Lateral resistance of anchor-bolt joints between timber sills and foundations III: numerical simulations of the effect of sill thickness on the effective lateral resistance of multiple anchor-bolt joints |
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Authors: | Takuro Hirai Kayoko Namura Takeo Kimura Tetsuji Tsujino Akio Koizumi |
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Institution: | (1) Graduate School of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kitaku, Sapporo 060-8589, Japan;(2) Tostem Co. Ltd., Nagareyama 270-0163, Japan;(3) Minamifuji Sangyo Co. Ltd., Yokohama 224-0057, Japan;(4) Faculty of Education, Iwate University, Morioka 020-0066, Japan |
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Abstract: | Effective lateral resistance of multiple anchorbolt joints was estimated by considering sill thickness or length/diameter
ratios of anchor bolts. Load-slip relationships of single anchor bolt joints were analyzed by the stepwise linear approximation
based on the generalized theory of a beam on an elastic foundation and the criterion of “fracture bearing displacement” for
several sill thicknesses or length/diameter ratios of anchor bolts. Monte Carlo simulations of the effective lateral resistance
of multiple anchor-bolt joints were conducted using the analyzed load-slip curves of single anchor-bolt joints. Effective
resistance ratios of multiple anchor-bolt joints were simulated for some combinations of length/diameter ratios of anchor
bolts, lead-hole clearances, and number of anchor bolts. The simulated results are: (1) the influence of lead-hole clearance
becomes more apparent as length/diameter ratios of single anchor-bolt joints decrease; (2) there is no obvious effect of number
of anchor-bolts over the range of 5 to 15; (3) average effective resistance ratios can be adopted for allowable stress design;
and (4) reduction of effective resistance ratios should be considered particularly for small length/diameter ratios of anchor-bolt
joints. |
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Keywords: | Multiple anchor-bolt joints Effective lateral resistance Stepwise linear analysis Beam on foundation Monte Carlo simulation |
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