1. The document discusses the limit states and failure modes of bolted double angle tension members, including yielding of the gross section, fracture at the net section, and block shear failure.
2. It provides equations to calculate the effective net area considering shear lag effects, and the block shear strength considering both shear and tensile strengths.
3. An example calculation is shown to determine the tensile resistance of a double unequal angle member bolted at one leg, where fracture at the net section governs with a strength of 393.9 kN.
Prepared by madam rafia firdous. She is a lecturer and instructor in subject of Plain and Reinforcement concrete at University of South Asia LAHORE,PAKISTAN.
Prepared by madam rafia firdous. She is a lecturer and instructor in subject of Plain and Reinforcement concrete at University of South Asia LAHORE,PAKISTAN.
This publication provides a concise compilation of selected rules in the Eurocode 8, together with relevant Cyprus National Annex, that relate to the design of common forms of concrete building structure in the South Europe. Rules from EN 1998-1-1 for global analysis, regularity criteria, type of analysis and verification checks are presented. Detail design rules for concrete beam, column and shear wall, from EN 1998-1-1 and EN1992-1-1 are presented. This guide covers the design of orthodox members in concrete frames. It does not cover design rules for steel frames. Certain practical limitations are given to the scope.
The aim of this manual is to give the design application of the basic requirements of EC8 for new concrete and steel buildings using ETABS. This book can be used by users of ETABS modeler. Is not cover all the steps that you have to carry during designing model using ETABS but is a good manual for those who using Eurocodes.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from ETABS with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2. The process of designing elements will not be revolutionised as a result of using Eurocode 2.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from CSI ETABS & SAFE with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2.The process of designing elements will not be revolutionised as a result of using Eurocode 2. Due to time constraints and knowledge, I may not be able to address the whole issues.
This publication provides a concise compilation of selected rules in the Eurocode 8, together with relevant Cyprus National Annex, that relate to the design of common forms of concrete building structure in the South Europe. Rules from EN 1998-1-1 for global analysis, regularity criteria, type of analysis and verification checks are presented. Detail design rules for concrete beam, column and shear wall, from EN 1998-1-1 and EN1992-1-1 are presented. This guide covers the design of orthodox members in concrete frames. It does not cover design rules for steel frames. Certain practical limitations are given to the scope.
The aim of this manual is to give the design application of the basic requirements of EC8 for new concrete and steel buildings using ETABS. This book can be used by users of ETABS modeler. Is not cover all the steps that you have to carry during designing model using ETABS but is a good manual for those who using Eurocodes.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from ETABS with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2. The process of designing elements will not be revolutionised as a result of using Eurocode 2.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from CSI ETABS & SAFE with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2.The process of designing elements will not be revolutionised as a result of using Eurocode 2. Due to time constraints and knowledge, I may not be able to address the whole issues.
Prestress loss due to friction & anchorage take upAyaz Malik
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Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
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.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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.
05-Strength of Double Angle Bolted Tension Members (Steel Structural Design & Prof. Shehab Mourad)
1. 1 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
Strain, ε
εy
εuεy
εu
Stress,f
Fy
Fu
E
Strain, ε
εy
εuεy
εu
Stress,f
Fy
Fu
εy
εuεy
εu
Stress,f
Fy
Fu
E
Strength of Double Angle Bolted Tension Members
Limit States of a Tension Member
• A tension member can fail by reaching one of two limit states:
1. Excessive deformation: can occur due to the yielding of the gross section
along the length of the member, for example section a-a in Figure 2.
2. Fracture in the net section: can occur if the stress at the net section
(section b-b in Figure 2) reaches the ultimate stress Fu.
• The objective of design is to prevent these failures before reaching the
ultimate loads on the structure.
b b
aa
Gusset plate
b b
aa
200 x 12 mm bar
Gusset plate
22 mm diameter hole
Section a-a
Section b-b
Section a-a
Section b-b
2. 2 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
Fig 1. Bolted tension member
1) Yielding of gross area
2) Fracture at net area
Fig 2 Dimension of cross section
Fu = Ultimate Tensile Strength of angles
Net area = Anet = Gross area – area of holes = {Ag – ∑ dh t }
dh = hole diameter = bolt diameter + 3mm (or 1/8 in)
Ag = Gross Area of angles
Fy = Yield Tensile Strength of angles
Ø Rn = 0.75* Ae * Fu
Ø Rn = 0.9* Fy * Ag
Effective Area , Ae = Anet * U
y*
y"
t
g2
g1
b
h
tg
section (1-1)
hg
Pu
Pu
SS Le2Le1
1
1
t
Le1 S S
Lc
3. 3 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
Shear Lag effect
• Shear lag occurs when the tension force is not transferred uniformly
to all elements of the cross-section. This will occur when some
elements of the cross-section are not connected.
Strength reduction factor , U = (1 – x / Lc ) < 0.9
Lc = For bolted connections, l is the distance between the first and last
fasteners. For staggered bolts, the out-to-out dimension is used .
4. 4 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
Strength reduction factor , U = (1 – x / Lc ) < 0.9
x' = c.g of angle along horizontal leg
y' = c.g of angle along vertical leg
y* = c.g of the shaded area of angle
y* = Ag (one angle) * y' – {(Ye)* tangle}* (hangle– [Ye /2] )
Ag – (Ye) * tangle
• SBC 306 gives values of U for some connection configurations
that can be used instead of using Equation . These values are
summarized in Table below.
1 For W, M, and S shapes
or Tee cut from these
shapes
With flange
connected with 3 or
more fasteners per
line in the direction of
loading
bf ≥ 2/3d …..
U=0.9
b f < 2/3d ….
U=0.85
2 With web connected
with 4 or more
fasteners per line in
the direction of
loading
U=0.7
3 For all other shapes
including built up
sections
with at least 3
fasteners per line in
the direction of
loading
U=0.85
4 For all members with only two
fasteners per line
U=0.75
5 For all tension members where tension load is
transmitted onlybytransverse welds to some but
not all of the cross-sectional elements: Ae=UA,
A=area of the directly connected elements.
U = 1.0
6 For plates where tension
load is transmitted by
longitudinal welds only.
For l ≥ 2w
For 2w>l ≥ 1.5w
For 1.5w>l ≥ w
U = 1.00
U = 0.87
U = 0.75
x'
h
g1
ye
y*
y"
dh
t
t
y'
l
w
5. 5 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
T
T
(a)
(b)
(c)
T
T
Tension failure plane
(a)
(b)
3) Block shear in angle
• For some connection configurations, the tension member can
fail due to ‘tear-out’ of material at the connected end. This is
called block shear.
case 1 case 2
Fig 3 Block shear failure in bolted connection
Lt
Lv 1
Lt
Lv 1
P
Lc
6. 6 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
• Block shear strength is determined as the sum of the shear strength
on the shear path and the tensile strength on a tension path:
•
Block shear strength = net section fracture strength on shear path
+ gross yielding strength on the tension path
OR
Block shear strength = gross yielding strength of the shear path +
net section fracture strength of the tension path
Agt = Lt * ∑ tangle
Ant = ( Lt - ∑ dh ) * ∑ t angle
Agv = Lv * ∑ tangle
Anv = ( Lv - ∑ dh) * ∑ tangle
Where
Lv = 2*Lv1 (for given case 1)
Lv = Lv1 (for given case 2)
Agt = gross Area in tensile plane for 2 angle
Ant = net Area in tensile for 2 angle
Agv = gross Area in shear for 2 angle
Anv = net Area in shear for 2 angle
Fu = Ultimate Tensile Strength of angles
Fy = Yield Tensile Strength of angles
Effect of Staggered bolt holes on net area
If 0.6 * Fu * Anv > Fu * Ant , Ø Rn = 0.75* (0.6 * Fu * Anv + Fy * Agt)
If 0.6 * Fu * Anv < Fu * Ant , Ø Rn = 0.75 * (Fu * Ant + 0.6 * Fy * Agv)
S
g
1
1 2
2
For path 1-1
An = Ag – ∑ dh * t
For path 2-2
An = Ag + ∑ S2
t - ∑ dh *t
4 g
S
g
1
1 2
2
For angles bolted at one leg
For angles bolted at both legs
7. 7 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
Example 1.
Determine the factor tensile resistance of the given double unequal
angles, if are bolted at the long leg only.
Fig 4 Bolted tension member for example
given :
Fy = 250 MPa
Fu = 400 MPa
Le1 =Le2 = 51 mm
s = 76 mm
g = 51 mm
dbolt = 19 mm (for standard hole)
dhole = 19 + 3 = 22 mm
Solution :
1- Yielding of Ag.
Ag = 2*1020 = 2040 mm2
Ø Rn = 0.9 * Fy * Ag = 0.9 * 250 * 2040 * 10-3
= 459 kN
2- Fracture on Ae.
Ae = An * U
An = Ag – 2*dh*t = 2040 – 2* (22*6.4) = 1758.4 mm2
U = ( 1 – x/Lc) < 0.9
x the largest of
i) x'
ii) y" = g – y'
Fig 5 Dimension of cross section
g = 51 mm
ye = 38 mm
X' = 19.8 mm
y'
y"
g
b
t
h
tg
section (1-1)
hg
Pu
1
Pu
SS Le2Le1 1
Le1 S
Le2S
2L 89 x 76 x 6.4 mm
for single angle
Ag = 1020 mm2
x' = 19.8 mm
y' = 26.2 mm
8. 8 Prepared by Prof. Shehab Mourad – Department of Civil Eng. - KSU
y'' = {1020 * 26.2 – 38 * [89 * (38/2)] * 6.4}/{1020 – 38*6.4} = 12.49 mm
x = 20 mm or x = 51 – 12.49 = 38.51 mm
x∴ = 38.51 mm
Lc = 2s = 2 * 76 = 152 mm
U = ( 1 – 38.51/152) = 0.747 < 0.90
Ae = An * U = 1758.4 * 0.747 = 1313.5 mm2
Ø Rn = 0.75 * Ae * Fu = 0.75 * 1313.5 * 400 * 10-3
= 393.9 kN
3- Block shear rupture.
Fig 6 Block shear failure of single angle
Lv = 2s + Le = 2 * 76 + 51 = 203 mm
Agv = Lv* t = 203 * 2 * 6.4 = 2598.4 mm2
Anv = Agv – 2.5 * dhole* 2 * t = 2598.4 – 2.5 * 22 * 2 * 6.4 = 1894.4 mm2
Lt = leg – g = 89 – 51 = 38 mm
Agt = 38 * 2 * 6.4 = 486.4 mm2
Ant = 486.4 – 0.5 * 22 * 6.4 * 2 = 345.6 mm2
Fu * Ant = 400 * 345.6 = 138240 N
0.6 * Fu * Anv = 0.6 * 400 * 1894.4 = 454656 N > Fu * Ant
Ø Rn = 0.75 * (0.6 * Fu * Anv + Fy * Agt)
= 0.75 * (0.6 * 400 * 1894.4 + 250 * 486.4) * 10-3
= 432.2 kN
∴the strength of the bolted angles
Ø Rn = 393.9 kN which is governing by fracture
Lt
Lv