Seismic Performance of Raised Floor System by Shake Table Excitations

2008 ◽  
Author(s):  
Wen-I Liao ◽  
Juin-Fu Chai
Keyword(s):  
Seismic Performance ◽  
Dynamic Characteristics ◽  
Ground Motions ◽  
Frame Structure ◽  
High Tech ◽  
Shake Table ◽  
Shake Table Tests ◽  
Floor Systems ◽  
Simulated Ground Motions ◽  
Floor System

Seismic performance of nonstructural elements such as the raised floor system has not attracted much attention. However, damage of expensive equipments that stand in the raised floor system of high-tech FAB was often observed during past earthquake in Taiwan area. This will result in huge loss of manufacturing functions and properties for the high-tech industry. There is a need to understand the dynamic characteristics of the raised floor system for future seismic protection. This paper presents the seismic performance of raised floor system by shake table excitations. The tested raised floor system was a pedestal-stringer frame structure, and supporting a simulated equipment. This raised floor system was the typical system that frequently used in Taiwan semi-conductor FAB. The input motions for the shake table tests were the waffle-slab floor acceleration responses of a typical semi-conductor FAB by input simulated ground motions. The simulated ground motions are base on the phase spectrum and the maximum potential earthquake of site located at Taiwan Hsin-Chu Science Park. The dynamic characteristics include the acceleration amplification and dependence of input motions by raised floor system was studied and discussed. This study also employee the finite element package to carry out numerical simulation on seismic responses of raised floor systems and compared with the experimental data, and show that the proposed simulation model was very excellent.

Seismic performance of pile group-structure system in liquefiable and non-liquefiable soil from large-scale shake table tests

2020 ◽  
Vol 138 ◽  
pp. 106299 ◽  
Author(s):  
Chengshun Xu ◽  
Pengfei Dou ◽  
Xiuli Du ◽  
M. Hesham El Naggar ◽  
Masakatsu Miyajima ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Large Scale ◽  
Group Structure ◽  
Pile Group ◽  
Shake Table ◽  
Shake Table Tests ◽  
Structure System ◽  
Liquefiable Soil

SEISMIC PERFORMANCE OF MASONRY-INFILLED RC FRAMES WITH AND WITHOUT RETROFIT

2013 ◽  
Vol 07 (03) ◽  
pp. 1350023 ◽  
Author(s):  
P. BENSON SHING ◽  
IOANNIS KOUTROMANOS ◽  
ANDREAS STAVRIDIS
Keyword(s):  
Finite Element ◽  
Seismic Performance ◽  
Numerical Study ◽  
Critical Role ◽  
Finite Element Models ◽  
Shake Table ◽  
Shake Table Tests ◽  
Rc Frames ◽  
Infilled Rc Frames ◽  
Masonry Infilled Rc Frames

This paper presents the findings of a research that focused on the seismic performance of masonry-infilled, nonductile, RC frames. This research has resulted in improved analytical methods and effective retrofit techniques to assess and enhance the performance of these structures. The methods were validated by a series of quasi-static tests conducted on one-story frame specimens as well as shake-table tests conducted on two 2/3-scale, three-story, two-bay, masonry-infilled, RC frames. This paper focuses on the observations from the shake-table tests and the further insight gained from a numerical study conducted with finite element models. The first shake-table test specimen had no retrofit measures, and the second had infill walls in the first and second stories strengthened with Engineered Cementitious Composite (ECC) and Fiber Reinforced Polymeric (FRP) overlays, respectively. The tests demonstrated the effectiveness of the retrofit measures. Finite element models that combine smeared and discrete cracks have been used in a numerical study to examine the benefits of the ECC retrofit and the influence of the capacity of the shear dowels that connect an ECC overlay to the RC beams on structural performance. It has been shown that these shear dowels play a critical role in enhancing both the strength and ductility of a retrofitted structure.

Research on Seismic Strengthening with the Performance of the Dynamic Measurement Method

2014 ◽  
Vol 1021 ◽  
pp. 152-155 ◽  
Author(s):  
Jian Jian Zhang ◽  
Yong Sheng Zhang
Keyword(s):  
Seismic Performance ◽  
Dynamic Characteristics ◽  
Residential Building ◽  
High Sensitivity ◽  
Modal Identification ◽  
Frame Structure ◽  
Test Results ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
High Rise

The structure of the dynamic characteristics can comprehensively reflect the seismic performance of the structure. By high sensitivity under external excitation vibration pickup pick structure dynamic response to obtain the dynamic characteristics of buildings, this paper introduces the principle of vibration test and modal identification method of information. To high-rise shear wall of reinforced concrete frame structure of a residential building as an example, has carried on the test, through the test results of the seismic performance of this structure after reinforcement.

Shake table tests on the out-of-plane response of unreinforced masonry wallsThis article is one of a selection of papers published in this Special Issue on Masonry.

2007 ◽  
Vol 34 (11) ◽  
pp. 1381-1392 ◽  
Author(s):  
C. S. Meisl ◽  
K. J. Elwood ◽  
C. E. Ventura
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Unreinforced Masonry ◽  
Rigid Bodies ◽  
Shake Table ◽  
Shake Table Tests ◽  
Out Of Plane ◽  
Wall Construction ◽  
Selection Of

Given sufficient anchorage to the diaphragms, out-of-plane walls in unreinforced masonry (URM) buildings have been shown to crack above midheight and then rock as two rigid bodies. This study investigates the sensitivity of the rocking response to the type of ground motion and the quality of the wall construction. Shake table tests were conducted on four full-scale multi-wythe walls, all with a height to thickness (h/t) ratio of 12 but of varying construction quality and subjected to three different ground motions. All walls experienced cracking at less than one half of the 2005 National Building Code of Canada (NBCC) level for Vancouver, but exhibited a stable rocking behaviour without collapse beyond a ground motion 1.5 times the 2005 NBCC level.

Seismic Performance of a Base Isolated Structure by Shake Table Tests

2008 ◽  
Author(s):  
Cem Yenidoǧan ◽  
Eren Uçkan ◽  
Adolfo Santini ◽  
Nicola Moraci
Keyword(s):  
Seismic Performance ◽  
Shake Table ◽  
Shake Table Tests

Physical Model Study of the Seismic Performance of Highway Embankments with and without Geotextile

2017 ◽  
Vol 11 (02) ◽  
pp. 1750003 ◽  
Author(s):  
Ayşe Edinçliler ◽  
Yasin Sait Toksoy
Keyword(s):  
Seismic Performance ◽  
Structural Safety ◽  
Shake Table ◽  
Geosynthetic Reinforcement ◽  
Shake Table Tests ◽  
Seismic Safety ◽  
Dynamic Motion ◽  
Slope Inclination ◽  
Highway Embankments ◽  
Motion Characteristics

In order to ensure structural safety and integrity in earthquake conditions, it may be useful or even necessary to increase the seismic safety of the highway embankments with reinforcement inclusions. The inclusion of geosynthetics in highway embankments may provide an additional tensile strength and durability to construct more stable and earthquake resistant embankments. In this study, the contributions of the primary factors as inclusion of the geotextile reinforcement, slope inclination and dynamic motion characteristics affecting the seismic performance of the highway embankments are evaluated. Shake table models of the unreinforced and geosynthetic reinforced highway embankments with different slope inclinations are designed. An extensive series of shake table tests were performed under dynamic motions with different predominant frequencies. Test results revealed that inclusion of geotextiles in the embankment model causes deamplification of the transmitted accelerations traveling through the reinforced embankment models. Thus, the geosynthetic reinforcement successfully enhances the seismic performance and mitigates earthquake-related hazards. Contribution of this study to the literature is that the efficiency of the geosynthetic reinforcement by means of energy absorption properties is highly dependent on the dynamic motion characteristics but less dependent to the degree of slope inclination.

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