000018681 001__ 18681
000018681 005__ 20170118182236.0
000018681 04107 $$aeng
000018681 046__ $$k2017-01-09
000018681 100__ $$aThammarak, Punchet
000018681 24500 $$aCam-Type Compression Free Device for Energy Dissipative Brace System

000018681 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018681 260__ $$b
000018681 506__ $$arestricted
000018681 520__ $$2eng$$aA newly developed hysteretic-type energy dissipative brace for suppression of structural responses under earthquake ground motions, namely Compression-Free Braces (CFBs), is introduced herein. Resembling to Buckling Restrained Braces (BRBs), CFBs transform kinetic energy in buildings under earthquake into plastic strain energy in a mild steel core. However, in contrast with BRBs, the energy dissipation in a steel core in CFBs occurs only under tension whereas zerostiffness and zero-resistance behavior occurs under compression as a result of compression-free mechanism. Two rotary cams, pinned to the body of CFBs, are used to grip a mild steel core by friction force only under tension and disengage a core readily at the mobilization of compression. The resulting near-zero compression force in a steel core in CFBs benefits majorly in very minimal requirement in steel core restraint, unlike the BRB system that depends upon a weighty casing (steel tube filled with mortar) to maintain a steel core’s compressive force. As a result of an extermination of restraining casing in CFBs, the light weight CFB system promotes ease of installation and replacement of a plastically-deformed steel core after the earthquake. Furthermore, retrofit and strengthening for earthquake of existing buildings is much easier than the counterpart system. In this research, the pseudo-static experiments were performed in steel frame sub-assemblage, equipped with CFD, under different level of story drifts. We obtained stable and predictable hysteretic loops which appear only in tension force side from a number of tests under different loading protocols. In the experiments, steel core replacements were carried out conveniently.

000018681 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018681 653__ $$abrace; seismic damper; energy dissipative device; earthquake; compression-free mechanism

000018681 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018681 720__ $$aThammarak, Punchet
000018681 8560_ $$ffischerc@itam.cas.cz
000018681 8564_ $$s962363$$uhttps://invenio.itam.cas.cz/record/18681/files/1985.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1985.
000018681 962__ $$r16048
000018681 980__ $$aPAPER