Precast concrete construction involves casting concrete structural elements at a manufacturing facility rather than on site. This allows for rapid construction, high quality control, and easy incorporation of prestressing. Precast concrete provides advantages like speed of erection, durability, and economy, but also has disadvantages such as weight, limited flexibility in design, and need for skilled workmanship and lifting equipment on site. Common precast concrete elements include walls, slabs, beams, and structural framing using techniques like welded plates and rebar splicing.
It is the presentation based on precast concrete construction which includes each and every point and scope which may be useful to civil engineering students
It is the presentation based on precast concrete construction which includes each and every point and scope which may be useful to civil engineering students
This presentation defines and enables the readers to understand the concept of modular construction and the aspects and applicability for the execution of modular construction.
Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting them to the construction site where the structure is to be located.
Precast and Prefabricated components and structures and the connection betwee...nishant patyal
Building construction is an ancient human activity. It began with the purely functional need for a controlled environment to moderate the effects of climate. Constructed shelters were one means by which human beings were able to adapt themselves to a wide variety of climates and become a global species
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
This presentation defines and enables the readers to understand the concept of modular construction and the aspects and applicability for the execution of modular construction.
Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting them to the construction site where the structure is to be located.
Precast and Prefabricated components and structures and the connection betwee...nishant patyal
Building construction is an ancient human activity. It began with the purely functional need for a controlled environment to moderate the effects of climate. Constructed shelters were one means by which human beings were able to adapt themselves to a wide variety of climates and become a global species
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
The Austrian Standards Institute published ÖNORM B 2203-1 “Underground Works – Works contract, Part 1: Cyclic driving (conventional tunnelling)” in 2001.
This Austrian Standard includes particular directives for tendering procedures, preparation of the bid and terms of contract for the execution of conventional tunnelling called “New Austrian Tunnelling Method (NATM)”.
In addition to the Standard the Austrian Society for Geomechanics in 2011 published the document “The Austrian Practice of NATM Tunnelling Contracts” which describes the application of the Standard in detail with respect to the NATM. The main chapters of the document are
Tendering and Costing as well as Construction and Payment with information in detail about
time-dependent costs,
tunnelling interruptions
, tunnel classes
, difficulties due to water ingress
, over-excavation, excess concrete
, selection of supporting measures and classifying tunnelling
. Examples describing the method are presented in an annex
. The Austrian Society for Geomechanics recommends the download of this document in addition to the Austrian Standard ÖNORM B 2203-1:2001. The document “The Austrian Practice of NATM Tunnelling Contracts” with its annex is free of charge. Learn more: http://www.as-institute.at/en/standards/downloads.html
Closing Lecture: World Tunnel Congress 2014, Iguassu Falls, Brazil
Quo Vadis Tunnel Engineering?Predicting the Unpredictable
by Z T Richard Bieniawski v. Preinl
م.11
مبادرة #تواصل_تطوير
المحاضرة الحادية العاشرة من المبادرة مع
الأستاذ الدكتور/ إسلام عز العرب
استاذ الانشاءات بكلية هندسة طنطا
بعنوان
"تكنولوجيا المنشآت الخرسانية مسبقة الصب "
العاشرة مساء بتوقيت مكة المكرمة الثلاثاء 12مايو2020
وذلك عبر تطبيق زووم
علما ان هناك بث مباشر للمحاضرة بالتوازي على قناة اليوتيوب الخاصة بجمعية المهندسين المصريين
http://www.youtube.com/watch?v=EQAH3_CUWJM
ونأمل أن نوفق في تقديم ما ينفع المهندس ومهمة الهندسة في عالمنا العربي
والله الموفق
ملاحظة : تجنبا لاي ظروف, لطفا المشاركة على قناة التليجرام للحصول على دعوات المحاضرات على ZOOM
رابط اللينكدان
www.linkedin.com/company/eeaksa-egyptian-engineers-association/
رابط قناة التليجرام
https://t.me/EEAKSA
رابط قناة الفيسبوك
https://www.facebook.com/EEAKSA/
رابط قناة اليوتيوب
https://www.youtube.com/user/EEAchannal
رابط التسجيل العام للمحاضرات
https://forms.gle/vVmw7L187tiATRPw9
Definition Where this system can be used
Features of the Grid Slab
Decorative grid slabs in historical structures
Types of Grid Slab
Comparison: Long Span Structures
Construction
Technique
Formwork Required
Reinforcements Details
Modification in Grid Slab for Utility
Services Provided in Grid Slab
Benefits
Iconic Landmarks using Grid Slabs
Atecon products focus on solving the dilemma on how to guarantee the proper cover or distancing between the metallic structure (rebar) and the terrain or formwork.
In any type of of construction site our Accessories will help you achieve better efficiencies, security and productivity
Gain a basic understanding of wood subfloor construction, residential construction trends and recommendations for surface preparation and mortar and grout selection before installing tile over wood substrates. Learn more at tecspecialty.com.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
2. What is Precast Concrete ?
Precast concrete means a concrete member that is cast and cured at a location other than its final designated location. The use of reinforced concrete is a relatively recent invention, usually dated to 1848 when jean- Louis Lambot became the first to use it. Joseph Monier, a French gardener, patented a design for reinforced garden tubs in 1868, and later patented reinforced concrete beams and posts for railway and road guardrails.
3. Advantages of Precast Concrete Construction
Very rapid speed of erection
Good quality control
Entire building can be precast-walls, floors , beams , etc.
Rapid construction on site
High quality because of the controlled conditions in the factory
Prestressing is easily done which can reduce the size and number of the structural members.
4. Advantages of Precast Concrete Wall Systems
Aesthetic versatility
Durability
Security
Low maintenance
Economy
5. Disadvantages of Precast Concrete Construction
Very heavy members
Camber in beams and slabs
Very small margin for error
Connections may be difficult
Somewhat limited building design flexibility
Because panel size is limited, precast concrete can not be used for two-way structural systems.
Economics of scale demand regularly shaped buildings.
Need for repetition of forms will affect building design.
Joints between panels are often expensive and complicated.
Skilled workmanship is required in the application of the panel on site.
Cranes are required to lift panels.
6. Popular Uses of Precast Concrete
Concrete curtain walls
As an exterior cladding (may include exposed aggregate)
For structural walls
Ability to precast in three dimensions allows precast panels to form parts of mechanical systems
7. Slabs:
a) Flat slab -
Thickness of 4", 6" and 8"
Spans up to 25’-0"
Standard panel width = 4’-0"
Typical designations = FS4 (FS = Flat Slab, 4 = thickness of slab in inches)
precast concrete
b) Hollow Core slab -
Thicknesses of 4", 6", 8", 10" and 12"
Spans up to 40’-0"
Standard panel width = 4’-0"
Typical designations = 4HC6 (4 = panel width in feet, HC = Hollow Core, 6 = slab thickness in inches)
8. Beams:
a) Rectangular Beam (RB) -
Typical beam width = 12" or 16"
Spans up to 50’-0"
Typical designation = 16RB24 (16 = width in inches, 24 = depth in inches)
b) "L" and "IT" (inverted "Tee") beams (LB and IT) -
Typically used to support slabs, walls, masonry, and beams
Typical beam width = 12"
Depths of 20", 28", 36", 44", 52" and 60"
9.
10.
11. c) Double Tee Beam (DT) -
Combination beam and slab
Spans up to 100’-0"
Typical width = 8’-0"
Depths of 12", 18", 24" and 32"
Designation = 8DT24+2 (8 = width in feet, 24 = depth, +2 = 2" topping)
12. d) Single Tee Beam (ST) -
Combination beam and slab
Spans up to 120’-0"
Typical width = 8’-0"
Typical depths of 36" and 48"
Designation = 8ST36+2 (8 = width in feet, 24 = depth, +2 = 2" topping)
13. Walls:
Wall panels available in standard 8’-0" widths.
Can be flat, or have architectural features such as window and door openings, ribs, reveals, textures, sandwich (insulation built-in), sculptured, etc.
16. Weld Plates
The most common method of attachment of precast members is by use of steel weld plates. Typically, the precast members have embedded plates that can be used as welding surfaces for loose connecting plates or angles (see below):
17. Rebar and Grout
Used typically with slabs, reinforcing bars are spliced into slabs and grouted in place (see below):