MACAM-MACAM SISTEM STRUKTUR BANGUNAN TINGGI

Summary

In this video, the speaker introduces various types of loads and structural systems used in tall buildings. The video begins by explaining vertical, horizontal, and special loads, such as dead load, live load, wind load, earthquake load, and impact load. It then discusses several structural systems like rigid frame, sirwal system, core wall system, and hybrid systems, which are designed to support these loads. The video emphasizes the importance of structural integrity and the need for further study in civil engineering to fully understand these complex systems used in modern skyscrapers.

Takeaways

• 😀 The video discusses various types of structural systems used in tall buildings, highlighting different ways to handle various loads.
• 😀 Before diving into structural systems, the video briefly touches on the types of loads on tall buildings, including vertical, horizontal, and special loads.
• 😀 Vertical loads consist of dead loads (building's own weight), live loads (movable objects like furniture), and snow loads.
• 😀 Horizontal loads include wind loads and earthquake loads, which push buildings in different directions, potentially shifting their structures.
• 😀 Special loads refer to unique forces such as impact loads (e.g., from an airplane crash) and blast loads (e.g., from explosions).
• 😀 The video mentions that the structural systems discussed are general overviews and more detailed information should come from civil engineers.
• 😀 The rigid frame system, a common choice in Indonesia, consists of columns, beams, and floor plates with a foundation to support the building.
• 😀 The sirwal system is a rare structural choice in Indonesia, sometimes used partially for building stability.
• 😀 Core wall structural systems involve a core in the middle of a building, which can vary in number and placement, used to resist forces.
• 😀 Hybrid systems combine multiple structural systems, including mega columns and diagonal braces, to provide enhanced stability in tall buildings.
• 😀 The hanging or suspension system, although not used in Indonesia due to earthquake risks, relies on steel slings to support floors, but is limited to around 10 floors due to structural constraints.
• 😀 The tube system is similar to a rigid frame system but uses large columns at the edges of the building instead of in the center, designed to handle forces with stronger edge supports.

Q & A

What are the primary types of loads that affect tall buildings?

The primary types of loads affecting tall buildings are vertical loads, horizontal loads, and special loads. Vertical loads include dead load, live load, and snow load. Horizontal loads include wind load, earthquake load, and land shift load. Special loads include impact loads and blast loads.

What is dead load in the context of tall building structures?

Dead load refers to the building's own weight, including the structure itself and permanent components such as walls, floors, and roofs, which exert a downward force on the foundation.

How is live load different from dead load?

Live load refers to loads that can change or be moved, such as people, furniture, cars, and other movable objects. In contrast, dead load is a constant, non-movable weight that the building structure supports.

What is the function of a core wall in tall building structures?

A core wall is a large, vertical element in the middle or sometimes at the edge of a building, designed to resist lateral forces such as wind and earthquakes. It acts like a large column anchored in the foundation to provide stability.

Can you explain the concept of a rigid frame structural system?

A rigid frame structural system consists of columns, beams, and floor plates. It is one of the most commonly used structural systems in Indonesia, providing a stable framework for tall buildings.

What is a hybrid structural system, and how does it work?

A hybrid structural system combines multiple types of structural systems, such as mega columns, mega diagonals, and core walls, to create a more robust and flexible building design that can resist various forces effectively.

Why is the suspension or hanging system not applicable in Indonesia?

The suspension or hanging system is not suitable for Indonesia due to its susceptibility to earthquakes. The hanging system relies on steel slings to support the structure, but it cannot withstand the seismic forces common in Indonesia.

What is the purpose of a podium in tall buildings?

The podium in tall buildings serves to spread the load of the building over a larger area of the ground, providing stability and ensuring a stronger foundation for the entire structure.

How does a tube system in tall buildings differ from a rigid frame system?

In a tube system, columns are placed on the edges of the building rather than in the middle, unlike a rigid frame system where columns are typically placed at regular intervals throughout the building. The columns in the tube system are also larger to support the building's load.

What are the five types of tube structures mentioned in the script?

The five types of tube structures are frame tube structures, inflated tube structures, bundled tube structures, braced tube structures, and outtriggered bridge structures.