Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

2019 ◽  
Vol 28 (15) ◽  
Author(s):  
Yunfeng Xiao ◽  
Lei Zeng ◽  
Yiguang Chen ◽  
Guofeng Du ◽  
Jicheng Zhang ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Hybrid Structure ◽  
Fragility Analysis ◽  
Cyclic Test ◽  
Seismic Fragility ◽  
Concrete Core ◽  
Core Tube

Super High-Rise Building (H =266m) of New Concrete Core Tube and Assembly Integral Spatial Steel Grid Cassette Tube in Tube Hybrid Structure Research and Design

2012 ◽  
Vol 204-208 ◽  
pp. 1179-1188
Author(s):  
Ke Jian Ma ◽  
Deng Peng ◽  
Shi Jie Qin
Keyword(s):  
Reinforced Concrete ◽  
Hybrid Structure ◽  
Tube Steel ◽  
Concrete Core ◽  
Core Tube ◽  
High Rise ◽  
High Rise Building ◽  
New Type ◽  
High Expenditure ◽  
Tube Structure

With the development of economy and society, urban construction rose to a new level in China. High-rise and super high-rise building increase rapidly. In the high-rise and super high-rise buildings (H≥150 m), the structural system usually adopts the conventional reinforced concrete, including frame tube structure, tube in tube structure, steel frame with reinforced concrete core tube hybrid structure and tube in tube steel - concrete mixed structure. These traditional structural systems often lead to the problems of fat beam fat column and high expenditure, which is not economic and unfriendly to the environment. This paper not only presents a new type of concrete core wall and prefabricated space steel grid cassette tube in tube structure system, but also discusses the superiority of the new type structure through the innovation and practice of a super high (266 m) five-star hotel and office building integrated engineering construction.

scholarly journals Seismic Evaluation of a Multitower Connected Building by Using Three Software Programs with Experimental Verification

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
Deyuan Zhou ◽  
Changtuan Guo ◽  
Xiaohan Wu ◽  
Bo Zhang
Keyword(s):  
Complex Structure ◽  
Time History ◽  
Hybrid Structure ◽  
Shake Table ◽  
Analysis Model ◽  
Seismic Evaluation ◽  
Shake Table Testing ◽  
Concrete Core ◽  
Core Tube ◽  
Function Modules

Shanghai International Design Center (SHIDC) is a hybrid structure of steel frame and reinforced concrete core tube (SF-RCC). It is a building of unequal height two-tower system and the story lateral stiffness of two towers is different, which may result in the torsion effect. To fully evaluate structural behaviors of SHIDC under earthquakes, NosaCAD, ABAQUS, and Perform-3D, which are widely applied for nonlinear structure analysis, were used to perform elastoplastic time history analyses. Numerical results were compared with those of shake table testing. NosaCAD has function modules for transforming the nonlinear analysis model to Perform-3D and ABAQUS. These models were used in ABAQUS or Perform-3D directly. With the model transformation, seismic performances of SHIDC were fully investigated. Analyses have shown that the maximum interstory drift can satisfy the limits specified in Chinese code and the failure sequence of structural members was reasonable. It meant that the earthquake input energy can be well dissipated. The structure keeps in an undamaged state under frequent earthquakes and it does not collapse under rare earthquakes; therefore, the seismic design target is satisfied. The integrated use of multisoftware with the validation of shake table testing provides confidence for a safe design of such a complex structure.

Dynamic Characteristic and Aseismatic Analysis of Tall Structures with Outriggers

2008 ◽  
Vol 400-402 ◽  
pp. 607-612
Author(s):  
Yu Chen ◽  
Pu Sheng Shen
Keyword(s):  
Reinforced Concrete ◽  
Response Spectrum ◽  
Time History ◽  
Free Vibrations ◽  
Steel Frame ◽  
Mode Analysis ◽  
Complete Analysis ◽  
Concrete Core ◽  
Core Tube ◽  
Finite Element Software

Based on the finite element software ETABS, the effect of outriggers on the seismic response of a 50-story steel frame-reinforced concrete core tube structure was analyzed in this paper. Periods of free-vibrations were obtained from mode analysis. Response spectrum on the seismic properties was discussed. Elastic time history method was used to get complete analysis of the structure adopting four seismic waves. Structural horizontal displacement, drift angle, internal force of components and the distribution of internal forces between inner tube and outer frame under earthquake were studied. The rational quantity and locations of outriggers were considered. Further research in elastic time history was presented considering the influence of quantity of outriggers when outriggers were all set in “reasonable locations”. Some suggestions about steel frame-reinforced concrete core tube structures with outriggers in earthquake areas were given.

Multi-Objective Optimization Design of Hybrid Structure

2011 ◽  
Vol 243-249 ◽  
pp. 20-25
Author(s):  
Shan Suo Zheng ◽  
Zhi Qiang Li ◽  
Yi Hu ◽  
Qing Lin Tao ◽  
Wei Wang
Keyword(s):  
Reinforced Concrete ◽  
Optimization Design ◽  
Failure Modes ◽  
Hybrid Structure ◽  
Wall Structure ◽  
Reinforced Concrete Frame ◽  
Core Tube ◽  
Structure Damage ◽  
Concrete Frame ◽  
The Cost

The primary goal of failure modes-based optimization design which is to study the performance of structure without shocking absorption device is to transform the non-ideal failure modes of structure into the ideal failure modes, and then a small probability of the structure damage can be obtained. Although the study of this field is significant, no paper has so far attempted to study. Taking the cost of the structure into consideration, this paper aims at the failure modes-based optimization design. Therefore, an optimal approach based on failure modes with the ability to limit the cost is proposed. The procedure to obtain the failure modes-based optimization includes two phases, the concrete optimization and the shaped steel optimization. At last a reinforced concrete frame-shear wall structure is cited to verify the method developed. It is concluded that the method can supply an effective way to reduce both the damage and the cost of steel reinforced concrete framework-core tube structure.

Seismic Behavior of Composite High-Rise Buildings with SRC Column, Steel Beam and RC Core Tube

2012 ◽  
Vol 204-208 ◽  
pp. 2590-2594
Author(s):  
Bin Zhao ◽  
Juan He
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Shake Table Test ◽  
Scale Model ◽  
Steel Beam ◽  
Shake Table ◽  
Concrete Core ◽  
Core Tube ◽  
High Rise ◽  
High Rise Building

In this research, a reduced scale model of the composite high-rise building with steel reinforced concrete column, steel beam and reinforced concrete core tube was designed and tested by using the shake table test technology. The acceleration and displacement of the model were measured during the tests. The cracking pattern and failure mechanism were illustrated. Above the shake table test, the finite element analysis of the test mode was carried out. The main effort of the numerical analysis was focused on the selection of the nonlinear models. Based on the experiment results and the strategy of considering nonlinear property of the beam-column joint and the short beam of the concrete core wall were proposed. It is proved that the proposed strategy is effective and economical for seismic behavior assessment of such composite high-rise building structure system.

Seismic Fragility Analysis of Reinforced Concrete Frames with Service Life

2012 ◽  
Vol 446-449 ◽  
pp. 2313-2316
Author(s):  
Li Li Yuan ◽  
Jian Min Wang ◽  
Neng Jun Wang ◽  
Wen Ting Jiang
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Concrete Frames ◽  
Reinforced Concrete Frames
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