Abstract
AbstractThe friction behavior of mortar–polymer–steel debonding interfaces was experimentally investigated to support numerical simulation of buckling-restrained braces (BRBs). Characteristic conta...
Highlights
Buckling-restrained braces (BRBs) are seismic devices composed of a tapered, energy-dissipating steel core encased in an axially decoupled restrainer, which is separated by a debonding interface
In a typical construction of mortar-filled steel-tube BRBs, which are widely used in practice, the debonding material is first attached to the core plate before placing the core in the steel tube and casting the mortar, which imposes a small hydrostatic pressure on the order of 0.05–0.5 MPa and bonds to the debonding material
A bare steel-mortar specimen (N-1) of Interface type IV was tested as a control
Summary
Buckling-restrained braces (BRBs) are seismic devices composed of a tapered, energy-dissipating steel core encased in an axially decoupled restrainer, which is separated by a debonding interface. The debonding interface serves two purposes: to create a gap that accommodates compressive Poisson expansion of the yielded core and reduce friction at wavecrests that form as the core undergoes small-amplitude higher-mode buckling during compression halfcycles In a typical construction of mortar-filled steel-tube BRBs, which are widely used in practice, the debonding material is first attached to the core plate before placing the core in the steel tube and casting the mortar, which imposes a small hydrostatic pressure on the order of 0.05–0.5 MPa and bonds to the debonding material For this type of BRB, good performance has been achieved using a soft, thin film of butyl, chloroprene, or silicon rubber (Chen et al 2016; Guo et al 2017; Iwata et al 2000; Tsai et al 2014). Despite extensive device-level testing (Black et al 2004; Tsai et al 2014), there are few to no direct friction data for these Interface type I materials under the unique sliding conditions experienced in BRBs
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
