A precast slab was employed for the floor of a building. The thickness andwidth of slab are 80 mm and 0.8 m, respectively. The effective span (or calculationspan) is 3.0 m. 20 mm thick cement mortar and 10 mm thick lime were employed onthe top and bottom of the slab, respectively. The density of concrete, cement mortarand lime are 25 kN/m, 20 kN/m and 16 kN/m', respectively. Coefficient of structuralimportance is 1.0. The standard value of live load is 2.0 kN/m2.Requirement: (1) determine the uniform standard value of dead load gx and standardvalue of live load q. (the unit is kN/m).(2) determine the design value of bending moment at mid-span of the slab M (Theload factors for dead load and live load are 1.3 and 1.5, respectively).

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A precast slab was employed for the floor of a building. The thickness and width of slab are 80 mm and 0.8 m, respectively. The effective span (or calculation span) is 3.0 m. 20 mm thick cement mortar and 10 mm thick lime were employed on the top and bottom of the slab, respectively. The density of concrete, cement mortar and lime are 25 kN/m', 20 kN/m³ and 16 kN/m', respectively. Coefficient of structural importance is 1.0. The standard value of live load is 2.0 kN/m2. Requirement: (1) determine the uniform standard value of dead load ga and standard value of live load q (the unit is kN/m). (2) determine the design value of bending moment at mid-span of the slab M (The load factors for dead load and live load are 1.3 and 1.5, respectively).

A precast slab was employed for the floor of a building. The thickness and width of slab are 80 mm and 0.8 m, respectively. The effective span (or calculation span) is 3.0 m. 20 mm thick cement mortar and 10 mm thick lime were employed on the top and bottom of the slab, respectively. The density of concrete, cement mortar and lime are 25 kN/m', 20 kN/m³ and 16 kN/m', respectively. Coefficient of structural importance is 1.0. The standard value of live load is 2.0 kN/m2. Requirement: (1) determine the uniform standard value of dead load ga and standard value of live load q (the unit is kN/m). (2) determine the design value of bending moment at mid-span of the slab M (The load factors for dead load and live load are 1.3 and 1.5, respectively).

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

Crack Detection

Concrete materials are meant for supporting structures, building foundations and they act as several load-bearing structures. Over time, due to environmental conditions, and based on the constituent materials used, concrete materials are subjected to a great degree of distress. Corrosion of the reinforcement bars due to chemical influences, uneven base, earthquake, drying shrinkages, and alkali-aggregate reactions are some of the reasons for concrete distress.

Question

A precast slab was employed for the floor of a building. The thickness and
width of slab are 80 mm and 0.8 m, respectively. The effective span (or calculation
span) is 3.0 m. 20 mm thick cement mortar and 10 mm thick lime were employed on
the top and bottom of the slab, respectively. The density of concrete, cement mortar
and lime are 25 kN/m, 20 kN/m and 16 kN/m', respectively. Coefficient of structural
importance is 1.0. The standard value of live load is 2.0 kN/m2.
Requirement: (1) determine the uniform standard value of dead load gx and standard
value of live load q. (the unit is kN/m).
(2) determine the design value of bending moment at mid-span of the slab M (The
load factors for dead load and live load are 1.3 and 1.5, respectively).

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