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Local behavior of column-tree connections with considering bolt-hole clearance and bolt pretension effects

Local behavior of column-tree connections with considering bolt-hole clearance and bolt... Abstract In this paper, effects of bolt-hole clearance and bolt pretension level on seismic performance of column-tree moment resisting frames with reduced beam section have been investigated. In a typical constructional environment, manufacturing tolerances and field situations cause inappropriate positioning of bolts in their corresponding holes in bolted connections, so bolt-hole diameter increases by incorrect methods like acetylene gas cutting method. On the other hand, nonlinear local behavior of the connection elements and effects of dynamic friction during the process of applying the bolt pretension cause wrong evaluation of bolt pretension level. In order to investigate these problems, models of column-tree connections with various bolt-hole clearances and bolt pretension levels subjected to cyclic loading were developed and analyzed with 3D FEM and their hysteresis curves were obtained and evaluated. Results show that bolt-hole clearance can reduce the flexural capacity of column-tree connections especially along with reduction in the bolt pretension level while interstory drift angle increases during inelastic cycles. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "International Journal of Steel Structures" Springer Journals

Local behavior of column-tree connections with considering bolt-hole clearance and bolt pretension effects

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References (26)

Publisher
Springer Journals
Copyright
2017 Korean Society of Steel Construction and Springer-Verlag GmbH Germany
ISSN
1598-2351
eISSN
2093-6311
DOI
10.1007/s13296-017-6002-z
Publisher site
See Article on Publisher Site

Abstract

Abstract In this paper, effects of bolt-hole clearance and bolt pretension level on seismic performance of column-tree moment resisting frames with reduced beam section have been investigated. In a typical constructional environment, manufacturing tolerances and field situations cause inappropriate positioning of bolts in their corresponding holes in bolted connections, so bolt-hole diameter increases by incorrect methods like acetylene gas cutting method. On the other hand, nonlinear local behavior of the connection elements and effects of dynamic friction during the process of applying the bolt pretension cause wrong evaluation of bolt pretension level. In order to investigate these problems, models of column-tree connections with various bolt-hole clearances and bolt pretension levels subjected to cyclic loading were developed and analyzed with 3D FEM and their hysteresis curves were obtained and evaluated. Results show that bolt-hole clearance can reduce the flexural capacity of column-tree connections especially along with reduction in the bolt pretension level while interstory drift angle increases during inelastic cycles.

Journal

"International Journal of Steel Structures"Springer Journals

Published: Jun 1, 2017

Keywords: Civil Engineering; Solid Mechanics; Materials Science, general

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