Comparison of Mechanical Properties between Grid Frame Core-Tube Structure and Tube Structure

2012 ◽  
Vol 446-449 ◽  
pp. 771-774
Author(s):  
Qi Ming Wang ◽  
Ke Jian Ma ◽  
Zhi Hua Chen ◽  
Tao Sun
Keyword(s):  
Mechanical Properties ◽  
Core Tube ◽  
Tube Structure

Comparison of Mechanical Properties between Grid Frame Core-Tube Structure and Tube Structure

2012 ◽  
Vol 446-449 ◽  
pp. 771-774
Author(s):  
Qi Ming Wang ◽  
Ke Jian Ma ◽  
Zhi Hua Chen ◽  
Tao Sun
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Structural System ◽  
Core Tube ◽  
Structure System ◽  
High Beam ◽  
High Stiffness ◽  
Tube Structure ◽  
New System ◽  
Better Than

Reinforced concrete grid frame core-tube structure system is a new system. This article draws the conclusion that grid frame core-tube has high stiffness and obvious space affection, and that its basic mechanics properties is better than frame core-tube structure and similar to tube structure through the comparison of two tube structure systems, which the Inner tube is similar to grid frame core-tube and the outer tubes respectively are frame and high beam - column frame tube. It puts forward some reasonable suggestions for the future designation of this structural system.

scholarly journals Damage Assessment of an SRC Frame-Core Tube Structure under the Action of a Main Aftershock Sequence

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Peng Wang ◽  
Qingxuan Shi ◽  
Feng Wang ◽  
Siusiu Guo
Keyword(s):  
Main Shock ◽  
Vulnerability Index ◽  
Aftershock Sequence ◽  
Time Interval ◽  
Demand Model ◽  
Core Tube ◽  
Repair Work ◽  
Damage Data ◽  
Probabilistic Seismic Demand ◽  
Tube Structure

Historical seismic damage data show that most strong earthquakes are accompanied by multiple intense aftershocks. In general, the time interval between the main shock and the aftershocks is relatively short, and structure repair work is often not completed before the aftershocks occur. For a structure that has suffered damage from the main shock, the aftershock will further aggravate the damage and even cause complete collapse. Based on the incremental dynamic analysis (IDA) method, this paper establishes a probabilistic seismic demand model for the SRC framework-core tube structure and plots the vulnerability curve of a structure under the action of the main aftershock sequence, which occurs following the actions of frequent earthquakes, fortification earthquakes, and rare earthquakes. The structure vulnerability matrix and the vulnerability index are used to evaluate the seismic performance of a structure. This study found that the occurrence of aftershocks leads the structure to a more unfavourable failure state. Taking the vulnerability index as an evaluation parameter, the structural vulnerability index when subjected to an intensity 8 earthquake under the action of the main aftershock is approximately 10% larger than under the action of a single main shock. Meanwhile, the SRC frame-core structure designed according to the current Chinese specifications meets the expected seismic fortification target, even after being acted upon by the main aftershock ground motion sequence.

scholarly journals D-Shaped Concrete-Filled Steel Tube Structure in Bridge Engineering

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Yuan Liu ◽  
Wei Wang ◽  
Changqing Wang ◽  
Shuosong Bi ◽  
Jianming Zhu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Interface State ◽  
Steel Tube ◽  
Bridge Engineering ◽  
Displacement Curve ◽  
Concrete Filled Steel Tube ◽  
The Impact ◽  
Tube Structure ◽  
Concrete Interface

With the continuous progress of the construction industry, the requirements for concrete in the bridge engineering are getting higher and higher. This research mainly discusses the detection of D-shaped concrete-filled steel tube structure in bridge engineering. In this study, the D-shaped concrete-filled steel tube member was used as the research object, and the load-displacement curve of the D-shaped concrete-filled steel tube compression-bending member was analyzed by the fiber model program. In the determination of the bonding state of the concrete-filled steel tube interface, in order to avoid the impact of mechanical and manual vibrating and the difference in concrete pouring methods on the test, the study uses C60 self-compacting microexpansion concrete. While pouring the specimens, three sets of cube specimens with a side length of 100 mm are reserved to determine the mechanical properties of the concrete simultaneously. In the temperature shock measurement of the concrete-filled steel tube specimen, the concrete-filled steel tube specimen was placed in a resistance heater during the simulated heating stage and heated to 20°C, 40°C, 60°C, and 80°C at room temperature. When measuring the mechanical properties of the specimen under the axial load, the specimen is heated from room temperature to the temperature of the entire section to reach 20°C, 40°C, 60°C, and 80°C. After preloading, the load of each level is 10t for continuous operation. Load and record the strain of the steel pipe and concrete under each load. If only the radial effect of the steel tube on concrete is considered, the temperature of 11°C, 20°C, and 80°C is the best ambient temperature. The results show that the D-shaped steel tube concrete interface state can provide a certain theoretical and experimental reference for the optimization of the steel tube concrete interface, ensuring the long-term working performance of the steel tube concrete under the harsh environment.

scholarly journals A Comparative Test Study on the Seismic Damage Sustained by Frame-Core Tube Structures

2019 ◽  
Vol 2019 ◽  
pp. 1-19
Author(s):  
Zuohua Li ◽  
Liang Chen ◽  
Jun Teng
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Optimization Model ◽  
Design Method ◽  
Seismic Damage ◽  
Comparative Test ◽  
Core Tube ◽  
Damage States ◽  
The Relationship ◽  
Tube Structure

The overall damage sustained by a structure can be controlled in the current damage-based seismic design, but the rationality of the relationship among the damage states of the components in the structure and the influences of those states on the overall seismic performance of the structure are currently ignored. In response to this problem, a comparative test was performed in this paper to study the seismic damage performances of two frame-core tube structure models, namely, an optimization model designed through the optimization of the component damage states to achieve the relationship among those damage states proposed in this paper and a normative model designed through the seismic design method based on Chinese codes. By comparing the experimental data of these two models, the relationship among the component damage states was discussed comprehensively, and the influences of those states on the overall seismic performance of the frame-core tube structure were analyzed. The proposed relationship among the component damage states in the optimization model can effectively limit the development of overall damage and improve the internal force response of the structure.

Dynamic Response of Damped Outrigger System for Frame-Core Tube Structure under Earthquake Loads

2011 ◽  
Vol 243-249 ◽  
pp. 1203-1209 ◽  
Author(s):  
Ze Yao Xu ◽  
Qian Lin ◽  
Jian Lin Zhang
Keyword(s):  
Shear Stiffness ◽  
Damping Force ◽  
Core Tube ◽  
Earthquake Loads ◽  
Tube Cross Section ◽  
Fluid Viscous Dampers ◽  
The Core ◽  
Story Drift ◽  
Energy Dissipation System ◽  
Tube Structure

The novel passive energy dissipation system named Damped Outrigger System for frame-core tube structure is introduced in recent years, in which the outrigger and perimeter columns are separate, and the vertically acting fluid-viscous dampers connect the end of each of the outrigger walls to the adjacent perimeter column. In this paper, a new simplified model of this structure is studied by considering the damping force and shear stiffness of the core tube and lateral stiffness of the frame with finite element method. The shear correction factor is also employed to consider the shape of the core tube cross section. The numerical example shows that the displacement and the inter-story drift of the structure are reduced effectively under earthquake loads. It means that the damped outrigger is an innovative solution to resisting earthquake loads for frame-core tube structure.

Sign in / Sign up

Export Citation Format

Share Document