining concrete structures. Most inspections only evaluate the locations and shapes of defects on surfaces. Yet, no method has been developed to assess the depth of defects. In our approach, infrared-reactive resin is applied, and thermographic images of the target area are captured sequentially. Temperature curves obtained at each pixel during the cooling process are analyzed using the Fourier transform to differentiate defect states in various parts of the temperature distribution. The temperature change correlates with the defect size. Approximately 5% aluminum powder is mixed into the applied gel resin; due to its specific gravity, it tends to concentrate in areas damaged by compression failure or float. This report discusses technologies for identifying defects and measuring their size in infrared-reactive resin. It examines the effectiveness of preventive measures to prevent the scattering and collapse of defects caused by structural degradation. This paper presents a concentric loading test on reinforced concrete columns confined by gel resin ties. Test variables include concrete compressive strength and FEM analyses, ranging from 232-244 N/mm2, both below and above the equipment hole that caused the defect, and a comparison with test specimens free of defects to measure the relationship.
Abstract: Infrastructure safety inspections typically rely on visual inspections and hammering tests by inspectors. However, a significant challenge is the variability in inspection results due to differences in inspectors' technical expertise. To address this issue, we propose an inspection method and preventive work using a coating-type resin sensor combin...
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