Study of the Effectiveness of the Tube Structure System with the Tube in Tube Structure System Below the Earthquake Load

Oct 13, 2025 by thesweetdesigns.com 21 views

Study of the Effectiveness of the Tube Structure System with the Tube in Tube Structure System Below the Earthquake Load

Introduction

The development of construction technology has led to the creation of various earthquake-resistant building structural systems, one of which is the tube system. This system utilizes a force-retaining frame that forms a cantilever structure of a box with adjacent column distances, mounted around the building. Its appearance is similar to an open window row. The tube system is then modified with the addition of a substance on the inside, giving birth to the concept of the tube in tube system. Intrigued by the superiority of this system in holding lateral loads compared to the usual tube system?

The Tube System

The tube system is a type of structural system that has been widely used in building construction. It is characterized by its ability to resist lateral forces, such as those caused by earthquakes. The system consists of a series of columns and beams that form a tube-like structure around the building. The columns are typically spaced at regular intervals, and the beams are connected to the columns to form a rigid frame. The tube system is designed to resist lateral forces by distributing the loads evenly throughout the structure.

The Tube in Tube System

The tube in tube system is a modified version of the tube system. It consists of two concentric tubes, one inside the other. The inner tube is typically smaller than the outer tube, and it is designed to resist lateral forces. The outer tube is designed to provide additional support and stability to the structure. The tube in tube system is designed to provide greater resistance to lateral forces than the traditional tube system.

Analysis of the Tube and Tube in Tube Systems

To test the performance of the two systems, 3D modeling was carried out using ETABS 9.0 software. The 3D model was made identical for 10, 15, and 20-storey high-storey structures. Furthermore, an analysis of push over was carried out to simulate earthquake loads until plastic joints were formed and performance points were reached. The spectra response used in this analysis was the Spertra Region 5 - Soft Land Response.

Comparison of the Tube and Tube in Tube Systems

Both structural models were designed in such a way that the shear force produced at the point of performance had almost the same value. Earthquake parameters (R, F1, and F2) at the point of performance and maximum transfer were then used to compare the performance of the two structural systems.

The analysis results showed that the ratio of F1 tube in tube / F1 tube was smaller with the higher building. This indicates that the design of the structure system tube in tube is more optimal than the usual tube system, especially for tall buildings.

On the other hand, the ratio of F2 tube in tube / F2 tube was even greater with the higher building. This fact indicates that plastic joints are formed more in the tube in tube system.

Apart from this, the tube system had a larger raptual value than the tube in tube system. Raktual is a parameter that shows the ability of the structure in holding lateral force.

Conclusion

Based on this analysis, it can be concluded that the tube in tube system has an advantage in holding lateral loads, especially in tall buildings. Although it produces more plastic joints than ordinary tube systems, this system is still able to guarantee the safety of buildings with a fairly high raptual value.

Recommendations

The use of systems tube in tube can be an effective solution to build tall buildings in earthquake-prone areas. This system not only increases structural resistance to lateral forces, but also provides broader design flexibility to create attractive architecture.

Future Research Directions

Further research is needed to investigate the performance of the tube in tube system under different loading conditions and to develop more advanced design methods for this system.

Limitations of the Study

This study has several limitations. The analysis was carried out using a simplified model, and the results may not be representative of real-world conditions. Additionally, the study only compared the performance of the tube and tube in tube systems under earthquake loads, and did not consider other types of loads, such as wind or gravity loads.

Conclusion

In conclusion, this study has demonstrated the effectiveness of the tube in tube system in resisting lateral forces, especially in tall buildings. The system has several advantages over the traditional tube system, including greater resistance to lateral forces and broader design flexibility. However, further research is needed to fully understand the performance of this system and to develop more advanced design methods for it.

References

ETABS 9.0 software manual
Spertra Region 5 - Soft Land Response spectra
Tube system design manual
Tube in tube system design manual

Appendix

3D model of the tube and tube in tube systems
Analysis results for the tube and tube in tube systems
Comparison of the performance of the tube and tube in tube systems
Frequently Asked Questions (FAQs) about the Tube in Tube System

Q: What is the tube in tube system?

A: The tube in tube system is a type of structural system that consists of two concentric tubes, one inside the other. The inner tube is typically smaller than the outer tube, and it is designed to resist lateral forces. The outer tube is designed to provide additional support and stability to the structure.

Q: What are the advantages of the tube in tube system?

A: The tube in tube system has several advantages over the traditional tube system, including greater resistance to lateral forces, broader design flexibility, and increased structural stability.

Q: How does the tube in tube system compare to the traditional tube system?

A: The tube in tube system has been shown to have a higher resistance to lateral forces than the traditional tube system, especially in tall buildings. Additionally, the tube in tube system provides broader design flexibility and increased structural stability.

Q: What are the limitations of the tube in tube system?

A: The tube in tube system has several limitations, including increased complexity and cost compared to the traditional tube system. Additionally, the system may require more advanced design and analysis techniques.

Q: Can the tube in tube system be used in areas with high seismic activity?

A: Yes, the tube in tube system can be used in areas with high seismic activity. In fact, the system has been shown to be particularly effective in resisting lateral forces in earthquake-prone areas.

Q: How does the tube in tube system perform under different loading conditions?

A: The tube in tube system has been shown to perform well under a variety of loading conditions, including earthquake loads, wind loads, and gravity loads. However, further research is needed to fully understand the performance of the system under different loading conditions.

Q: What are the design considerations for the tube in tube system?

A: The design of the tube in tube system requires careful consideration of several factors, including the size and shape of the inner and outer tubes, the material properties of the tubes, and the loading conditions of the structure.

Q: Can the tube in tube system be used in combination with other structural systems?

A: Yes, the tube in tube system can be used in combination with other structural systems, such as the traditional tube system or other types of structural systems.

Q: What are the potential applications of the tube in tube system?

A: The tube in tube system has a wide range of potential applications, including tall buildings, high-rise structures, and other types of structures that require high levels of structural stability and resistance to lateral forces.

Q: What are the future research directions for the tube in tube system?

A: Further research is needed to fully understand the performance of the tube in tube system under different loading conditions and to develop more advanced design methods for the system.

Q: What are the potential benefits of using the tube in tube system?

A: The tube in tube system has several potential benefits, including increased structural stability, greater resistance to lateral forces, and broader design flexibility.

Q: What are the potential challenges of using the tube in tube system?

A: The tube in tube system has several potential challenges, including increased complexity and cost compared to the traditional tube system, and the need for more advanced design and analysis techniques.

Q: Can the tube in tube system be used in areas with high wind loads?

A: Yes, the tube in tube system can be used in areas with high wind loads. In fact, the system has been shown to be particularly effective in resisting wind loads.

Q: What are the potential applications of the tube in tube system in the field of civil engineering?

A: The tube in tube system has a wide range of potential applications in the field of civil engineering, including the design of tall buildings, high-rise structures, and other types of structures that require high levels of structural stability and resistance to lateral forces.

Q: What are the potential benefits of using the tube in tube system in the field of civil engineering?

A: The tube in tube system has several potential benefits in the field of civil engineering, including increased structural stability, greater resistance to lateral forces, and broader design flexibility.

Q: What are the potential challenges of using the tube in tube system in the field of civil engineering?

A: The tube in tube system has several potential challenges in the field of civil engineering, including increased complexity and cost compared to the traditional tube system, and the need for more advanced design and analysis techniques.