Shaking table tests of bridge model with friction sliding bearings under bi-directional earthquake excitations

In the first part of this study, theoretical and numerical evaluation of negative stiffness appearing in the skyhook control is conducted. The skyhook control is widely known for the vibration control method in the mechanical engineering field. The skyhook control can also achieve absolute response reduction. In order to realize a negative stiffness, however, the control force that accelerates the deformation should be generated. At present, such a performance is achieved only by using loading actuators or semi-active devices with sophisticated controllers and sensors. In the second part of this research, a new damper realizing a negative stiffness and stable energy dissipation in a passive manner is proposed, and its dynamic performance is investigated through large-scale shaking table tests. It is confirmed that the innovative negative stiffness passive damper reduces both the absolute acceleration and the relative displacement of a bridge model.

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Shaking table tests on spherical sliding bearings taking eccentricity and uplift into account

Japan Architectural Review ◽

10.1002/2475-8876.12080 ◽

2019 ◽

Vol 2 (2) ◽

pp. 172-184

Author(s):

Toru Takeuchi ◽

Hideji Nakamura ◽

Masakaze Uchida ◽

Michiyasu Yoshida ◽

Ryota Matsui

Keyword(s):

Shaking Table ◽

Shaking Table Tests ◽

Sliding Bearings

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SHAKING TABLE TESTS ON SPHERICAL SLIDING BEARINGS TAKING ECCENTRICITY AND UPLIFT INTO ACCOUNT

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.80.1385 ◽

2015 ◽

Vol 80 (715) ◽

pp. 1385-1392

Author(s):

Toru TAKEUCHI ◽

Hideji NAKAMURA ◽

Masakaze UCHIDA ◽

Michiyasu YOSHIDA ◽

Ryota MATSUI

Keyword(s):

Shaking Table ◽

Shaking Table Tests ◽

Sliding Bearings

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Shaking table tests of a scaled bridge model with rolling-type seismic isolation bearings

Engineering Structures ◽

10.1016/j.engstruct.2006.05.025 ◽

2007 ◽

Vol 29 (5) ◽

pp. 694-702 ◽

Cited By ~ 37

Author(s):

Meng-Hao Tsai ◽

Si-Yi Wu ◽

Kuo-Chun Chang ◽

George C. Lee

Keyword(s):

Seismic Isolation ◽

Shaking Table ◽

Shaking Table Tests ◽

Bridge Model

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Shaking table tests of a single-span freestanding rocking bridge for seismic resilience and isolation

Advances in Structural Engineering ◽

10.1177/1369433219859410 ◽

2019 ◽

Vol 22 (15) ◽

pp. 3222-3233

Author(s):

Xiu-Li Du ◽

Yu-Long Zhou ◽

Qiang Han ◽

Zhen-Lei Jia

Keyword(s):

Experimental Study ◽

Analytical Model ◽

Seismic Behavior ◽

Experimental Results ◽

Shaking Table ◽

Shaking Table Tests ◽

Peak Displacement ◽

Bridge Model ◽

Earthquake Resilience ◽

Seismic Resilience

Rocking philosophy has advantages to maintain a preferable post-earthquake serviceability as an alternative of seismic resistant systems. This article presents an experimental study on the seismic behavior of a rocking bridge with freestanding columns capped with a freely supported deck. A 1/10 scaled, single-span double-column freestanding bridge was constructed and tested on a shaking table. The experimental results showed that the bridge model could undergo large rocking with enough stability under earthquakes and presented excellent post-earthquake resilience after earthquakes with limited damage and negligible residual displacement. The rocking bridge model also exhibited expected isolation efficiency, which increases as the level of excitations becomes more severe. In addition, an analytical model based on multi-block rocking mechanisms was used to calculate the displacement response. Compared with the experimental results, this analytical model well predicts the peak displacement of the rocking bridge model.

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