A method to solve discrepancies of scale model in seismic shake table test of quayside container crane

The scale model is an effective method to research the performance of quayside container crane (QCC) under the seismic condition, but the model distortion usually exists in the similar design process which leads to the incomplete similarity between the scale model and prototype. In this investigation, the distortion theory and the prediction coefficient correction method are used to upgrade the quality of 1/20 QCC scale model and, then, the seismic response of the QCC prototype is obtained from the shake table scale model test. In the first step, the similarity ratio of the 1/20 QCC scale model is calculated by the similitude law and the size of scale model is obtained from the similarity constants. In the second step, the bending stiffness is selected and determined as the distortion term and, then, the relationship between the distortion coefficient and the prediction coefficient is obtained by the finite element prediction coefficient method. Furthermore, the three different scale models are manufactured and tested in the shake table experiment under different seismic conditions. It is found that the experimental test results are consistent with the numerical simulation results of the QCC prototype. It can be concluded that the QCC scale model can be used to predict the performance of the prototype under the different seismic conditions after corrected by distortion theory, and the distortion theory is an effective method to solve the incomplete similarity between the scale model and prototype.

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Large Scale Shake Table Test of a Port Container Crane under Strong Motion Excitation

Structures Congress 2010 ◽

10.1061/41130(369)243 ◽

2010 ◽

Cited By ~ 1

Author(s):

Laura D. Jacobs ◽

Reginald DesRoches ◽

Roberto T. Leon

Keyword(s):

Large Scale ◽

Strong Motion ◽

Shake Table Test ◽

Shake Table ◽

Container Crane

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Shake Table Test of Complex High-Rise Building Equipped with Torsional Vibration Control Device

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.3889 ◽

2012 ◽

Vol 446-449 ◽

pp. 3889-3893

Author(s):

Bin Zhao ◽

Juan He ◽

Hui Gao ◽

Xu Gang Chen

Keyword(s):

Vibration Control ◽

Torsional Vibration ◽

Shake Table Test ◽

Scale Model ◽

Shake Table ◽

Test Results ◽

Torsional Mode ◽

High Rise ◽

High Rise Building ◽

Local Space

For many high-rising buildings, large local space is very useful for its special function needs, such as conference hall and hotel lobby. The shake table test results of a high-rising building with large local space show that the dynamic characteristics of such structure are complex and the torsional mode becomes the first mode, while the torsional responses under earthquake excitation, especially of the floor just above the large local space, are very remarkable. In this paper, the bidirectional Tuned Mass Damper (TMD) is employed for reducing the torsional vibration of such complex high-rise building structure. A reduced-scale model is design and constructed. A series of shake table tests are carried out and the test results indicate that the TMD system is very effective in torsional vibration control of structural system.

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Problems in Earthquake Resistance Evaluation of Gabion Retaining Wall Based on Shake Table Test with Full-Scale Model

Journal of Disaster Research ◽

10.20965/jdr.2019.p1154 ◽

2019 ◽

Vol 14 (9) ◽

pp. 1154-1169

Author(s):

Hiroshi Nakazawa ◽

Kazuya Usukura ◽

Tadashi Hara ◽

Daisuke Suetsugu ◽

Kentaro Kuribayashi ◽

...

Keyword(s):

Retaining Wall ◽

Retaining Walls ◽

Full Scale ◽

Shake Table Test ◽

Earthquake Resistance ◽

Seismic Stability ◽

Scale Model ◽

Shake Table ◽

Soil Pressure ◽

Mountainous Regions

The earthquake (Mw 7.3) that struck Nepal on April 25, 2015 caused damage to many civil engineering and architectural structures. While several road gabion retaining walls in mountainous regions incurred damage, there was very little information that could be used to draw up earthquake countermeasures in Nepal, because there have been few construction cases or case studies of gabion structures, nor have there been experimental or analytical studies on their earthquake resistance. Therefore, we conducted a shake table test using a full-scale gabion retaining wall to evaluate earthquake resistance. From the experiments, it was found that although gabion retaining walls display a flexible structure and deform easily due to the soil pressure of the backfill, they are resilient structures that tend to resist collapse. Yet, because retaining walls are assumed to be rigid bodies in the conventional stability computations used to design them, the characteristics of gabions as flexible structures are not taken advantage of. In this study, we propose an approach to designing gabion retaining walls by comparing the active collapse surface estimated by the trial wedge method, and the experiment results obtained from a full-scale model of a vertically-stacked wall, which is a structure employed in Nepal that is vulnerable to earthquake damage. When the base of the estimated slip line was raised for the trial wedge method, its height was found to be in rough agreement with the depth at which the gabion retaining wall deformed drastically in the experiment. Thus, we were able to demonstrate the development of a method for evaluating the seismic stability of gabion retaining walls that takes into consideration their flexibility by adjusting the base of the trial soil wedge.

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Seismic Behavior of Composite High-Rise Buildings with SRC Column, Steel Beam and RC Core Tube

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.2590 ◽

2012 ◽

Vol 204-208 ◽

pp. 2590-2594

Author(s):

Bin Zhao ◽

Juan He

Keyword(s):

Reinforced Concrete ◽

Seismic Behavior ◽

Shake Table Test ◽

Scale Model ◽

Steel Beam ◽

Shake Table ◽

Concrete Core ◽

Core Tube ◽

High Rise ◽

High Rise Building

In this research, a reduced scale model of the composite high-rise building with steel reinforced concrete column, steel beam and reinforced concrete core tube was designed and tested by using the shake table test technology. The acceleration and displacement of the model were measured during the tests. The cracking pattern and failure mechanism were illustrated. Above the shake table test, the finite element analysis of the test mode was carried out. The main effort of the numerical analysis was focused on the selection of the nonlinear models. Based on the experiment results and the strategy of considering nonlinear property of the beam-column joint and the short beam of the concrete core wall were proposed. It is proved that the proposed strategy is effective and economical for seismic behavior assessment of such composite high-rise building structure system.

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Theoretical design and experimental verification of a 1/50 scale model of a quayside container crane

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406211423603 ◽

2011 ◽

Vol 226 (6) ◽

pp. 1644-1662 ◽

Cited By ~ 4

Author(s):

Y L Jin ◽

Z G Li

Keyword(s):

Dynamic Characteristics ◽

Large Scale ◽

Shaking Table Test ◽

Shaking Table ◽

Scale Model ◽

Engineering Structures ◽

Scaled Model ◽

Container Crane ◽

Comparison Results ◽

Quayside Container Crane

An effective way to study the dynamic performances and seismic behaviours of large-scale engineering structures is using a scale model. This article aims to develop a geometric-scaled model of the 1/50 for a quayside container crane such that the dynamic characteristics of the prototype can be accurately predicted from the relevant features of this scale model. To this end, a detailed design process for the main components of a 1/50 scale model of the quayside container crane was first presented according to the similitude law. Then, a hammering modal test and the Ling dynamic system shaking table test were successively carried out to obtain the dynamic characteristics of this 1/50 scale model. Furthermore, the experimental results were compared with the computed results of the prototype obtained from numerical simulation and they showed a fairly good agreement. From the comparison results, it can be seen that the model design is instructive enough to provide some valuable information and practical use for professionals and researchers involved in the design of large-scale port facilities.

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Shake Table Test of a Bamboo Frame Structure

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.517.217 ◽

2012 ◽

Vol 517 ◽

pp. 217-221

Author(s):

Jin Zhu ◽

Qing Fang Lv

Keyword(s):

Green Building ◽

High Strength ◽

Pilot Project ◽

Shake Table Test ◽

Dynamic Responses ◽

Frame Structure ◽

Scale Model ◽

Shake Table ◽

Structural System ◽

Element Simulation

Modern bamboo engineering material is a new fast-renewable green building material with light weight and high strength. Bamboo structure made of this material is a new structural system in China so far. A shake table test on a 1/3 scale model of a two-storey bamboo-frame pilot project were conducted, in which its dynamic responses including acceleration and relative interstory drift were tested. Finite element simulation was applied into structural analysis as well. The results indicate that this structure has satisfactory aseismatic property. Based on the results, some suggestions are put forward on aseismatic design and construction measures of bamboo frame structure.

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