Week 11 Challenge

AIM : APPLICATION OF TEMPERATURE LOAD FOR RC BRIDGE CONSTUCTED IN DELHI AND ANALYSIS USING STAADPRO

INTRODUCTION :

• The bridge span with 9m span and having 2 no of piers havintg height of 10m
• The bridge span loaded on the box girder and trapexoidal beams
• Width of deck slab is 7m

MANUAL CALCULATION :

GIVEN :

• Max temperature in location as per IRC6 isothern at location : 47.5 degree
• Min temperature in location as per IRC6 isothern at location: -2.5 degree

EFFECTIVE TEMP. DIFFERENCE :

• (47.5)-(-2.5)
• 35 DEGREE

STRESS DUE TO TEMP. :

• α X δt X E
• 11.7X10^-6 X 35 X 5000`root`40
• 12.94 Kn/m2

MAX PERMISSIBLE STRESS :

• (2/3) x 0.7 xROOT 40
• 2.95kN/m2

THE STRESS ARE RESTRICTED TO 3KN/M2

POSITIVE TEMP. DIFFERENCE :

• TEMP. AT TOP = 47.5 DEGREE
• TEMP. AT BOTTOM= (2.1/7.8) 47.5
• 12.78C

THE TEMP. VARIATION APPLIED AS LOADING IN STAADPRO

PROCEDURE :

STEP 1: MODEL MAKING :

• Open staadpro create a new file with define its location
• Add a node at 0 and copy it using translational repeat in x direction at 9m span distance
• Add a beam between this node and copy both nodes in Y direction at a 10m distance and add a beam between this nodes
• copy above beam in z direction at a distance of 3.5m and -3.5m and joint using beam

• To add a plate select a corner node and copy it in z direction at a distance of 0.5m and same procedure in X direction
• Add plate between this nodes and select created plate and copy in z direction 13 steps at adistance 0.5m
• Select all the plate and copy in X direction 17 steps at a 0.5m direction

• Click on specification and add a fixed support
• Select bottom nodes and assign the support to this nodes

STEP2 : PROPERTIES :

• Click on the properties and define a property of circular concrete beam of 2.5 m
• Select the piers and assign this property to the piers

• Add a new property for box girders as per question and assign this property to the girders

• Add a new property of concrte for the pier cap as per question and select the corner cross beams and assign the property to the pier cap

• Add a new property of plate thickness of 0.55m as per question and select all the plates and assign the property to the deck slab

• Now all the properties are applied to the structure

STEP 3 : LOADING

• Add a load case named as temperature load
• Define a load as per below

• After adding a laod assige the load to the view
• then the temperature load will apllied successfully

• 

STEP 4 : ANALYSIS

• Click on Analysis and Design and add a command perform analysis

• Click on run analysis the file will run

• Click on Go to Post Processing Mode
• Then you will see result

STEP 5 ; RESULTS

• DEFLECTION :

• BENDING MOMENT

• PIER RESULTS :

• PLATE RESULTS MY LOCAL

• PLATE RESULTS MX LOCAL