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Investigating the Behavior of Vertical Stiffeners' Bolted Connections to the Wall of Steel Corrugated Silos

Seyedsharifi, Sama | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57844 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Moazezi Mehretehran, Alireza
  7. Abstract:
  8. In this study, the bolted connection of two steel corrugated plates, commonly found in silo walls, was investigated. Following the validation of FEM models, the test design described in AISI S905 for cold-formed steel bolted connections was referenced. The geometry of the corrugated plates was selected in accordance with ASTM A796. The effects of various parameters, including plate thickness, bolt diameter, steel type, bolt placement, wave geometry, and restrained curling, were analyzed with respect to the bearing capacity of the connections. Based on the analysis, the most significant parameters were identified, and 54 additional models were developed to further investigate the interaction of these parameters. The results were compared with the values predicted by AISI S100 and EC3 standards, and a new equation based on the dtFu parameter was proposed to estimate the bearing capacity of these connections. In addition, a qualitative analysis was conducted on the connection of vertical stiffeners to the corrugated walls of a silo. To examine the effect of corrugation, two connection specimens, one with a flat plate and the other with a corrugated plate, both connected with two bolts, were analyzed. The maximum loads these specimens could carry before failure were compared with the values predicted by the AISI S100 and EC3 design standards in their limit state. To simulate the internal pressure of stored grains in a silo, two-bolted corrugated samples were analyzed, one with out-of-plane displacement restrained (representing a filled silo) and the other without restraint (representing an empty silo). Furthermore, the effect of the number of bolts on load capacity was examined using connections with 2, 4, and 8 bolts. The results demonstrated that increasing the number of bolts led to a nonlinear increase in the load capacity per bolt, improving the overall efficiency of the connections
  9. Keywords:
  10. Bolted Connection ; Cold Formed Steel ; Finite Element Modeling ; Euro Codes ; Steel Corrugated Silos ; Cold Formed Structures

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