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Related Concept Videos

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

209
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
209
Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

135
For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
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Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

1.3K
When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
1.3K
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

107
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
107
Design Consideration01:22

Design Consideration

277
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
277
Workability of Concrete01:25

Workability of Concrete

140
The workability of concrete is a crucial property that affects its handling, placing, and finishing during construction. It describes the ease with which concrete can be mixed, placed, compacted, and finished. Workability is primarily concerned with the concrete's movement and its ability to resist internal friction and external resistance from molds and reinforcements during the application process.
Concrete's workability is determined by its resistance to internal forces that arise...
140

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Multi-objective integrated optimization study of prefabricated building projects introducing sustainable levels.

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This study introduces a multi-objective optimization model for construction projects, integrating schedule, cost, and sustainability. The NSGA-II algorithm effectively identifies optimal solutions for greener engineering project management.

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Area of Science:

  • Construction Management
  • Sustainable Engineering
  • Operations Research

Background:

  • Increasing demand for greener construction necessitates higher standards in engineering project management.
  • Traditional project management often optimizes for schedule and cost, neglecting sustainability.
  • Integrating sustainability into project management is crucial for low-carbon development.

Purpose of the Study:

  • To develop a multi-objective optimization model for engineering projects considering schedule, cost, and sustainability.
  • To incorporate carbon emission factors into the total cost of construction.
  • To analyze the economic, environmental, and social impacts of assembled buildings for sustainability.

Main Methods:

  • Developed a duration-cost-sustainability multi-objective optimization model using the double code arrow diagram.
  • Utilized the NSGA-II algorithm to obtain Pareto optimal solutions.
  • Employed the efficacy coefficient method for decision-making from the Pareto set.

Main Results:

  • The Pareto solution set effectively supports project manager decision-making.
  • The NSGA-II algorithm proved effective in solving the complex multi-objective optimization problem.
  • The study demonstrates a viable approach to optimizing construction projects for sustainability.

Conclusions:

  • The proposed model and algorithm offer a robust framework for balancing project constraints.
  • Integrating sustainability objectives enhances traditional project management models.
  • This research provides valuable insights for sustainable and efficient engineering project management.