Non-slip-type restoring force characteristics of an exposed-type column base

Takamatsu, Takao; Tamai, Hiroshi

doi:10.1016/j.jcsr.2005.01.003

Cited by 27 publications

(17 citation statements)

References 3 publications

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“…The proposed model is validated with six available physical tests on XCBs with cantilever columns exhibiting various hysteretic behavior characteristics. In particular, the tests conducted by: (a) Takamatsu and Tamai (2005) 45 (noted as specimens Fix‐Ab‐N = 0C and Fix‐Ab‐N = 0.1C); (b) Trautner et al (2016) 27 (specimen S1S2); (c) Yamanishi et al (2009) 24 (specimen S‐Var); and (d) Gomez et al (2010) 25 (specimens #2 and #5). Each simulation is performed using a dynamic algorithm (ie, quasi‐static simulation) in order to stabilize the simulation with damping forces, since the simulation can be unstable especially when stiffness changes abruptly.…”

Section: Proposed Xcb Modelmentioning

confidence: 99%

“…Referring to Figure 4B, the proposed model depicts the increase in the expected flexural strength of the XCB due to the presence of the compressive axial load. Slight differences in the flexural stiffness during the initial loading/unloading may be attributed to the flexibility of the steel beam foundation 45 …”

Section: Proposed Xcb Modelmentioning

confidence: 99%

“…Tornado plot for sensitivity factor ξ. A, Specimen Fix‐Ab‐N = 0.1C (data from 45 ). B, Specimen 5 (data from 25 )…”

Section: Proposed Xcb Modelmentioning

confidence: 99%

“…Takamatsu and Tamai (2005) [45] (noted as specimens Fix-Ab-N=0C and Fix-Ab-N=0.1C); (2) Trautner et al (2016) [27] (specimen S1S2); (3) Yamanishi et al (2009) [24] (specimen S-Var); and (4) Gomez at al. (2010) [25] (specimens #2 and #5)…”

mentioning

confidence: 99%

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Anchor‐yield exposed column bases for minimizing residual deformations in seismic‐resistant steel moment frames

Inamasu

Sousa

Güell

et al. 2020

Earthq Engng Struct Dyn

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This paper explores the concept of dissipative exposed column base connections by means of anchor rod yielding. This concept aims at enhancing the seismic performance of low-rise steel moment-resisting frames (MRFs). A mechanics-based model is proposed that explicitly simulates a broad range of damage mechanisms observed in exposed column bases. The model is implemented in a frame finite element analysis program and its hysteretic performance is validated with experimental data available in literature. Incorporating this modeling feature in standard nonlinear response history analyses offers new insights in steel MRF responses. It is shown that when low-rise steel MRFs adopt a dissipative anchor-yield column base concept, they are less likely to experience residual story drift ratios during low-probability of occurrence seismic events. It is also found that low-rise steel MRFs designed with non-dissipative exposed column base connections are more prone to demolition than dissipative ones, due to their higher column residual axial shortening, particularly when ground motion duration is an important feature of the seismic hazard. Limitations of the present work are also discussed.

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Section: Proposed Xcb Modelmentioning

confidence: 99%

Section: Proposed Xcb Modelmentioning

confidence: 99%

“…Tornado plot for sensitivity factor ξ. A, Specimen Fix‐Ab‐N = 0.1C (data from 45 ). B, Specimen 5 (data from 25 )…”

Section: Proposed Xcb Modelmentioning

confidence: 99%

mentioning

confidence: 99%

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Anchor‐yield exposed column bases for minimizing residual deformations in seismic‐resistant steel moment frames

Inamasu

Sousa

Güell

et al. 2020

Earthq Engng Struct Dyn

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“…Some of these research works (e.g., Ikenaga et al 2006;Mackinven et al 2007;Chou and Chen 2011;Chi and Liu 2012;Yamanishi et al 2012;Takamatsu and Tamai 2005), have focused on the use of rocking column bases where post-tensioned (PT) bars, or yielding bolts, were used to control rocking behavior and to provide self-centering capability, while dedicated devices were used to dissipate seismic energy. Several different configurations were investigated considering different column sections, different lengths and different positions of the PT bars.…”

mentioning

confidence: 99%

Experimental Evaluation of a Rocking Damage-Free Steel Column Base with Friction Devices

2020

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The paper presents the experimental evaluation of an earthquake-resilient rocking damage-free steel column base, previously proposed and numerically investigated by the authors. The column base uses post-tensioned high-strength steel bars to control its rocking behavior and friction devices to dissipate seismic energy. It is equipped with a circular steel plate with rounded edges, which is used as a rocking base. The rounded edges prevent stress concentration and damage of the contact surfaces, while the circular shape allows rocking towards all plan directions. Contrary to conventional steel column bases, the proposed column base exhibits monotonic and cyclic moment-rotation behaviors that are easily described by analytical equations. The latter allow the definition of a step-by-step design procedure, which ensures damage-free behavior, selfcentering capability and energy dissipation capacity for a target design base rotation. The experimental tests are conducted under monotonic and cyclic loads demonstrating the damage-free behavior even under large rotations. Then, the experimental results are used to validate the design procedure and to calibrate refined 3D nonlinear finite element models in ABAQUS that will allow further investigations.

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Investigation of low‐disturbance seismic retrofit method for steel column bases using curved members

Lin,

Kurata,

Kawasaki

et al. 2024

Japan Architectural Review

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Seismic retrofit has always been a very important subject in recent years. However, typical retrofit techniques such as load‐resisting systems, damper devices, and seismic isolation systems will cause considerable disturbances to the structural system, such as increased force demand, and the building's occupants will need to be temporarily relocated during the construction. A design of the low‐disturbance retrofit method for steel column bases that uses the advantages of the curved member has been proposed in the study to improve seismic performance and reduce the mentioned demerits above. The basic mechanism of the curved member retrofit system was first analytically evaluated by preliminary modeling, followed by a parametric study to verify the effective shape. Four curved member specimens were tested with variations in fabrication processes and boundary conditions. Several aspects, including overall behavior, strength backbones, and deformation shapes of the specimens, were examined upon measured responses. The hysteretic performance of the curved member retrofit system is verified to achieve a stable cyclic behavior with limited strength degradation. A set of physical equations for estimating the lateral loads were established and verified by developing numerical models with a good agreement that enabled them to accurately represent the measured responses in the test.

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Non-slip-type restoring force characteristics of an exposed-type column base

Cited by 27 publications

References 3 publications

Anchor‐yield exposed column bases for minimizing residual deformations in seismic‐resistant steel moment frames

Anchor‐yield exposed column bases for minimizing residual deformations in seismic‐resistant steel moment frames

Experimental Evaluation of a Rocking Damage-Free Steel Column Base with Friction Devices

Investigation of low‐disturbance seismic retrofit method for steel column bases using curved members

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