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

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
C. Oktay Azeloglu ◽  
Ayse Edincliler ◽  
Ahmet Sagirli
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Seismic Behavior ◽  
Dynamic Behaviour ◽  
Earthquake Ground Motion ◽  
Shake Table ◽  
Engineering Structures ◽  
Shake Table Tests ◽  
Container Cranes ◽  
Container Crane

This paper is concerned with the verification of mathematical modeling of the container cranes under earthquake loadings with shake table test results. Comparison of the shake table tests with the theoretical studies has an important role in the estimation of the seismic behavior of the engineering structures. For this purpose, a new shake table and mathematical model were developed. Firstly, a new physical model is directly fixed on the shake table and the seismic response of the container crane model against the past earthquake ground motion was measured. Secondly, a four degrees-of-freedom mathematical model is developed to understand the dynamic behaviour of cranes under the seismic loadings. The results of the verification study indicate that the developed mathematical model reasonably represents the dynamic behaviour of the crane structure both in time and frequency domains. The mathematical model can be used in active-passive vibration control studies to decrease structural vibrations on container cranes.

Seismic Behavior of a Jumbo Container Crane Including Uplift

2011 ◽  
Vol 27 (3) ◽  
pp. 745-773 ◽  
Author(s):  
Laura D. Jacobs ◽  
Benjamin D. Kosbab ◽  
Roberto T. Leon ◽  
Reginald DesRoches
Keyword(s):  
Seismic Behavior ◽  
Time History ◽  
Nonlinear Finite Element ◽  
Analytical Models ◽  
Elastic Behavior ◽  
Model Structure ◽  
Shake Table Tests ◽  
Container Cranes ◽  
Container Crane ◽  
Type Response

Despite their importance to successful port operations, container cranes have received little attention in the context of seismic behavior. This paper presents the results of scale testing and analysis of a typical jumbo container crane subjected to earthquake loading. A series of 1:20 scale shake table tests of the model structure is performed under increasing levels of acceleration to assess and characterize the critical responses. Complimentary detailed nonlinear finite element time history analyses are also carried out. It is found that the portal frame response dominates elastic behavior and is closely coupled with an uplift and derailment rocking-type response at higher excitation levels. Proposed analytical models can capture this coupled response well, while a simple pseudostatic analysis can accurately estimate the onset of uplift and derailment.

Seismic Behavior of Brick Cave Dwellings: Shake Table Tests

2021 ◽  
pp. 102886
Author(s):  
Jianyang Xue ◽  
Pengchun Hu ◽  
Fengliang Zhang ◽  
Yan Zhuge
Keyword(s):  
Seismic Behavior ◽  
Shake Table ◽  
Shake Table Tests

Experimental Investigation on the Seismic Behavior of Palletized Merchandise in Steel Storage Racks

2010 ◽  
Vol 26 (1) ◽  
pp. 209-233 ◽  
Author(s):  
Petros Sideris ◽  
Andre Filiatrault ◽  
Martin Leclerc ◽  
Robert Tremblay
Keyword(s):  
Seismic Behavior ◽  
Frictional Coefficient ◽  
Western United States ◽  
Shake Table ◽  
Major Objective ◽  
Earthquake Excitation ◽  
Shake Table Tests ◽  
Frictional Behavior ◽  
Pull Tests ◽  
Storage Racks

The seismic hazard associated with failure of storage racks in retail facilities open to public depends on the behavior of the rack frames and the response of stored merchandise. In this study, the seismic behavior of palletized merchandise stored on shelves of pallet-type steel storage racks is investigated and the concept of incorporating slightly inclined shelving is proposed as a measure for mitigating merchandise shedding. Pull tests and shake table tests are conducted. The main objective of the pull tests is to investigate the frictional behavior at the interface between loaded pallets and rack shelves. The major objective of the shake table tests is to characterize the dynamic response of the palletized merchandise under earthquake excitation imposed at the base of rack structures, and determine experimentally the pallet shedding fragility under an ensemble of ground excitations representative of the seismicity of the Western United States. The combination of wooden pallets and shelves with wire decking of waterfall type, typical of many rack installations, is considered. The results of the pull tests indicate that the frictional coefficient at the pallet-to-shelf interface varies between 0.37 and 0.45 for a range of loads between 0.55 kN and 13.00 kN. From the results of the shake table tests, the concept of inclined shelving appears to be very effective. An inclination of only 3.5° reduced the observed seismic merchandise shedding fragility to zero for the ground excitations considered.

scholarly journals Seismic Performance Comparison of a High-Content SDA Frame and Standard RC Frame

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
John W. van de Lindt ◽  
R. Karthik Rechan
Keyword(s):  
Seismic Behavior ◽  
Cement Content ◽  
Performance Comparison ◽  
Shake Table ◽  
Spray Dryer ◽  
Structural Members ◽  
Shake Table Tests ◽  
Concrete Frame ◽  
Concrete Mix ◽  
Portal Frame

This study presents the method and results of an experiment to study the seismic behavior of a concrete portal frame with fifty percent of its cement content replaced with a spray dryer ash (SDA). Based on multiple-shake-table tests, the high content SDA frame was found to perform as well as the standard concrete frame for two earthquakes exceeding design-level intensity earthquakes. Hence, from a purely seismic/structural standpoint, it may be possible to replace approximately fifty percent of cement in a concrete mix with SDA for the construction of structural members in high seismic zones. This would help significantly redirect spray dryer ash away from landfills, thus, providing a sustainable greener alternative to concrete that uses only Portland cement, or only a small percentage of SDA or fly ash.

Seismic Behavior of Flexible Conductors Connecting Substation Equipment—Part II: Shake Table Tests

2004 ◽  
Vol 19 (4) ◽  
pp. 1680-1687 ◽  
Author(s):  
H. Ghalibafian ◽  
G.S. Bhuyan ◽  
C. Ventura ◽  
J.H. Rainer ◽  
D. Borthwick ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Shake Table ◽  
Shake Table Tests ◽  
Equipment Part ◽  
Substation Equipment

Seismic Responses and Collapse of a RC Pedestrian Cable-Stayed Bridge: Shake Table Tests

2019 ◽  
Vol 19 (07) ◽  
pp. 1950067 ◽  
Author(s):  
Yue Zheng ◽  
You-Lin Xu ◽  
Sheng Zhan
Keyword(s):  
Ground Motion ◽  
Seismic Behavior ◽  
Mode Shapes ◽  
Collapse Mechanism ◽  
Shake Table ◽  
Seismic Responses ◽  
Shake Table Tests ◽  
Cable Stayed Bridge ◽  
Seismic Collapse ◽  
Cable Stayed Bridges

There have been numerous experimental studies on the seismic collapse of reinforced concrete (RC) buildings and RC girder bridges, but not on the seismic collapse of RC pedestrian cable-stayed bridges. Postearthquake field investigations revealed that if RC pedestrian cable-stayed bridges in seismic regions were not appropriately designed, they are likely to encounter severe damage or collapse. This paper thus presents an experimental investigation on a 1:12 scaled RC pedestrian cable-stayed bridge to explore the seismic behavior and collapse mechanism of the bridge under different levels of ground motion. The design, construction, and installation of the bridge, along with the shake table tests, were performed. The dynamic characteristic tests of the bridge were carried out, with the natural periods and mode shapes identified. The bridge was then tested by subjecting it to three levels of ground motion, i.e. small, moderate and large earthquakes. The seismic behavior and seismic-resistant capacity of the cable-stayed bridge were finally assessed at the component level and the failure mode of the bridge was identified based on the seismic responses recorded by the measurement system. The test results showed that the collapse of the RC pedestrian cable-stayed bridge was triggered from the flexure failure of its columns and ended with the flexure-shear failure of its tower.

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