Shake-Table Tests and Numerical Analysis of Self-Centering Prestressed Concrete Frame

2019 ◽  
Vol 116 (3) ◽  
Author(s):  
Tong Guo ◽  
Yaowen Hao ◽  
Lianglong Song ◽  
Zhiliang Cao
Keyword(s):  
Numerical Analysis ◽  
Prestressed Concrete ◽  
Shake Table ◽  
Shake Table Tests ◽  
Concrete Frame

Shake table tests on prestressed concrete frames

1998 ◽  
Vol 31 (10) ◽  
pp. 676-682 ◽  
Author(s):  
Y. L. Mo ◽  
W. L. Hwang
Keyword(s):  
Prestressed Concrete ◽  
Shake Table ◽  
Concrete Frames ◽  
Shake Table Tests

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%.

scholarly journals Evaluation of Numerical Analysis for Earthquake Resistance of Retaining Wall Using Gabions

2019 ◽  
Vol 2 (2) ◽  
pp. 116-126
Author(s):  
Tsuyoshi Nishi ◽  
Tadashi Hara ◽  
Hiroshi Nakazawa ◽  
Daisuke Suetsugu
Keyword(s):  
Numerical Analysis ◽  
Slope Failure ◽  
Retaining Wall ◽  
Triaxial Compression ◽  
Retaining Walls ◽  
Full Scale ◽  
Earthquake Resistance ◽  
Shake Table ◽  
Compression Tests ◽  
Shake Table Tests

In developing countries, gabions are widely used in several construction works, like road, river, countermeasures against slope failure and so on, because of their easy operation and low cost. In 2015 Nepal Gorkha Earthquake, a lot of retaining walls using gabions were not damaged against the strong earthquake because of their high flexibility. However, some deformation or declination were reported dpending on retaining wall types and ground conditions behind retaining walls. Therefore, in order to evaluate the earthquake resistance and residual deformations of retaining walls using gabions widely observed in Nepal, full-scale shake table tests and laboratory tests were conducted in previous studies. In this study, elemental simulations for determination of the analysis parameters based on the results of triaxial compression tests were carried out to check the validity of parameters. Then, a series of numerical analysis using proposed model was performed to reproduce the dynamic behaviors of full-scale shake table tests and evaluate the earthquake resistance of retaining wall using gabions. According to the results of these numerical analysis, it was confirmed that proposal model adequately could simulate the dynamic response of retaining walls in the full-scale shake table tests. and it was also cleared that the stepwise type retaining wall was superior to that of vertical type from the standpoint of earthquake stability against sliding and overturning.

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
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