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The document summarizes a truss bridge called the Purple Star located near the Upper Peninsula. The Purple Star is an 18.29 mile long truss bridge that cost $13,000,000 to build. It is made of the finest steel in the world and its design makes it resistant to wind, lightning, and earthquakes.
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Truss bridges جسور وكباري معدنية شبكية-
The document discusses truss bridges, which are bridges that use a truss structure to support loads. Truss bridges use a series of triangles to distribute forces and support weight, allowing them to span longer distances without collapsing. They are a common type of bridge that is used for highways and railroads around the world.
Steel-vs-concrete and timber
ADVANTAGES AND DISADVANTAGES OF STEEL AS A STRUCTURAL DESIGN MATERIAL
The following advantages in general may be credited to steel as a structural design material:
1. High strength/weight ratio. Steel has a high strength/weight ratio. Thus, the dead weight of steel structures is relatively small. This property makes steel a very attractive structural material for
a. High-rise buildings
b. Long-span bridges
c. Structures located on soft ground
d. Structures located in highly seismic areas where forces acting on the structure due to an earthquake are in general proportional to the weight of the structure.
2. Ductility. As discussed in the previous section, steel can undergo large plastic deformation before failure, thus providing large reserve strength. This property is referred to as ductility. Properly designed steel structures can have high ductility, which is an important characteristic for resisting shock loading such as blasts or earthquakes. A ductile structure has energy-absorbing capacity and will not incur sudden failure. It usually shows large visible deflections before failure or collapse.
3. Predictable material properties. Properties of steel can be predicted with a high degree of certainty. Steel in fact shows elastic behavior up to a relatively high and usually well-defined stress level. Also, in contrast to reinforced concrete, steel properties do not change considerably with time.
4. Speed of erection. Steel structures can be erected quite rapidly. This normally results in quicker economic payoff.
5. Quality of construction. Steel structures can be built with high-quality workmanship and narrow tolerances.
6. Ease of repair. Steel structures in general can be repaired quickly and easily.
7. Adaptation of prefabrication. Steel is highly suitable for prefabrication and mass production.
8. Repetitive use. Steel can be reused after a structure is disassembled.
9. Expanding existing structures. Steel buildings can be easily expanded by adding new bays or wings. Steel bridges may be widened.
10. Fatigue strength. Steel structures have relatively good fatigue strength.
DISADVANTAGES OF STEEL
1. General cost. Steel structures may be more costly than other types of structures.
2. Fireproofing. The strength of steel is reduced substantially when heated at temperatures commonly observed in building fires. Also, steel conducts and transmits heat from a burning portion of the building quite fast. Consequently, steel frames in buildings must have adequate fireproofing.
3. Maintenance. Steel structures exposed to air and water, such as bridges, are susceptible to corrosion and should be painted regularly. Application of weathering and corrosion-resistant steels may eliminate this problem.
4. Susceptibility to buckling. Due to high strength/weight ratio, steel compression members are in general more slender and consequently more susceptible to buckling than, say, reinforced concrete compression members. As a result, considera
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This document provides information about metal truss bridges, including their basic components and configurations. It explains that trusses can be classified as pony, through, or deck bridges depending on their design. Common truss types include Pratt, Whipple, Warren, Baltimore, and Pennsylvania configurations, which vary in their arrangement of diagonal and vertical members. Historic truss bridges used either pinned or riveted connections. The document encourages educating others about the importance of preserving historic bridges.
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a. High-rise buildings
b. Long-span bridges
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d. Structures located in highly seismic areas where forces acting on the structure due to an earthquake are in general proportional to the weight of the structure.
2. Ductility. As discussed in the previous section, steel can undergo large plastic deformation before failure, thus providing large reserve strength. This property is referred to as ductility. Properly designed steel structures can have high ductility, which is an important characteristic for resisting shock loading such as blasts or earthquakes. A ductile structure has energy-absorbing capacity and will not incur sudden failure. It usually shows large visible deflections before failure or collapse.
3. Predictable material properties. Properties of steel can be predicted with a high degree of certainty. Steel in fact shows elastic behavior up to a relatively high and usually well-defined stress level. Also, in contrast to reinforced concrete, steel properties do not change considerably with time.
4. Speed of erection. Steel structures can be erected quite rapidly. This normally results in quicker economic payoff.
5. Quality of construction. Steel structures can be built with high-quality workmanship and narrow tolerances.
6. Ease of repair. Steel structures in general can be repaired quickly and easily.
7. Adaptation of prefabrication. Steel is highly suitable for prefabrication and mass production.
8. Repetitive use. Steel can be reused after a structure is disassembled.
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1. General cost. Steel structures may be more costly than other types of structures.
2. Fireproofing. The strength of steel is reduced substantially when heated at temperatures commonly observed in building fires. Also, steel conducts and transmits heat from a burning portion of the building quite fast. Consequently, steel frames in buildings must have adequate fireproofing.
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This document provides information about metal truss bridges, including their basic components and configurations. It explains that trusses can be classified as pony, through, or deck bridges depending on their design. Common truss types include Pratt, Whipple, Warren, Baltimore, and Pennsylvania configurations, which vary in their arrangement of diagonal and vertical members. Historic truss bridges used either pinned or riveted connections. The document encourages educating others about the importance of preserving historic bridges.
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This approach leverages the LLM’s ability to understand the nuances of natural language and the structure of documents within Apache Solr.
The LLM acts as an intermediary agent, offering a transparent experience to users automatically and potentially uncovering relevant documents that conventional search methods might overlook. The presentation will include the results of this experimental work, lessons learned, best practices, and the scope of future work that should improve the approach and make it production-ready.
AppSec PNW: Android and iOS Application Security with MobSF
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
What is an RPA CoE? Session 2 – CoE Roles
In this session, we will review the players involved in the CoE and how each role impacts opportunities.
Topics covered:
• What roles are essential?
• What place in the automation journey does each role play?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
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Bridge
- 1. Bridges!
- 2. Truss Bridges are Bridges using Triangular Beams to support it!
- 3. Our bridge Our Bridge is a Truss Bridge, It is called “Purple Star!”
- 4. Our Bridge is located near the Upper Peninsula, it’s 18.29 miles long!