1. 1 Research Scholar, Department of Civil Engineering , Acharya Nagarjuna University , Guntur (Dist.), Andhra Pradesh, 522510 , India .
2. 2 Department of Civil Engineering , Velagapudi Rama Krishna Siddhartha Engineering College , Kanuru, Andhra Pradesh, 520007 , India .
3. 3 Department of Civil Engineering , Bapatla Engineering College , Bapatla, Andhra Pradesh, 522101 , India .