A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
15.12: On imperfection‐sensitivity evaluation of BMRF systems: Buckling and post‐buckling responses
Sensitivities of the buckling and post‐buckling responses of braced moment resisting frame (BMRF) systems to initial imperfections in their gusset‐brace sub‐systems are studied. Previously, the effects of imperfection amplitude and type have not been evaluated in requisite detail, and only a general recommendation—which is given as a function of the bracing element's length—has been utilized. Here, highly detailed (centimeter scale) three‐dimensional finite element models are employed in parametric sensitivity analyses to quantify the effects of imperfections on the responses of BMRFs with diagonal and X‐bracing subsystems. The results are discussed and amendments are proposed to the existing empirical equations for evaluating the buckling and post‐buckling capacities of imperfect bracings. The parametric studies showed that while an increase in the imperfection amplitude can dramatically decrease the initial buckling load of BMRFs, this causes only moderate decreases in their post‐buckling strengths, and their ultimate states remain nearly unaltered.
15.12: On imperfection‐sensitivity evaluation of BMRF systems: Buckling and post‐buckling responses
Sensitivities of the buckling and post‐buckling responses of braced moment resisting frame (BMRF) systems to initial imperfections in their gusset‐brace sub‐systems are studied. Previously, the effects of imperfection amplitude and type have not been evaluated in requisite detail, and only a general recommendation—which is given as a function of the bracing element's length—has been utilized. Here, highly detailed (centimeter scale) three‐dimensional finite element models are employed in parametric sensitivity analyses to quantify the effects of imperfections on the responses of BMRFs with diagonal and X‐bracing subsystems. The results are discussed and amendments are proposed to the existing empirical equations for evaluating the buckling and post‐buckling capacities of imperfect bracings. The parametric studies showed that while an increase in the imperfection amplitude can dramatically decrease the initial buckling load of BMRFs, this causes only moderate decreases in their post‐buckling strengths, and their ultimate states remain nearly unaltered.
15.12: On imperfection‐sensitivity evaluation of BMRF systems: Buckling and post‐buckling responses
Lotfollahi, Mehrdad (author) / Alinia, Mohamad Mehdi (author) / Taciroglu, Ertugrul (author)
ce/papers ; 1 ; 3980-3989
2017-09-01
10 pages
Article (Journal)
Electronic Resource
English
POST-BUCKLING BEHAVIOR AND IMPERFECTION SENSITIVITY OF L-FRAMES
| Online Contents | 2005
Imperfection sensitivity of post-buckling of FML channel section column
| Elsevier | 2017
Imperfection sensitivity of post-buckling of FML channel section column
| Online Contents | 2017
Pre-buckling imperfection sensitivity of pultruded FRP profiles
| British Library Online Contents | 2015
Pre-buckling imperfection sensitivity of pultruded FRP profiles
| Tema Archive | 2015