menu
bartleby
search
close search
Hit Return to see all results
close solutoin list

a . A W 18 × 35 beam is to be connected to a W 14 × 53 column. F y = 50 ksi for both the beam and the column. The connection is at a distance from the end of the column that is more than the depth of the column. Use A36 steel for the web plate and use LRFD to design a connection similar to the one shown in Figure 8.37a for a factored moment of 220 ft-kips and a factored reaction of 45 kips. If column stiffeners are needed, use A36 steel and specify the required dimensions. b . If the factored column shear adjacent to the connection is V u = 0 , and P u / P y = 0.6 , determine whether panel zone reinforcement is required. If it is, provide two alternatives: (1) a doubler plate of A36 steel and (2) diagonal stiffeners of A36 steel.

BuyFindarrow_forward

Steel Design (Activate Learning wi...

6th Edition
Segui + 1 other
Publisher: Cengage Learning
ISBN: 9781337094740
Chapter 8, Problem 8.7.3P
Textbook Problem
1 views

a. A W 18 × 35 beam is to be connected to a W 14 × 53 column. F y = 50 ksi for both the beam and the column. The connection is at a distance from the end of the column that is more than the depth of the column. Use A36 steel for the web plate and use LRFD to design a connection similar to the one shown in Figure 8.37a for a factored moment of 220 ft-kips and a factored reaction of 45 kips. If column stiffeners are needed, use A36 steel and specify the required dimensions.

b. If the factored column shear adjacent to the connection is V u = 0 , and P u / P y = 0.6 , determine whether panel zone reinforcement is required. If it is, provide two alternatives: (1) a doubler plate of A36 steel and (2) diagonal stiffeners of A36 steel.

To determine

(a)

The design of a connection similar to the given connection by using LRFD.

Explanation of Solution

Given:

W18×35 beam

W14×53 column

Fy = 50 ksi

A36 steel

Factored moment = 220 ft-kips

Factored reaction = 45 kips

And the given connection is

Formula used:

Rn=6.25Fyft2f

Rn is nominal strength.

Fyf is yield stress of the column flange.

tf is thickness of the column flange.

Rn=Fywtw(5k+lb)

k is distance from the outer flange surface of the column to the toe of the fillet in the column web.

lb is length of applied load 5 thickness of beam flange or flange plate.

Fyw is yield stress of the column web.

tw thickness of the column web.

ϕRn=ϕ{0.80tw2[1+3(lbd)(twtf)1.5]EFywtftw}

d is total column depth

Ast=PbfϕRnminϕstFystϕst= 0.90 (since this is a yielding limit state)

ϕst= 0.90 (since this is a yielding limit state)

Pbf is applied factored load from the beam flange or flange plate

ϕRnmin is smallest of the strengths corresponding to the three limit states

Calculation:

Web plate:

Neglect eccentricity

Try ¾ in. diameter Group A bearing type bolts. Assume that threads are in the plane of shear.

Ab=πd24=π(3/4)24=0.4418in.2

Shear capacity of one bolt is

ϕRn=ϕFnvAb=0.75(54)(0.4418)=17.89kips/bolt

Number of bolts required is

4517.89=2.52

Try 4 bolts

Determine plate thickness required for bearing. Assume that

ϕRn=ϕ(2.4dtFu)=0.75(2.4)(3/4)t(58)=78.3t

Load resisted by each bolt = 454=11.25kips

Let ϕRn=11.25=78.3t

t=0.144in.

Try t=316in.

Determine whether plate or beam web controls bearing. For the plate,

tFu=316(58)=10.9kips/in.

For the beam web, twFu=0.30(65)=19.5kips/in.>10.9kips/in.

Therefore, plate controls.

Check bearing strength assumption:

h=34+116=1316in.

For the hole nearest the edge, minimum le=1in.

Try 112in..

lc=leh2=1.513/162=1.094in.ϕRn=ϕ(1.2lctFu)=0.75(1.2)(1.094)(3/16)(58)=10.71kipsϕ(2.4dtFu)=0.75(2.4)(3/4)(3/16)(58)=14.68kips>10.71kips

Therefore, use ϕRn=10.71kips/bolt

For other bolts, minimum s = 2.667(3/4)=2.0in.

Try s=212in.

lc=sh=2.51316=1.688in.ϕRn=ϕ(1.2lctFu)=0.75(1.2)(1.688)(3/16)(58)=16.52kipsϕ(2.4dtFu)=14.68kips<16.52kips

Therefore, use ϕRn=14.68kips/bolt

Total shear/ bearing strength (bearing controls at each bolt location):

ϕRn=10.71+3(14.68)=54.8kips>45kips (OK)

Total length of connection = 2(1.5)+3(2.5)=10.5in.

Use four ¾ in. diameter Group A bolts.

Determine plate thickness required for shear:

Shear yielding strength is

ϕRn=1.0(0.6FyAg)

Let 45=1.0(0.6)(36)(10.5t)

t=0.198in.

Try t=14in.

Check shear rupture strength:

Use hole diameter = 34+18=78in.

Anv=(10.54×78)(14)=1.75in.2

ϕRn=ϕ(0

To determine

(b)

Whether panel zone reinforcement is required.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 8 Solutions

Steel Design (Activate Learning with these NEW titles from Engineering!)
Show all chapter solutions
add
Ch. 8 - Solve Problem 8.2-2 by the ultimate strength...Ch. 8 - The bolt group shown in Figure P8.2-12 consists of...Ch. 8 - For the conditions of Problem 8.2-12, determine...Ch. 8 - Check the adequacy of the bolts. The given loads...Ch. 8 - A beam is connected to a column with 7 8...Ch. 8 - Check the adequacy of the bolts for the given...Ch. 8 - Check the adequacy of the bolts. The given load is...Ch. 8 - Check the adequacy of the bolts in the connection...Ch. 8 - The flange of a portion of a WT620 is used as a...Ch. 8 - A beam is connected to a column with 3 4...Ch. 8 - A bracket cut from a WT-shape is connected to a...Ch. 8 - For the following designs, use A36 steel for the...Ch. 8 - Same as Problem 8.3-9, but use ASD.Ch. 8 - Use an elastic analysis and determine the maximum...Ch. 8 - Use an elastic analysis and determine the maximum...Ch. 8 - Use an elastic analysis and determine the maximum...Ch. 8 - Use an elastic analysis and check the adequacy of...Ch. 8 - Use E70 electrodes and determine the required weld...Ch. 8 - Check the adequacy of the weld. The 20-kip load is...Ch. 8 - Use an elastic analysis and compute the extra load...Ch. 8 - Use an elastic analysis and compute the extra load...Ch. 8 - An L663 8 is attached to a 3 8 -in.-thick gusset...Ch. 8 - Solve Problem 8.4-1 by the ultimate strength...Ch. 8 - Solve Problem 8.4-4 by the ultimate strength...Ch. 8 - Solve Problem 8.4-7 by the ultimate strength...Ch. 8 - A connection is to be made with the weld shown in...Ch. 8 - Same as Problem 8.4-13, but use ASD.Ch. 8 - Use the elastic method and design a welded...Ch. 8 - Same as Problem 8.4-15, but use ASD.Ch. 8 - A single-angle tension member is connected to a...Ch. 8 - Same as Problem 8.4-17, but use ASD.Ch. 8 - a. Use LRFD and design a welded connection for the...Ch. 8 - Same as Problem 8.4-19, but use ASD.Ch. 8 - Determine the maximum load in the weld in kips per...Ch. 8 - Determine the maximum load in the weld in kips per...Ch. 8 - Use the maximum size E70 fillet weld and compute...Ch. 8 - A bracket plate of A36 steel is welded to a W1250...Ch. 8 - A WT741 bracket is connected to a W14159 column...Ch. 8 - A W1850 beam is connected to a W1499 column. To...Ch. 8 - A W1645 beam is connected to a W1045 column as...Ch. 8 - Same as Problem 8.6-2, but use ASD.Ch. 8 - Design a three-plate moment connection of the type...Ch. 8 - A service-load moment of 118 ft-kips, 30 dead load...Ch. 8 - Determine whether column stiffeners are required...Ch. 8 - a. A W1835 beam is to be connected to a W1453...Ch. 8 - Investigate the adequacy of the bolts in the given...Ch. 8 - Investigate the adequacy of the bolts in the given...Ch. 8 - Design a four-bolt unstiffened end-plate...Ch. 8 - Design a four-both unstiffened end-plate...

Additional Engineering Textbook Solutions

Find more solutions based on key concepts
Show solutions add
There are many different types of capacitors, including ceramic, air, mica, paper, and electrolytic. Investigat...

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

Name and describe the most prevalent characteristics of cloud computing services.

Database Systems: Design, Implementation, & Management

A three-function combination valve has a brake system failure switch, a valve.

Automotive Technology: A Systems Approach (MindTap Course List)

What is the TPI of a -20 thread?

Precision Machining Technology (MindTap Course List)

What is an assistive technology system?

Principles of Information Systems (MindTap Course List)

Implementing Biometric Security You are the chief technology officer of a large company. You have been reading ...

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)

Only one _____ exists on a network using STP.

Network+ Guide to Networks (MindTap Course List)

How does a welding transformer work?

Welding: Principles and Applications (MindTap Course List)

If your motherboard supports ECC DDR3 memory, can you substitute non-ECC DDR3 memory?

A+ Guide to Hardware (Standalone Book) (MindTap Course List)