&lt;title&gt;Earthquake response reduction of buildings by rocking structural systems&lt;/title&gt;

Midorikawa, Mitsumasa; Azuhata, Tatsuya; Ishihara, Tadashi; Matsuba, Yutaka; Matsushima, Y.; Wada, Akira

doi:10.1117/12.472562

Cited by 21 publications

(18 citation statements)

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“…Steel butterflyshaped fuses and BRBs were employed as replaceable energydissipation members. Midorikawa et al [5,19] conducted shakingtable tests of a half-scale three-story rocking frame after installing yielding plates at the bases of columns to dissipate energy. Wada et al [7] used a similar concept at the connections of columns in the middle story of a slender, tall frame.…”

Section: Introductionmentioning

confidence: 99%

“…There are roughly three types of self-centering systems: (1) moment-resisting frames with post-tensioned (PT) beam-tocolumn connections and flexible floor systems that allow gaps to open between the beam-to-column connections [2]; (2) braced frames with self-centering braces or buckling-restrained braces (BRBs) that can return after loading to their initial length because of super-elastic pretensioned elements [3,4]; and (3) rocking systems that can selfcenter, relying on the restoring force of gravity, and PT elements [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Seismic performance of controlled spine frames with energy-dissipating members

Takeuchi

Chen

Matsui

2015

Journal of Constructional Steel Research

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Recently, various controlled rocking systems have been proposed in seismic design to prevent damage concentration and to achieve self-centering against a wide range of input ground motion intensities. However, several obstacles must be overcome before these systems can be applied to actual buildings; for example, the requirement for large, self-centering post-tensioned strands and special treatment at uplift column bases must be addressed. This paper proposes a non-uplifting spine frame system with energy-dissipating members without post-tensioned strands, its self-centering function is achieved by envelope elastic-moment frames. The system is applied to an actual building constructed in Japan. Conventional shear damper and uplifting rocking systems with post-tensioned strands developed in prior studies are also applied to the same building structures, and the performances of the three systems, including damage distribution, energy dissipation, self-centering, robustness against severe earthquakes, and irregular stiffness, are compared and discussed through numerical simulations based on practical design criteria.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic performance of controlled spine frames with energy-dissipating members

Takeuchi

Chen

Matsui

2015

Journal of Constructional Steel Research

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“…Supports with a shallow Vshaped channel are attached on the footing beam as in the preceding test [9]. The specimen is just put on the supports, so the specimen is allowed to uplift without slippage between the specimen and the footing beam under earthquake excitation.…”

Section: Specimenmentioning

confidence: 99%

“…The authors also studied experimentally and analytically from the point of view of utilizing transient uplift motion for reduction of seismic response (e.g. [9][10][11]). In the experiment, 5 story and 3 story reduced scale steel frame were used as specimen.…”

Section: Introductionmentioning

confidence: 99%

Shaking table test on seismic response of reduced-scale models of multi-story buildings allowed to uplift

Ishihara¹,

Azuhata²,

Noguchi³

et al. 2007

WIT Transactions on the Built Environment, Vol 93

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The effects of rocking vibration accompanied by uplift motion may reduce seismic damage to buildings. Structural systems that are allowed to uplift can be recognized as one of the simplest "self-centring" systems utilizing potential energy of self-weight. To investigate the effect of uplift motion on seismic responses of buildings experimentally, we conducted parametric shaking table tests using reduced-scale specimens with multi-stories. In this paper, the results of the tests are reported and discussed.

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“…Based on these studies, structural systems have been developed that permit rocking vibration and uplift motions under appropriate control during strong earthquake ground motions [4][5][6][7][8][9][10]. The past shaking table tests by the authors on a three story half scale braced frame verified that the rocking structural system, which employs the yielding mechanism of the base plates, can reduce earthquake responses of the frame [7][8][9][10]. However, these tests also showed that the considerable vertical impulsive force occurs at the column bases by the impact effect when the uplifting columns touch down to their original position.…”

Section: Introductionmentioning

confidence: 99%

Effect of impulsive force on earthquake response of rocking structural systems

Azuhata¹,

Ishihara²,

Midorikawa³

2007

WIT Transactions on the Built Environment, Vol 93

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To reduce seismic damage of steel building structures, a rocking structural system which employs the yielding mechanism of base plates has been suggested by the authors. When weak base plates yield due to column tension during a strong earthquake ground motion, the columns uplift and enable the building structure to rock. The performance of the suggested system for earthquake response reduction has previously been successfully demonstrated by the use of shaking table tests on a three story half scale braced frame. However, these tests also established that considerable vertical impulsive force occurs at the column bases when the uplifting columns touch down to their original position. The objective of this study is to investigate the influence of this impulsive force on earthquake response of real scale rocking structures. Earthquake response analyses are carried out on a steel model frame with yielding base plates. The frame has ten stories and one bay. The height and the width are 37.8 m and 7.5 m, respectively. The viscous damping is assumed to be proportional to the initial stiffness. The critical damping ratio of 2.0% is introduced to the first mode. The analysis results showed that vertical response acceleration on the frame is largely and instantly amplified by the impact effect when the uplifting column touches down. However, the impulsive vertical force does not damage the column, because it damps very quickly under the assumption of stiffness-proportional viscous damping.

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<title>Earthquake response reduction of buildings by rocking structural systems</title>

Cited by 21 publications

References 0 publications

Seismic performance of controlled spine frames with energy-dissipating members

Seismic performance of controlled spine frames with energy-dissipating members

Shaking table test on seismic response of reduced-scale models of multi-story buildings allowed to uplift

Effect of impulsive force on earthquake response of rocking structural systems

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