Investigation of Seismic Behavior of Container Crane Structures by Shake Table Tests and Mathematical Modeling

Azeloglu, C. Oktay; Edinçliler, Ayşe; Sagirli, Ahmet

doi:10.1155/2014/682647

Cited by 18 publications

(16 citation statements)

References 14 publications

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“…Kohama [13] and Miyata [14] et al analyzed the dynamic response characteristics of a crane structure under the action of a rare earthquake by performing model experiments and numerical simulation. Azeloglu et al [15] verified the mathematical modeling of container cranes under earthquake loadings with shake table test results; the developed mathematical model reasonably represented the dynamic behavior of the crane structure both in time and frequency domains. Inadomi et al [16] carried out a series of the vibration tests of a prototype wharf and calculation simulation of the wharf and the crane to study the vibration characteristics of the structures; they observed that the crane exerted an insignificant effect on the vibration of the wharf when the acceleration was small (not exceeding 20 gal).…”

Section: Literature Reviewmentioning

confidence: 85%

Dynamic Interaction Behavior between Jumbo Container Crane and Pile - Supported Wharf underNear - Field and Far - Field Ground Motions

Li¹,

Song²,

Cui³

2016

JESTR

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Playing an important role in local and national seaport activities, container wharves are susceptible to structural failure and damage during earthquake events. Therefore, factors that affect the seismic response of crane-wharf structures under different types of earthquake ground motions should be elucidated. In this paper, 3D finite element models were established to investigate the differences of natural vibration characteristics between the wharf and crane-wharf structures. The dynamic response of a typical pile-supported wharf structure and the interaction behavior of a crane and wharf structural system under seismic actions of near-field and far-field ground motions were studied by performing numerical simulation and time-history response analysis. Axial force-moment relation curves were adopted to analyze the elastic-plastic limit state of the wharf structure under different ground motions. Results showed that the consideration of the container crane increased the natural vibration period of the pile-supported wharf structure and affected the dynamic characteristics of the structure. Compared with the far-field earthquake ground motion, the nearfield earthquake exerted a more significant impact on the structural dynamic response that controlled the elastic-plastic limit state. With the presence of a crane, the moment and shear force of the pile-top decreased and the location of the extreme value moved down obviously. The findings demonstrated that considering the crane changed the failure mechanism of the wharf structure, and the eccentric effect of the crane may amplify the dynamic response as the peak ground acceleration increases. The results provide reference for the seismic design and the evaluation of the seismic response of container wharves.

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Section: Literature Reviewmentioning

confidence: 85%

Dynamic Interaction Behavior between Jumbo Container Crane and Pile - Supported Wharf underNear - Field and Far - Field Ground Motions

Li¹,

Song²,

Cui³

2016

JESTR

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“…e main response form of QCC is the bending vibration of the leg around z-axis under seismic condition; thus, the content of Section 2.2 can be referred to design the cross section size of the leg. e sectional dimensions of landside leg 2 and the z-axis moment of inertia are 186.7 mm 2 and 3.42e5 mm 4 , respectively. However, it should be noted that the size of the similarity leg is difficult to achieve in practice.…”

Section: Eory Of Dynamicmentioning

confidence: 99%

“…However, it is very difficult to manufacture a complete dynamic similar model of QCC in the above-scale ratio range as the geometric size of each component in QCC cannot be magnified or reduced in equal proportions. Although the method of adding mass [2,3], amplifying input acceleration peak [4] and adjusting the section moment of inertia [5,6], was used to satisfy the similarity design, these methods have their limitations; for example, the method of adding mass has a negative influence on the QCC stability of overall structure.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Verification of a 1/20 Scale Model of Quayside Container Crane Using Distortion Theory

2019

Shock and Vibration

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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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“…The authors showed that the simulated model is sufficient to perform dynamic time history analysis for evaluating the overall behavior, including uplift and derailment phenomena. Azeloglu et al [3] investigated the seismic behavior of the container crane by shake table test (using a 1:20 scaled container crane) and a mathematical model, and also concluded that the dynamic behavior, including in the time and frequency domains, of the crane structure could be represented by the mathematical model. Kanayama et al [4] carried out studies on the dynamic response of cranes by a series of shaking table tests (using 1/25 and 1/8 scaled crane models).…”

Section: Introductionmentioning

confidence: 99%

Effects of Boundary Condition Models on the Seismic Responses of a Container Crane

et al. 2019

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In recent years, several large earthquakes have caused the collapse of container cranes, which have resulted in halting of freighting, and significantly affected the economy. Some reports are concerned the uplift and derailment events of crane legs, and the collapse of the crane itself. In this study, the effects of different boundary conditions used in the numerical method are investigated for a container crane under seismic excitation. Three different boundary conditions are considered in terms of the connection of the crane’s legs (wheels) and the ground (rails), namely pin support (PIN), gap element (GAP), and Friction contact (FC) elements, by using the SAP2000 program for a typical container crane. Then, time history dynamic analyses are conducted using nine recorded ground motions. Dynamic behaviors of the container crane are studied in terms of the total base shear, portal drift, and relative displacement of legs, by investigating the three types of base boundary conditions. The results of the study show that when the intensity of earthquakes is large enough to create uplift and derailment events, the selection of the boundary condition model considerably affects the dynamic responses of the container crane. In addition, when uplift and derailment of the crane occur, the FC support condition is the most compatible with the real behavior of the crane. On the other hand, under low seismic excitation, there is no significant difference of the crane behavior according to the choice of boundary condition model.

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Investigation of Seismic Behavior of Container Crane Structures by Shake Table Tests and Mathematical Modeling

Cited by 18 publications

References 14 publications

Dynamic Interaction Behavior between Jumbo Container Crane and Pile - Supported Wharf underNear - Field and Far - Field Ground Motions

Dynamic Interaction Behavior between Jumbo Container Crane and Pile - Supported Wharf underNear - Field and Far - Field Ground Motions

Design and Experimental Verification of a 1/20 Scale Model of Quayside Container Crane Using Distortion Theory

Effects of Boundary Condition Models on the Seismic Responses of a Container Crane

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