Question

When wind (or an earthquake) creates a live, torsional impact load on the wall. columns will want to twist. The ________ bracing (called a moment frame) is designed to limit the twisting of columns.

a) X
b) Y
c) Z
d) A

Answer 1

X bracing, also known as moment frame, is used to limit the twisting of columns when subjected to torsional loads such as wind or earthquakes. This type of bracing redistributes forces to the structure's foundation and, alongside other technologies like tuned-mass dampers, ensures the stability and safety of tall buildings.

Step-by-step explanation:

The correct answer to the question of what type of bracing is designed to limit the twisting of columns is a) X bracing (also called a moment frame). This type of structural design element within buildings is crucial for maintaining the integrity of a structure when subjected to dynamic loads such as wind or seismic forces. The efficiency of the X bracing, or moment frame, lies in its ability to provide resistance to lateral forces, helping to ensure that buildings remain safe and stable.

X bracing systems work by transferring the loads through diagonal bracing. These forces are redistributed to the foundation of the structure, helping to prevent excessive movements that could lead to damage or collapse. When considering structural design, engineers also utilize other technologies like tuned-mass dampers to further mitigate oscillations in tall buildings, enhancing their resilience against dynamic forces.