ASSESSMENT OF ECCENTRIC BRACE EFFECT ON STEEL STRUCTURES PERFORMANCE AND ITS COMPARISON WITH MOMENT FRAME SYSTEM IN PROGRESSIVE COLLAPSE PHENOMENON

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NAGHIPOUR M.; SOJOUDI TOUSERVANDANI B.

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Journal: Modares Civil Engineering journal Year:2016 | Volume:16 | Issue:3 Page(s): 241-252

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Information Journal Paper

Title

ASSESSMENT OF ECCENTRIC BRACE EFFECT ON STEEL STRUCTURES PERFORMANCE AND ITS COMPARISON WITH MOMENT FRAME SYSTEM IN PROGRESSIVE COLLAPSE PHENOMENON

Author(s)

NAGHIPOUR M. | SOJOUDI TOUSERVANDANI B. | Issue Writer Certificate

Keywords

PROGRESSIVE COLLAPSEQ1

NONLINEAR DYNAMIC PROCEDUREQ2

ECCENTRIC BRACEQ2

MOMENT FRAMEQ2

ALTERNATE PATH METHODQ1

Abstract

Structural safety in the design of civil engineering projects has always been significantly important for engineers. One of the failure mechanisms of structures which is recently attended is PROGRESSIVE COLLAPSE. PROGRESSIVE COLLAPSE of structures during earthquakes and even explosions near the construction has become a major challenge, creating problems for structures, and may even lead to the destruction of the entire structure. PROGRESSIVE COLLAPSE is defined as extension of primary local failure from an element to another element that finally collapses the entire structure or a major part of it. Potential hazards that cause PROGRESSIVE COLLAPSE are fires, gas explosions, accidents, bombs etc. the purpose of this paper is to investigate PROGRESSIVE COLLAPSE in steel structures with centrically braced frames, and the influence of parameters such as height, bracing arrangement and type of structural system. In this study, the PROGRESSIVE COLLAPSE due to column removal in steel centrically braced frames that are designed seismically according to Iranian guidelines is analyzed using ALTERNATE PATH METHOD and nonlinear dynamic analysis. Also, the PROGRESSIVE COLLAPSE due to column and brace removal is simultaneously analyzed in steel centrically braced frames. The analysis of the PROGRESSIVE COLLAPSE in MOMENT FRAME and the comparison of it with centrically braced frames will also be carried out. For this purpose, two five- and ten-story structures with braces in the middle spans, and also two five- and ten-story structures with braces in lateral spans were analyzed using ETABS program. One of the five-story structures was with system of MOMENT FRAMEs and the other one with a combinational system of MOMENT FRAMEs centrically braced. Thereafter, the PROGRESSIVE COLLAPSE was modeled in SAP2000 program for one of the structures with outside frames. Results showed that the removal of a single column only when there is no brace beside the removed column, and also simultaneous removal of columns and braces only in the last floor cause PROGRESSIVE COLLAPSE of the structure. Also, the probability of PROGRESSIVE COLLAPSE with simultaneous removal of columns and braces will increase when the height of the frames centrically braced increases, and will decrease when the height of the frames laterally braced increases. Also the comparison of centrically braced frames with MOMENT FRAMEs showed that centrically braced frames are more resistant to the PROGRESSIVE COLLAPSE than the MOMENT FRAMEs. However, combinational system of MOMENT FRAMEs and centrically braced ones in comparison with the other analyzed systems is the most resistant system to PROGRESSIVE COLLAPSE.

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APA: Copy

NAGHIPOUR, M., & SOJOUDI TOUSERVANDANI, B.. (2016). ASSESSMENT OF ECCENTRIC BRACE EFFECT ON STEEL STRUCTURES PERFORMANCE AND ITS COMPARISON WITH MOMENT FRAME SYSTEM IN PROGRESSIVE COLLAPSE PHENOMENON. MODARES CIVIL ENGINEERING JOURNAL, 16(3), 241-252. SID. https://sid.ir/paper/256676/en

Vancouver: Copy

NAGHIPOUR M., SOJOUDI TOUSERVANDANI B.. ASSESSMENT OF ECCENTRIC BRACE EFFECT ON STEEL STRUCTURES PERFORMANCE AND ITS COMPARISON WITH MOMENT FRAME SYSTEM IN PROGRESSIVE COLLAPSE PHENOMENON. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2016;16(3):241-252. Available from: https://sid.ir/paper/256676/en

IEEE: Copy

M. NAGHIPOUR, and B. SOJOUDI TOUSERVANDANI, “ASSESSMENT OF ECCENTRIC BRACE EFFECT ON STEEL STRUCTURES PERFORMANCE AND ITS COMPARISON WITH MOMENT FRAME SYSTEM IN PROGRESSIVE COLLAPSE PHENOMENON,” MODARES CIVIL ENGINEERING JOURNAL, vol. 16, no. 3, pp. 241–252, 2016, [Online]. Available: https://sid.ir/paper/256676/en

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