RC Design Columns

# RC Design Columns - Previously on this topic Load path and...

This preview shows pages 1–2. Sign up to view the full content.

Design of Concrete & Masonry Structures Dr. Barry Y. Bai Lecture #9 (week 6) 27.08.2010 CIV2226 1 Previously on this topic Load path and load calculations Beam design (serviceability and strength) One way spanning slab design (serviceability and strength ) Chapter 5: Columns (strength design) Columns are primarily compression members Columns are also subjected to bending moment Because… horizontal loads, joint moment balance (outside corner column), eccentricity… How to calculate column capacity ??? Section capacity line for a rectangular tied column (strength interaction diagram or failure envelope) Axial compression load (Y axis): N, Moment capacity (X axis): M M=N·e, e: eccentricity Each point in the line represents a combination of bending moment and axial compression load which the column can carry simultaneously. Point A (squash load): Only axial load, no bending. e= ( ) Point B (both N and M): Zero stress in tension bars Point C (balanced failure state): concrete crush ( ε cu ) and steel yield ( ε y )

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern