Experimental Studies on Earthquake Response Behavior of Cylindrical Tanks

A series of dynamic tests for the seismic behavior of ground-supported liquid storage tanks are evaluated and compared with previous theoretical studies. Two model tanks were subjected to shaking table tests with particular attention to the influence of base fixity and geometric imperfections in the tank walls. Test results support numerical calculations which show that base fixity conditions strongly influence the seismic response of tanks. Although high radial accelerations are induced by the imperfections, they are not found to be significant factors in tank failure.

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Experimental Studies of Single-Layer Reticulated Domes with Isolated Supports

Shock and Vibration ◽

10.1155/2018/6041878 ◽

2018 ◽

Vol 2018 ◽

pp. 1-15 ◽

Cited By ~ 1

Author(s):

Guibo Nie ◽

Kun Liu

Keyword(s):

Seismic Behavior ◽

Damping Ratio ◽

Experimental Studies ◽

Three Dimensional ◽

Single Layer ◽

Shaking Table ◽

Dynamic Responses ◽

Shaking Table Tests ◽

Isolation Effects ◽

Reticulated Domes

To study the seismic behavior of a single-layer reticulated dome subjected to severe earthquakes, a series of shaking table tests were conducted for this paper. Seismic responses including the acceleration, displacement, and strains gathered at the members and nodes were discussed. The dynamic characteristics, including structure frequencies and damping ratio, were obtained through the results under the input excitation of white noise and the fast sine sweeping with different amplitudes. Various isolation devices usually installed in the upper portion of the structures have been widely used to reduce the dynamic responses for more than three decades. However, these isolation devices deal mostly with either horizontal isolation or vertical isolation, which is not applicable for synchronous isolation in both horizontal and vertical isolation. Therefore, an innovative isolated support for three-dimensional isolation was invented. In order to understand the earthquake-isolation effects of a single-layer reticulated dome with the isolated support, a series of shaking table tests were conducted. The dynamic behavior of the structure was then investigated and discussed using the acceleration and displacement responses of the tested structures with or without the isolated supports. The experimental results show that the isolated support invented in this study had a remarkable earthquake-isolation action in both horizontal and vertical isolation.

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Seismic Response of Pile Groups Improved with Deep Cement mixing Columns in Liquefiable Sand: Shaking Table Tests

Canadian Geotechnical Journal ◽

10.1139/cgj-2020-0505 ◽

2021 ◽

Author(s):

Dingwen Zhang ◽

Anhui Wang ◽

Xuanming Ding

Keyword(s):

Seismic Behavior ◽

Lateral Displacement ◽

Bending Moment ◽

Pile Group ◽

Shaking Table ◽

Excess Pore Pressure ◽

Shaking Table Tests ◽

Pile Groups ◽

Acceleration Response ◽

Table Model

A series of shaking table model tests were performed to examine the effects of deep cement mixing (DCM) columns with different reinforcement depths on the seismic behavior of a pile group in liquefiable sand. Due to the DCM column reinforcement, the fundamental natural frequency of the model ground increases noticeably. The excess pore pressure of soils reduces with the increase of reinforcement depths of the DCM columns. Before liquefaction, the acceleration response of soils in the improved cases is obviously lower than that in the unimproved case, but the acceleration attenuation is greater after liquefaction in the unimproved case. Moreover, the lateral displacement of the superstructure, the settlement of the raft, and the bending moment of the piles in the improved cases are significantly reduced compared to those in the unimproved case, and the reduction ratios rise with the increase of reinforcement depth of the DCM columns. However, reinforcement by the DCM columns may result in the variation of the location of the maximum moment that occurs in the pile.

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Shaking table tests on seismic behavior of the underground loess cave of earth building of traditional dwellings

Engineering Structures ◽

10.1016/j.engstruct.2020.110221 ◽

2020 ◽

Vol 207 ◽

pp. 110221

Author(s):

Jianyang Xue ◽

Xiangbi Zhao ◽

Fengliang Zhang ◽

Dan Xu ◽

Xiaofeng Hu ◽

...

Keyword(s):

Seismic Behavior ◽

Shaking Table ◽

Shaking Table Tests

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Shaking table test on building in masonry structure with construction waste recycled brick

World Journal of Engineering ◽

10.1260/1708-5284.11.4.357 ◽

2014 ◽

Vol 11 (4) ◽

pp. 357-364

Author(s):

Hui Su ◽

Jian Wang ◽

Xinpei Jiang ◽

Yang Tan

Keyword(s):

Seismic Behavior ◽

Shaking Table Test ◽

Concrete Block ◽

Masonry Structure ◽

Recycled Aggregate Concrete ◽

Shaking Table ◽

Recycled Aggregate ◽

Test Results ◽

Scaled Model ◽

Construction Waste

Based on the shake table test on "tie column-ring beam-cast-in-place slab" construction waste recycled brick masonry structure, a 1/3 scaled model of 4 stories is tested to analyze the seismic behavior of the multi-storey masonry structure. The test is conducted with EL-Centro seismic wave, Taft wave and artificial wave to simulate the damages observed and the seismic response under different earthquake levels. On the basis of test results, the seismic performance of the model is good and the overall structure could satisfy seismic fortification requirements in the region of intensity 8. At the same time, there was no obvious difference between this masonry structure and recycled aggregate concrete block masonry structure. The lintel of the door and window damage seriously. The base damages more easily than the superstructure. Masonry structure with construction waste recycled brick can satisfy the requirement of the masonry structure buildings in eight degree of aseismatic design area.

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Investigation on Seismic Behavior of Recycled Aggregate Concrete Structures under Dynamic Loadings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.772.149 ◽

2013 ◽

Vol 772 ◽

pp. 149-155

Author(s):

Chang Qing Wang

Keyword(s):

Seismic Behavior ◽

Fatigue Behavior ◽

Experimental Studies ◽

Concrete Structures ◽

Recycled Aggregate Concrete ◽

Shaking Table ◽

Frame Structure ◽

Recycled Aggregate ◽

Scale Model ◽

Aggregate Concrete

Based on the ever finished investigations of physical and mechanical properties of recycled aggregate concrete (RAC), and a series of experimental studies on the durability, the fatigue behavior, mechanical behavior and the seismic behavior of RAC components. A full scale model of a one-storey block masonry structure with tie column + ring beam + cast-in-place slab system and a one fourth scaled model of a 6-storey frame structure, which are made of reinforced recycled aggregate concrete, are tested on a shaking table by subjecting it to a series of simulated seismic ground motions, and the seismic behaviors of the RAC structures were experimentally investigated. The dynamic characteristics and the seismic response were analyzed and discussed. The overall seismic performance of RCA structures are evaluated, the analysis results show that the recycled aggregate concrete structures with proper design exhibits good seismic behavior and can resist the earthquake attacks under different earthquake levels in this study. It is feasible to apply and popularize the RAC block masonry buildings less than 2 stories and the RAC frame buildings less than 6 stories in the region where the seismic fortification intensity is 8.

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