Impact of Box Column Section Dimensions on Overall Structure

Box column section dimensions directly affect structural stability. Increasing the section can reduce the slenderness ratio, meeting seismic code limits (e.g., Level 1 ≤ 60√(235/fy)), but local stability must be checked simultaneously to prevent plate buckling.

Section optimization needs to balance bending and torsional requirements. For example, a □600×600×20 section has 5-8 times the torsional stiffness of an H-shaped column, making it suitable for bidirectional force scenarios, but internal diaphragms (spacing ≤ 2m) are required.

Design must consider the load type. Heavy-load buildings (such as metallurgical workshops) require larger sections to withstand 200-ton crane loads, and welding quality requires 100% flaw detection to prevent stress concentration cracking.