A NUMERICAL INVESTIGATION INTO ULTIMATE STRENGTH AND BUCKLING BEHAVIOR OF LOCALLY CORRODED STEEL TUBULAR MEMBERS

Authors

  • MASOUD NAZARI FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN
  • MOHAMMAD REZA KHEDMATI AMIRKABIR UNIVERSITY OF TECHNOLOGY
  • AMIR FOAD KHALAJ FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN,

Keywords:

TUBULAR MEMBER, LOCAL CORROSION, ULTIMATE STRENGTH, TUBULAR STEEL BRACING

Abstract

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THIS PAPER PRESENTS THE RESULTS OF A NUMERICAL INVESTIGATION INTO ULTIMATE STRENGTH OF LOCALLY CORRODED TUBULAR MEMBERS UNDER AXIAL COMPRESSIVE LOADS. A PARAMETRIC FINITE ELEMENT APPROACH WAS USED IN ORDER TO SIMULATE STRUCTURAL BEHAVIOR OF DAMAGED MEMBERS. THE RESULTS WERE THEN EXAMINED AGAINST AN AVAILABLE EXPERIMENTAL TEST. VALIDATED MODELS WERE USED TO DERIVE A SEMI-EMPIRICAL FORMULA FOR PREDICTING ULTIMATE STRENGTH OF LOCALLY DAMAGED TUBES AS A FUNCTION OF CORROSION DIMENSIONS. GEOMETRY OF CORROSION CAN BE DEFINED BY ITS DEPTH, LENGTH, WIDTH AND LOCATION OF DAMAGE ALONG THE TUBE. IN THIS STUDY IT IS FOCUSED ON THE EFFECT OF SOME PARAMETERS THAT HAVE NOT BEEN ADDRESSED YET BY OTHER RESEARCHERS, E.G. SLENDERNESS OF THE TUBES AND LOCATION OF PATCH CORROSION. IT WAS FOUND THAT LOCATION OF CORROSION HAS GREAT EFFECT ON REDUCTION OF ULTIMATE STRENGTH. EFFECT OF CORROSION GEOMETRY WAS STUDIED AND FORMULATED AS WELL AS TUBULAR SLENDERNESS AND IT WAS SHOWN THAT TUBES WITH DIFFERENT CORROSION DIMENSIONS SHOW DIFFERENT BEHAVIORS UNDER COMPRESSIVE LOADS. IN CASES WITH SEVERE CORROSION DAMAGES, THE OCCURRENCE OF LOCAL BUCKLING PLAYS AN IMPORTANT ROLE ON REDUCTION OF ULTIMATE STRENGTH AND DEFORMATION OF DAMAGED REGION.

Author Biographies

MASOUD NAZARI, FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN

PHD CANDIDATE AT

FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN

MOHAMMAD REZA KHEDMATI, AMIRKABIR UNIVERSITY OF TECHNOLOGY

϶ B.SC. IN CIVIL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN, 1985-1989.
϶ M.SC. IN NAVAL ARCHITECTURE, TECHNICAL UNIVERSITY OF GDANSK, GDANSK, POLAND, 1991-1993.
϶ DR.ENG. IN STRUCTURAL ENGINEERING, HIROSHIMA UNIVERSITY, HIGASHI-HIROSHIMA, JAPAN, 1997-2000.

+ ASSOCIATE PROFESSOR, FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN, (SINCE APRIL 2007)

+ ASSISTANT PROFESSOR, FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN, (OCT. 2000- APRIL 2007)

AMIR FOAD KHALAJ, FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN,

MSC GRADUATE AT

FACULTY OF MARINE TECHNOLOGY, AMIRKABIR UNIVERSITY OF TECHNOLOGY, 424 HAFEZ AVENUE, TEHRAN 15914, IRAN,

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Published

2014-01-20

Issue

Vol. 11 No. 6 (2014)

Section

Articles

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