LIFE CYCLE INTEGRITY ISSUES OF A LARGE RC STRUCTURE IN A PETROCHEMICAL FACILITY
Large engineering structures in petrochemical installations are sometimes subjected to dynamic excitations which are not necessarily anticipated in design. The structures when subjected to cyclic dynamic loadings become an issue of potential concern when physical evidence shows cracks in structural members. Under such circumstances life cycle integrity assessment and mitigating measures becomes necessary. This paper presents a case study of a large reinforced structure housing a vertical polymerization/pre-polymerization rector in a petrochemical plant subjected to dynamic excitation from process induced vibrations. Dynamic amplification of the structure occurred as a result of resonant excitation from the cyclones. Issues related to continuing safe operations of the facility had to be addressed requiring a structural integrity assessment of the RC structure. An overview of the due process in determining severity and nature of the problem, and life assessment of the structure are presented. The measures included comprehensive vibration measurements to identify nature of the problem, root cause of the source of the vibration excitation, and structural evaluation of the structure. The exercise required finite element analysis of the structure to determine likely dynamic stresses in the structure and assessed against corresponding Euro Codes. Life predictions of the RC structure proved to be challenging as methodologies used had to be adapted from proven practice in offshore steel structures.
Structural vibrations Integrity assessment Resonant excitation RC structure.
Goh TK Tiong HC Mutalib Shafiai A Salman Leong M
Group Technology Solutions, PETRONAS, Menara Dayabumi, Kuala Lumpur 50050, Malaysia Polyethylene Ethylene (Malaysia) Sdn Bhd, Kerteh 24300, Terengganu, Malaysia Institute of Noise & Vibration, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia
国际会议
北京
英文
535-542
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）