کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
267499 504403 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and experimental validation of a nickel–titanium shape memory alloy self-centering buckling-restrained brace
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Development and experimental validation of a nickel–titanium shape memory alloy self-centering buckling-restrained brace
چکیده انگلیسی

Buildings designed with conventional ductile earthquake-resisting structural systems are expected to provide life safety performance, but they rely on significant structural damage to dissipate the seismic energy. This structural damage and the residual drift that may result from the inelastic response can make a building difficult, if not financially unreasonable, to repair after an earthquake. As a result, development of systems that dissipate energy, minimize structural damage, and return to their initial position (“self-center”) following an earthquake is needed. This paper presents a viable solution including experimental investigation of the cyclic behavior and performance of a self-centering buckling-restrained brace (SC-BRB). A SC-BRB consists of a typical BRB component, which provides energy dissipation, and pre-tensioned superelastic nickel–titanium (NiTi) shape memory alloy (SMA) rods, which provide self-centering and additional energy dissipation. The SMA rods are attached to the BRB portion of the brace using a set of concentric tubes and free-floating end plates that cause the SMA rods to elongate when the brace is in both tension and compression. Large-scale SC-BRBs were designed, fabricated and tested using a cyclic protocol to validate the brace concept. The experimental program demonstrated that NiTi SMA SC-BRBs provide stable hysteretic response with appreciable energy dissipation, self-centering ability, and large maximum and cumulative deformation capacities.


► A buckling-restrained brace with NiTi shape memory alloy was investigated.
► NiTi shape memory alloy tests examine effects of heat treatment and machining.
► Two large-scale braces exhibit robust behavior and significant self-centering.
► The prototype braces provide a basis for studying implementation in systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 40, July 2012, Pages 288–298
نویسندگان
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