scholarly journals Seismic analysis method of equipment–high rise structure–nonlinear soil system

2018 ◽  
Vol 10 (10) ◽  
pp. 168781401880733
Author(s):  
Nan Jiang ◽  
Lanfang Luo ◽  
Chongxiang Zhang
Keyword(s):  
Numerical Computation ◽  
Shaking Table Test ◽  
Seismic Analysis ◽  
Calculation Model ◽  
Shaking Table ◽  
Dynamic Responses ◽  
Computation Method ◽  
Soil System ◽  
High Rise ◽  
Time Histories

Based on the principle of real-time substructure shaking table test, an interactive numerical computation method which built the calculation model of each substructure in different software programs was proposed for seismic analysis of equipment–high rise structure–soil systems in order to account the effect of nonlinear soil. Considering that the response of soil under strong earthquakes does not totally enter the nonlinear stage, a locally nonlinear soil model was introduced as the numerical substructure, and the equipment–high rise structure subsystem was treated as an experimental substructure in this method. The equation of motion for the equipment–high rise structure–soil system was derived through a combination of the branch modal substructure and linear–nonlinear hybrid constraint modal substructure approaches. A 13-layer steel framework system model is used as an analytical example that the equipment–high rise structure system and local nonlinear soil computing model are built by MATLAB and ANSYS, respectively. The time histories of the system dynamic responses were obtained by interactive numerical computation, to investigate the effects of equipment–high rise structure–soil interaction on the seismic performance of the equipment and structure.

scholarly journals Application of Equivalent Simplified Calculation Model of Isolated Structure in Super High-rise Building

2021 ◽  
pp. 115-123
Author(s):  
Yingjun Wang, Tianli Chen
Keyword(s):  
Shaking Table Test ◽  
Time History ◽  
Calculation Model ◽  
Shaking Table ◽  
Width Ratio ◽  
Vertical Stiffness ◽  
High Rise ◽  
High Rise Building ◽  
Ratio Limit ◽  
Simplified Calculation

In this paper, the application of equivalent simplified calculation model of isolated structure in super high-rise building is studied. In this paper, the characteristics of isolation structures with different height width ratio are analyzed, and the relationship curve between the limit value of height width ratio of isolation structure and the distance of isolation support is established. From the curve, we can estimate the limit height of the isolated structure when the bearing does not produce tensile stress under different seismic intensities. This paper also analyzes the influencing factors of the height width ratio limit, and puts forward the method of increasing the height width ratio limit. In this paper, a vertical stiffness correction model of isolation bearing is proposed. Compared with the shaking table test results and time history analysis, the modified model can truly reflect the mechanical properties of the isolation bearing.

scholarly journals Seismic Response of Prestressed Anchors with Frame Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Shuaihua Ye ◽  
Zhuangfu Zhao
Keyword(s):  
Seismic Response ◽  
Shaking Table Test ◽  
Coupling Effect ◽  
Soil Mass ◽  
Calculation Model ◽  
Shaking Table ◽  
Frame Structure ◽  
Dynamic Calculation ◽  
Concentrated Mass ◽  
Linear Spring

Based on the equivalent mass-spring model and considering the coupling effect between creep soil and prestressed anchors, the dynamic calculation model of prestressed anchors with frame structure is established. The soil mass is expressed in the form of concentrated mass. The action of the frame structure on the soil is treated as a parallel coupling of a linear spring and a linear damper, and the free section of the anchor is treated as a linear spring. Considering the creep characteristics, the soil is regarded as a Generalized Kelvin body and the anchoring section of the anchor is regarded as an equivalent spring body, which are coupled in parallel. Considering the effect of slope height, the dynamic calculation model is solved and the seismic response is analyzed. Finally, an engineering example is used to verify the calculation method in this paper, and the results are compared with the shaking table test and numerical simulation. It shows that the calculation model proposed in this paper is safe and reasonable for the seismic design and analysis of the slope supported by prestressed anchors with frame structure.

scholarly journals Shaking Table Model Test and Seismic Performance Analysis of a High-Rise RC Shear Wall Structure

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Shujin Li ◽  
Cai Wu ◽  
Fan Kong
Keyword(s):  
Seismic Performance ◽  
Model Test ◽  
Shaking Table Test ◽  
Technical Specification ◽  
Shaking Table ◽  
Scale Model ◽  
Wall Structure ◽  
High Rise ◽  
Table Model ◽  
Shaking Table Model Test

A building developed by Wuhan Shimao Group in Wuhan, China, is a high-rise residence with 56 stories near the Yangtze River. The building is a reinforced concrete structure, featuring with a nonregular T-type plane and a height 179.6 m, which is out of the restrictions specified by the China Technical Specification for Concrete Structures of Tall Building (JGJ3-2010). To investigate its seismic performance, a shaking table test with a 1/30 scale model is carried out in Structural Laboratory in Wuhan University of Technology. The dynamic characteristics and the responses of the model subject to different seismic intensities are investigated via the analyzing of shaking table test data and the observed cracking pattern of the scaled model. Finite element analysis of the shaking table model is also established, and the results are coincident well with the test. An autoregressive method is also presented to identify the damage of the structure after suffering from different waves, and the results coincide well with the test and numerical simulation. The shaking table model test, numerical analysis, and damage identification prove that this building is well designed and can be safely put into use. Suggestions and measures to improve the seismic performance of structures are also presented.

A substructure shaking table test for reproduction of earthquake responses of high-rise buildings

2009 ◽  
Vol 38 (12) ◽  
pp. 1381-1399 ◽  
Author(s):  
Xiaodong Ji ◽  
Kouichi Kajiwara ◽  
Takuya Nagae ◽  
Ryuta Enokida ◽  
Masayoshi Nakashima
Keyword(s):  
Shaking Table Test ◽  
Shaking Table ◽  
High Rise

Effects of Soil on the Dynamic Response of Liquid-Tank Systems

1990 ◽  
Vol 112 (2) ◽  
pp. 118-123
Author(s):  
N. Hori
Keyword(s):  
Shaking Table Test ◽  
Ritz Method ◽  
Elastic Shell ◽  
Elastic Half Space ◽  
Dynamic Interaction ◽  
Shaking Table ◽  
Elastic Response ◽  
Soil System ◽  
Elastic Tank ◽  
Impedance Functions

A procedure is presented for the subsystem approach of a liquid-tank-soil system subjected to horizontal and vertical earthquake excitations by the Rayleigh-Ritz method. The dynamic interaction forces between the tank and soil are represented by the impedance functions obtained from the boundary element method. The tank is modeled as an elastic shell and the base of the tank is considered as a surface rigid disk resting on an elastic half-space or a layered elastic medium. A shaking table test of a liquid-elastic tank on an elastic soil model was carried out to verify experimentally the dynamic interaction. The numerical results show that the elastic response of the tank decreases due to the effect of radiation damping in the foundation. Furthermore, the experimental results show that the response of the tank decreases due to stiffness of the soil.

3D Temporal Characteristics of Scale Model Responses in Shaking Table Test

2010 ◽  
Vol 163-167 ◽  
pp. 3977-3980
Author(s):  
Yan Ru Wang ◽  
Mao Yu Zhang ◽  
Jun Wu Dai ◽  
Mai Tong ◽  
George C. Lee
Keyword(s):  
Velocity Vector ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Scale Model ◽  
Euclidean Norm ◽  
Temporal Characteristics ◽  
High Rise ◽  
Acceleration Vector ◽  
Tangential Acceleration ◽  
Normal Acceleration

In this paper, we present the analysis on 3D temporal characteristics of a scale model for high-rise structure. Based on the parameter of instantaneous tangential acceleration aT, normal acceleration aN, Euclidean norm of acceleration vector |a|, Euclidean norm of velocity vector |v|, temporal curvature κ, κt, Some interesting relationships and information in depth between them would be obtain.

Seismic Performance Evaluation of a High-Rise Building with Lapping Transfer Columns by Shaking Table Tests

2010 ◽  
Vol 163-167 ◽  
pp. 1281-1285
Author(s):  
Bin Wang ◽  
Huan Jun Jiang ◽  
Jian Bao Li ◽  
Wen Sheng Lu ◽  
Xi Lin Lu
Keyword(s):  
Seismic Performance ◽  
Shaking Table Test ◽  
Dynamic Properties ◽  
Shaking Table ◽  
Vertical Force ◽  
Scaled Model ◽  
Seismic Performance Evaluation ◽  
High Rise ◽  
High Rise Building ◽  
Global And Local

The reinforced concrete (RC) frame-tube structure considered in the study has two towers with lapping transfer columns. The lapping transfer columns, considering aesthetic requirement in elevation, lead to a complex vertical force transfer system. The large irregularity in elevation, according to Chinese code, necessitates a detailed study. A 1/15-scaled model of the high-rise building was tested on a shaking table to evaluate its seismic performance. The model was subjected to earthquake inputs representing frequent, basic, rare, and extremly rare earthquakes. The results of shaking table test in terms of the global and local responses as well as the dynamic properties are presented. The tests demonstrate that the designed structural system satisfies the pre-defined performance objectives and the lapping transfer columns have good seismic peformance. To better control seismic damages of the building, some suggestions for improving the design of this structure are also put forward at last.

The Fracture Limit of Steel-Frame Members Under Dynamic Repeated Loads Through the Shaking Table Test

2018 ◽  
Author(s):  
Kensuke Shiomi ◽  
Yusuke Wada
Keyword(s):  
Plastic Deformation ◽  
Dynamic Load ◽  
Evaluation Method ◽  
Shaking Table Test ◽  
Seismic Analysis ◽  
Steel Frame ◽  
Shaking Table ◽  
Test Results ◽  
Structural Members ◽  
Worst Case

Recently, much larger earthquakes are considered in the seismic designs of steel-frame structures in Japan. Under these severe ground motions, it is expected that not only the elasto-plastic deformation but also the fracture of the structural members could occur during the earthquakes. And through these situations, the more advanced seismic design or evaluation method which allow the partial destruction inside the structure and prevent from the worst-case scenario like the whole collapse are coming to be demanded. One of the ways to achieve this demand is considering the effects of not only the elasto-plastic deformation but also the fracture of structural members in the seismic analysis. In order for that, it is important to clarify the fracture limit of steel-frame members precisely under the dynamic load. Many static tests to clarify the members’ ultimate behavior were conducted in the past, but the dynamic tests were not well enough. In this research, the vibration tests were conducted to clarify the fracture limit of steel-frame members under the dynamic load. The behavior of the steel-frame members until the fracture was obtained by applying the repeated dynamic bending deformation with the shaking table. Also, The FEM analysis for the shaking table test results was conducted. Through the tests and the analysis study which simulates the test results, the mechanism of the member fracture occurred in the test under the dynamic loads were examined.

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