ce 318 structure analysis and design ii lab
TRANSCRIPT
CE 318STRUCTURE ANALYSIS AND DESIGN II LAB
LESSON 1BUILDING PLAN
SEMESTER: SUMMER 2021
COURSE TEACHER: SAURAV BARUA
CONTACT NO: +8801715334075
EMAIL: [email protected]
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INTRODUCTION
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In this course, we do structural design of a multistoried building.
This course requires knowledge on CE 315: Design of concrete
structure I, CE 317: Design of concrete structure II and CE 331:
Geotechnical Engineering II
COURSE CONTENT
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Design of RCC slab
Load calculation of beam
Design of beam
Load calculation and design of column
Pile cap layout and design of pile cap
Design of OHWT
MARKS DISTRIBUTION
Marks
Attendance 10
Class performance 25
Lab Report 15
Final Exam 50
Total 50
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LECTURE PLAN
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General Discussion on building design
Building plan and elevation
Construction material properties
Slab thickness and ACI codes
BUILDING PLAN
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BUILDING ELEVATION
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BUILDING INFORMATION
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• Concrete crushing strength, fc’ = 3000 psi = 3 ksi
• Steel yield strength, fy = 60000 psi = 60 ksi (60 grade steel)
• 6- storied building
• 3 span in X and Y direction
• Total building height = 60’ and each floor-ceiling height = 10’
MATERIALS INFORMATION
• Concrete crushing strength
For brick chips , fc’ = 3000 psi For stone chips , fc
’ = 4000 psi = 4 ksi
Steel yield strength, fy = 60 ksi (60 grade steel), fy = 40 ksi (40 grade steel) and fy = 75 ksi
(75grade steel),
• 500 W means steel is weld able (W) and yield strength 500 Mpa = 72.5 ksi
• TMT means thermo mechanically treated
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TWO WAY SLAB
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• Group same dimension slabs into one group. Here we have 6-slabs per floor.
• Here we have two types of slab, S1 16’x18’ and S2 16’x15’
• There is no cantilever portion
• All 6 slabs are two way slab.
• Since la/lb >0.5, la = shorter span, lb = longer span, so two way slab
• Otherwise it will be one way slab
ACI COEFFICIENT METHOD
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• We will use ACI coefficient method for slab design, which approved in BNBC 2015 code as well.
• Calculate Dead load (DL) moment and Live load (LL) moment.
• It consists with three tables.
• -ve moment coefficient
• +ve DL moment coefficient
• +ve LL moment coefficient
SLAB THICKNESS
• Thumb rule
Slab thickness = perimeter/180
Our largest slab = 16’x18’
So, taking the largest slab = 2x (16’+18’)x 12/180 = 4.53” ≈ 5”
Why choose largest slab think!!! We try to make slab thickness same for entire floor.
Minimum slab thickness for beam slab = 5”
And minimum slab thickness for flat slab = 7”
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SLAB OUTLINE
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