000019662 001__ 19662
000019662 005__ 20170118182330.0
000019662 04107 $$aeng
000019662 046__ $$k2017-01-09
000019662 100__ $$aInoue, Norio
000019662 24500 $$aDisplacement Control Design Concept for Long-Period Structures: Design Strategies for High-Rise and Seismic Isolated Buildings Subjected To Strong Ground Motions

000019662 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019662 260__ $$b
000019662 506__ $$arestricted
000019662 520__ $$2eng$$aThe earthquake-resistant design code provision at the beginning in Japan required that structures resist seismic force produced by response acceleration. The design concept subsequently, in accordance with the increase of heights of structures to be constructed, evolved to take response displacement as well as response acceleration into account to utilize ductility of structures in reduction of required strength on the basis of energy balance concept. It is attracting much attention that excessive displacements in long-period structures such as high-rise or seismic isolated buildings, the number of which are designed and constructed is increasing nowadays, might occur due to long-period components of extreme ground motions. The excessive displacement may not necessarily cause structural damage, whereas the excessive displacement itself is harmful. It is considered to be effective to incorporate some damping devices that control vibrations in direct response to the response displacement. The authors define this concept as “displacement control design” and have developed some control strategies and devices to realize it. This paper outlines the basic concept of displacement control design and the mechanisms and application of the newly developed dampers. The basic concept is utilizing a damper that generates resistant force in response to displacement without velocity dependency. Theoretical representation of such damping element is complex stiffness. Although the present damping element can be realized by using magneto-rheological (MR) fluid damper, the damper is unreliable in seismic events because of power source failure. The problem of non-causality of complex stiffness makes realization of such damping device more difficult. To solve these problems, we developed tuned viscous mass dampers for seismic control, rotational viscous mass dampers, performance variable oil dampers, and friction dampers with coupling mechanism for seismic isolation. By using these devices, we can build systems that can reduce response displacements without deterioration of floor response accelerations in response to each criterion for the corresponding earthquake input level. These devices can be, so to speak, categorized as smart passive damper and are effective in response control of structures against expected extreme seismic events.

000019662 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019662 653__ $$adisplacement control; long-period structure; high-rise building; seismic isolation; smart passive damper

000019662 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019662 720__ $$aInoue, Norio$$iIkago, Kohju
000019662 8560_ $$ffischerc@itam.cas.cz
000019662 8564_ $$s568281$$uhttps://invenio.itam.cas.cz/record/19662/files/4123.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4123.
000019662 962__ $$r16048
000019662 980__ $$aPAPER