Seismic Analysis and Design of the Internal Bridges PDF

COMPETENCY
DEMONSTRATION
REPORT
Career Episode 3
TANNAZ MAABI

CE 3.1 Project Information
Name of the project: Seismic Analyzing Bridges Including Soil-Abutment Interaction
Location of the project: [PLEASE FILL]
Project Duration: [PLEASE FILL]
Organization: [PLEASE FILL]
Role and Designation during the time: Team Member
CE 3.2 Project Background
CE 3.2.1 Characteristics of the project
I had investigated on the seismic analysis and design of the internal bridges in manner to
identify the effects of soil-abutment on it. It is an obvious factor that the interaction of the soil
structure has a crucial role in the bridge structures’ seismic response. I had supervised the project
and designed it considering the backfill soil participation at the abutments. I had executed a
design driven methodology for modelling the abutment stiffness for any of the non-linear or
linear analysis. This was executed considering the pier foundation, and backfill statistics of the
project. I had supervised the of a three-span bridge considering backfill stiffness reduction,
moments and force calculation. This project can be helpful in executing the bridge construction
and providing better approach towards the successful accomplishment of the project.

CE 3.2.2 Objectives developed for the project
I considered the importance of the execution of the project needs a proper layout and path
fort the execution of the activities involved in the project. I applied following objectives for the
whole team to accomplish the project constraints in effective manner:
 To identify the aspects affecting the bridge construction
 To supervise the project for managing the quality of the project
 To provide possible and beneficial directions on how to execute the project
 To execute the project without lacking in any factors
 To keep the budget less even delivering a high quality project
CE 3.2.3 My area of work
I had to monitor and supervise the project development of the bridge construction. I
modelled the backfill soil stiffness through using the formula Ks = Es / [(1-V2). I], where Ks is the
“soil stiffness per unit deflection per unit wall width”, Es is the backfill soil’s Young’s modulus,
v is the backfill soil’s poisson’s ratio, and I is the shape factor. I executed the mathematical
calculation for the identification of the vertical displacement of having the dimension of (a x b;
where ‘b’ is shorter than ‘a’) through the following formula:
δz = {(1 – v2) / Es}. pbI where p is describing the load per unit area of the rectangle.
I had been assigned in the phase of executing iterative analysis procedure that includes
three steps and further four sub-steps for the overall result as described in the following figure: