Download Design of Reinforced Concrete Foundations by P. C. Varghese PDF

By P. C. Varghese

It explains step by step process for the layout of every kind of beginning with assistance from a lot of worked-out examples. The ebook presents an in-depth research of subject matters, similar to wall footings, balanced footings, raft foundations, beam and slab rafts, pile caps and pile foundations.

KEY FEATURES

Explains IS Codes at the subject.
Presentation of the e-book is lecture-based, with each one bankruptcy facing one subject. This is helping the academics of their lectures.
Deals with sleek options in addition to empirical procedure.
Devotes a separate bankruptcy to the results of earthquakes on foundations.
Has a number of diagrams to demonstrate the recommendations discussed.
The ebook is designed as a textbook for the undergraduate and postgraduate scholars (Structural/Geotechnical) of Civil Engineering. because the ebook offers with either the basics of the topic and box perform, practicing engineers also will locate the ebook very beneficial.

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Additional info for Design of Reinforced Concrete Foundations

Example text

In order to get a liberal value for depth, we assume it is resisted by the column face line only. 1. 5a) Similarly, Myy - 24 LB {IB + b){L - a) Design of Centrally Loaded Isolated Footings and Column Pedestals 41 In both cases, the moment is to be resisted by the dimensions a and b respectively at the base of the column. 6) [Note: We assume that the column dimensions a and b only resist the bending. ] Method (c): As the first method gives very conservative results, some designers use method (a) for the calculation of moments but assume that the moment is resisted by an effective breadth larger than that of the dimension at the column base.

24 IS 456 Provisions for Design of Footings and Pedestals 25 safe bearing capacity is obtained (from the principles of soil mechanics) by dividing the ultimate capacity of the soil by a suitable factor of safety, its value represents the serviceability condition, and not the limit state condition. Accordingly, the loads to be used to determine the size of the foundation should he the service loads, and not the factored loads. The three combinations of loads to be used are as follows: 1. Dead + imposed loads 2.

Both these approaches are found to give safe values for design, especially in footings. 2 Bending Moment for Design We must find the steel for bending. IS 456, CI. 3 states that the bending moment to be taken for design of footings is the moment of the reaction forces due to the applied load (excluding the weight of the foundation itself) at the following sections: 1. 2(a). 2. Half-way between the centre line and the edge of the wall for footings under masonry walls. 3. Half-way between the face of the column and the edge of the gusseted base for footings under gusseted bases.

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