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 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

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.

Shake-table tests on frame built in crumb rubber concrete

2020 ◽  
Vol 23 (10) ◽  
pp. 2003-2017
Author(s):  
Hanif Ullah ◽  
Naveed Ahmad ◽  
Muhammad Rizwan
Keyword(s):  
Experimental Study ◽  
Seismic Response ◽  
Crumb Rubber ◽  
Shake Table ◽  
Reinforced Concrete Frame ◽  
Shake Table Tests ◽  
Concrete Frame ◽  
Time Period ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

This article presents experimental study performed on a first-of-its-kind frame fabricated using crumb rubber concrete, that is, concrete with waste rubbers (crumb) as a partial replacement of fine aggregate (sand). A 20% volume of sand was replaced by rubber crumb. Free vibration and shake-table tests were performed on 1:3 reduced scale frame models, both conventional reinforced concrete frame and crumb rubber concrete frame. The dynamic properties (i.e. frequency/time period, elastic viscous damping, and floor acceleration amplification) and seismic response parameters (i.e. ductility and response modification factors) were obtained. In addition, lateral displacement demand was correlated with peak base acceleration to derive seismic response curves. The seismic performance of crumb rubber concrete frame was compared with the conventional reinforced concrete frame in order to assess the feasibility of rubberized concrete for building constructions in areas of active seismicity. The following were concluded on the basis of experimental study: the elastic damping reduced by 12%, the initial time period increased by 6%, specific weight of concrete reduced by 6%, maximum lateral load reduced by 20%, lateral maximum story drift capacity increased by 30%, displacement ductility ratio increased by 2%, response modification factor reduced by 24%, maximum peak base acceleration resistance corresponding the incipient collapse state increased by 40%.

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.

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
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