Comparison of Seismic Responses of Updated Lumped-Mass Stick Model and Shaking Table Test Results

Dynamic equations are presented that have been deduced for a real-time dynamic substructuring shaking table test of an equipment-structure system, based on the branch mode substructure method. The equipment is adopted as the experimental substructure, which is loaded by the shaking table, while the structure is adopted as the numerical substructure. Real-time data communication occurs between the two substructures during the test. A real-time seismic energy calculation method was proposed for the calculation of energy responses, both in the experimental substructure and the numerical substructure. Taking a representative four-story steel frame/equipment model, real-time dynamic substructuring shaking table tests and overall model tests were executed. The proposed real-time dynamic substructuring shaking table testing method was verified by comparing the test results with shaking table test results for the overall model. The energy responses of each component in the equipment-structure system, using different connection types, also were studied. Changes in the connection types can lead to changes in the energy responses of the equipment-structure system, especially with respect to the equipment. The choice of the connection for the equipment-structure coupled system should take into account the operational performance objective of the equipment.

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Research on Bending Rigidity at Flange Connections of UHV Composite Electrical Equipment

Shock and Vibration ◽

10.1155/2020/2031357 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10

Author(s):

Haibo Wang ◽

Yongfeng Cheng ◽

Zhicheng Lu ◽

Zhubing Zhu ◽

Shujun Zhang

Keyword(s):

Numerical Simulation ◽

Seismic Performance ◽

Shaking Table Test ◽

Effective Means ◽

Electrical Equipment ◽

Shaking Table ◽

Calculation Formula ◽

Test Results ◽

Bending Rigidity ◽

Earthquake Simulation

Pillar electrical equipment is an important part of substations. The application of composite materials in pillar equipment can facilitate the improvement of the seismic performance of electrical equipment. In this paper, the test of elastic modulus and bending rigidity was conducted for individual composite elements in insulators and arresters, and the calculation formula for bending rigidity at the composite flange cementing connections was put forward. The numerical simulation model for the earthquake simulation shaking table test of ±1,100 kV composite pillar insulators was established, in which the bending rigidity value for the flange cementing part was obtained by the test or calculation formula. The numerical simulation results were compared with the earthquake simulation shaking table test results, the dynamic characteristics and seismic response of the model were compared, respectively, the validity of the proposed calculation formula for flange bending rigidity of composite cementing parts was verified, and a convenient and effective means was provided for calculating the seismic performance of composite electrical equipment.

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Shaking Table Test of Quarter Scale 20 Story RC Moment Frame Building Subjected to Long Period Ground Motions

Journal of Disaster Research ◽

10.20965/jdr.2016.p0097 ◽

2016 ◽

Vol 11 (1) ◽

pp. 97-105 ◽

Cited By ~ 1

Author(s):

Kuniyoshi Sugimoto ◽

◽

Kenji Yonezawa ◽

Hideo Katsumata ◽

Hiroshi Fukuyama ◽

...

Keyword(s):

Shaking Table Test ◽

Shaking Table ◽

Test Results ◽

Nonlinear Fem ◽

Moment Frame ◽

Building Model ◽

Long Period ◽

Frame Building ◽

Long Duration ◽

Current Design

Shaking table test of a quarter-scale 20-story reinforced concrete building model was carried out. Employed input waves were kinds of long period and long duration ground motion. Test results showed that structural slabs were fully effective for building strength, which could be expressed in detailed analysis using nonlinear FEM. However, the observed hysteretic damping after yielding was fairly smaller than the expected by the current design custom, which caused smaller and unsafe estimated response than that observed in the test.

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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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Effect of Roof and Diaphragm Connectivity on Dynamic Behaviour of the PP-band Retrofitted Adobe Masonry Structures

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.12247 ◽

2018 ◽

Author(s):

Navaratnarajah Sathiparan

Keyword(s):

Shaking Table Test ◽

Masonry Wall ◽

Shaking Table ◽

Experimental Program ◽

Masonry Structures ◽

Test Results ◽

Structural Components ◽

Masonry Unit ◽

Seismic Safety ◽

Lateral Drift

This paper discusses the shaking table test results of three PP-band (Polypropylene band) retrofitted quarter scale one-story masonry house models with different roof conditions. Better connections between masonry wall and roof connection are one factor to improve the seismic safety of the masonry houses. Past studies show that PP-band retrofitting improves the integrity of structural components and prevent the collapse of masonry structures during an earthquake. Although the effect of masonry unit type, surface plastering, the pitch of the PP-band mesh, PP-band connectivity in mesh and tightness of the mesh attachment to walls were studied by experiment program, the effect of the roof and its diaphragm connectivity on PP-band retrofitted masonry structure is nonexistent. Therefore, an experimental program was designed and executed for an understanding the effect of the roof and its connection on the dynamic behavior of the PP-band retrofitted box-shaped masonry house models. Results reveal that the PP-band retrofitted models with proper roof diaphragm improves the seismic behavior with respect to lateral drift, shear resistance and ductility.

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Shaking Table Test of a RC Frame with EPSC Latticed Concrete Infill Wall

Shock and Vibration ◽

10.1155/2017/7163560 ◽

2017 ◽

Vol 2017 ◽

pp. 1-18 ◽

Cited By ~ 1

Author(s):

Baizan Tang ◽

Xiaojun Li ◽

Su Chen ◽

Lihong Xiong

Keyword(s):

Shaking Table Test ◽

Comprehensive Evaluation ◽

Shaking Table ◽

Wall Material ◽

Rc Frame ◽

Seismic Responses ◽

Concrete Wall ◽

Infill Wall ◽

Infill Walls ◽

Rc Shear Wall

The expansive polystyrene granule cement (EPSC) latticed concrete wall is a new type of energy-saving wall material with load-bearing, insulation, fireproof, and environmental protection characteristics. A series of shaking table tests were performed to investigate the seismic behavior of a full-scale reinforced concrete (RC) frame with EPSC latticed concrete infill wall, and data obtained from the shaking table test were analyzed. The experimental results indicate that the designed RC frame with EPSC latticed concrete infill wall has satisfactory seismic performance subjected to earthquakes, and the seismic responses of the model structure are more sensitive to input motions with more high frequency components and long duration. The EPSC latticed concrete infill wall provided high lateral stiffness so that the walls can be equivalent to a RC shear wall. The horizontal and vertical rebar, arranged in the concrete lattice beam and column, could effectively restrain the latticed concrete infill wall and RC frame. To achieve a more comprehensive evaluation on the performance of the RC frame with latticed concrete infill walls, further research on its seismic responses is expected by comparing with conventional infill walls and nonlinear analytical method.

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