The Effects of Steel Core Imperfection, Gap Size and Friction Coefficient on the Behavior of All-Steel Buckling Restrained Braces
نویسندگان
چکیده
Buckling restrained braces (BRBs) which are generally composed of a steel core and encasing(buckling restrainers) utilized to resist lateral forces in high seismic regions since BRBs exhibit energy dissipation capacity, ductility stiffness. The carries both compressive tensile forces. During the compression, starts buckling encasing tries prevent this buckling. However, due unbonding layer/gap between core, eventually buckles contacts with encasing. phenomenon is also associated initial imperfection gap size. In study, effects imperfectionof size (1-5 mm)and friction coefficient (0.01-0.5)between on behavior investigated. Pursuant goal, numerical analyses using finite element tool ABAQUS were conducted. A total 19 models developed monotonically loaded. Initial was implemented mode shapes.The results revealed that increasing leads reduction load-carrying capacity. It recommended keep sizes 1 2 mm. On other hand, does not significantly affect capacity global behavior. it observed fluctuations load increase as amplitude shape increase. Moreover, should be kept 0.01 0.05; otherwise, undesired behaviors can observed.
منابع مشابه
the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...
Effect of surface roughness on steel-steel dry friction coefficient
The influence of surface roughness magnitude and direction on dry static friction coefficient between two similar steel samples has been studied through an experiment. A testing apparatus has been designed and fabricated to measure the friction coefficient for a few forms of surface asperity. According to the results of the experiments, dry friction coefficient is affected by both magnitude and...
متن کاملon the effects of pictorial clues on the efl learners listening comprehension development
the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...
15 صفحه اولthe effects of previewing and providing background knowledge on iranian university efl learners’ comprehension of literary and academic texts
abstract poor reading comprehension can result in failure in using references, benefiting from professional gatherings and resources, keeping up with the growing body of knowledge in the virtual world of the internet, and failing to achieve in efl programs. the purpose of the present quasi-experimental study was to explore the effects of background knowledge and previewing narrative and expos...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Düzce Üniversitesi bilim ve teknoloji dergisi
سال: 2021
ISSN: ['2148-2446']
DOI: https://doi.org/10.29130/dubited.843214