Week 5 Challenge

AIM-: 1. Calculate loads manually acting on pier foundation and design as per IRC 6,78 and 112

Detailing of the foundation reinforcement.

Ans-: INTRODUCTION

BASIC DESIGN DATA

SOIL DATA

LOAD DATA

SUB-STRUCTURE

LOAD CALCULATION

LIVE LOAD CALCULATION

SUBSTRUCTURE WEIGHT

WIND FORCE CALCULATION

BASE PRESSURE CHECK

LOAD COMBINATION

DESIGN OF FOUNDATION

STRESS CALCULATION IN CONCRETE

2. what is difference between free and fix pier and how it impacts the foundation size.

Also add the calculation of loading in both the cases.

ANS-:Bridge Pier support the spans of the bridge and transfer the loads from superstructure to the foundation. Piers should be strong enough to take the both vertical and horizontal load. Its main function is to transfer the load from the bridge superstructure foundation below it. They are subjected to huge axial loads and biaxial moments and shear forces in transverse and longitudinal direction. Said that, pier are usually compression elements of a bridge.

free pier	fix pier
free piers transfer only axial forces from the bearing to the foundations.	Fixed piers are subject to transverse and longitudinal forces.
In case of free pier transfer of axial forces only happens and movement in longitudinal direction is allowed and hence there is no longitudinal reactions.	In fixed pier, rotation and lateral movements are resisted and hence large amount of transverse and longitudinal moments occur.
Because of less horizontal force, the size of the foundation is considerably less to the fixed pier.	The size of the foundation of the fixed pier is large comparatively to accommodate the heavy forces.

4. List all RCC design checks to be done in the ultimate state and serviceability state for a cracked section as per IRC codes and mention clauses

ans-: