A SIMPLIFIED METHOD TO ESTIMATE THE FUNDAMENTAL FREQUENCY OF SKEW CONTINUOUS MULTICELL BOX-GIRDER BRIDGES

Authors

  • IMAN MOHSENI DEPARTMENT OF CIVIL ENGINEERING, BEHBAHAN BRANCH, ISLAMIC AZAD UNIVERSITY, BEHBAHAN, IRAN
  • ABDUL KHALIM ABDUL RASHID DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITI KEBANGSAAN MALAYSIA (NATIONAL UNIVERSITY OF MALAYSIA), 43600, UKM, BANGI, SELANGOR D.E., MALAYSIA.
  • JUNSUK KANG DEPARTMENT OF CONSTRUCTION MANAGEMENT AND CIVIL ENGINEERING, GEORGIA SOUTHERN UNIVERSITY, PO BOX 8047, 6611 FOREST DRIVE, STATESBORO, GA 30460-8047

Keywords:

FUNDAMENTAL FREQUENCY, SKEW ANGLE, BOX-GIRDER BRIDGES

Abstract

 

THE FUNDAMENTAL FREQUENCY IS THE MAIN FACTOR USED TO CALCULATE THE VIBRATION OF A VEHICLE WHEN PASSING ACROSS A BRIDGE. WITH KNOWLEDGE OF THE FUNDAMENTAL FREQUENCY, BRIDGES CAN BE EVALUATED AND DESIGNED IN SUCH A MANNER SO AS TO AVOID THE CRITICAL RANGE OF 1.5 HZ TO 4.5 HZ, WHICH IS OCCUPIED BY MOST VEHICLES. THEREFORE IT IS CRUCIAL TO DEVELOP A RELIABLE METHOD TO ESTIMATE THE FUNDAMENTAL FREQUENCY OF BRIDGES. TO OVERCOME THE ABOVE ISSUE, NUMERICAL ANALYSIS COMBINED WITH A THEORETICAL METHOD IS APPLIED TO ESTIMATE THE FUNDAMENTAL FREQUENCY OF MULTICELL BOX-GIRDER BRIDGES. THE EFFECT OF SPAN-LENGTH, NUMBER OF BOXES AND SKEW ANGLE ON THE ESTIMATION OF THIS FACTOR IS DISCUSSED. FINALLY, RELIABLE EXPRESSIONS ARE PROPOSED TO PREDICT THE FIRST FUNDAMENTAL FREQUENCY OF THIS TYPE OF BRIDGE, AND THE ACCURACY OF THE EXPRESSIONS ARE VERIFIED.

Author Biographies

IMAN MOHSENI, DEPARTMENT OF CIVIL ENGINEERING, BEHBAHAN BRANCH, ISLAMIC AZAD UNIVERSITY, BEHBAHAN, IRAN

MEMBER OF FACULTY, DEPARTMENT OF CIVIL ENGINEERING

ABDUL KHALIM ABDUL RASHID, DEPARTMENT OF CIVIL ENGINEERING, UNIVERSITI KEBANGSAAN MALAYSIA (NATIONAL UNIVERSITY OF MALAYSIA), 43600, UKM, BANGI, SELANGOR D.E., MALAYSIA.

PROFESSOR

JUNSUK KANG, DEPARTMENT OF CONSTRUCTION MANAGEMENT AND CIVIL ENGINEERING, GEORGIA SOUTHERN UNIVERSITY, PO BOX 8047, 6611 FOREST DRIVE, STATESBORO, GA 30460-8047

ASSOCIATE PROFESSOR

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Published

2013-10-23

Issue

Vol. 11 No. 4 (2014)

Section

Articles

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