A three-span continuous one-way slab with clear spans of 3.5 meters and thickness of 125mm is supported on beams 300 mm wide (monolithic construction). Effective depth of the slab is 99mm. The slab carries a floor live load of 2.4 kPa and a superimposed dead load of 1.5kPa. Use f'c = 21 MPa and fy = 275 MPa. Unit weight of concrete 24 kN/m3. For moment calculation, refer to RC-04. Use 2010 NSCP. Considering exterior panel: a. Calculate the maximum negative moment considering a 1 m strip. b. Calculate the maximum positive moment considering a 1 m strip. c. Calculate the spacing of 12mm@ main reinforcing bars for negative bending. d. Calculate the spacing of 12mm main reinforcing bars for positive bending. e. Find the spacing of 10mm temperature bars.

A three-span continuous one-way slab with clear spans of 3.5 meters and thickness of 125mm is supported on beams 300 mm wide (monolithic construction). Effective depth of the slab is 99mm. The slab carries a floor live load of 2.4 kPa and a superimposed dead load of 1.5kPa. Use f'c = 21 MPa and fy = 275 MPa. Unit weight of concrete 24 kN/m3. For moment calculation, refer to RC-04. Use 2010 NSCP. Considering exterior panel: a. Calculate the maximum negative moment considering a 1 m strip. b. Calculate the maximum positive moment considering a 1 m strip. c. Calculate the spacing of 12mm@ main reinforcing bars for negative bending. d. Calculate the spacing of 12mm main reinforcing bars for positive bending. e. Find the spacing of 10mm temperature bars.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

A three-span continuous one-way slab with clear spans of 3.5 meters and thickness of
125mm is supported on beams 300 mm wide (monolithic construction). Effective depth of
the slab is 99mm. The slab carries a floor live load of 2.4 kPa and a superimposed dead load
of 1.5kPa. Use f'c = 21 MPa and fy = 275 MPa. Unit weight of concrete 24 kN/m3. For
moment calculation, refer to RC-04. Use 2010 NSCP. Considering exterior panel:
a. Calculate the maximum negative moment considering a 1 m strip.
b. Calculate the maximum positive moment considering a 1 m strip.
c. Calculate the spacing of 12mm@ main reinforcing bars for negative bending.
d. Calculate the spacing of 12mm@ main reinforcing bars for positive bending.
e. Find the spacing of 10mm temperature bars.

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Step 4: Maximum negative moment

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Step 5: Max positive moment

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