Temperature on Concrete Building 1

[melsawaf]

Dears

Is there any recommendations in ACI telling when to use thermal analysis on concrete building.

 

[wannabeSE]

I am not clear on what you mean by thermal analysis. If you are trying to cope with the heat of hydration, there is ACI 207.1R Guide to Mass Concrete. As a general rule of thumb, heat of hydration may need to be considered in members over 36" thick.

 

[dik]

Is this related to distances between expansion joints and size of expansion joints. Normally only consider thermal effects for unheated or exterior structures. Thermal range in these environs may be from +40C (in the sun) to -40C in the winter, and I don't often go beyond 250' for concrete buildings without a joint or 300' for steel buildings. Also joints at building/finish transitions. I'm pretty conservative about joints...

Dik

 

[melsawaf]

It is related to Expansion Joint location in 2 story admin building and it length about 56 meters.
Shall i make an Exp.J and neglect temperature analysis or 56 is ok without Exp.J

 

[hokie66]

I would only consider an expansion joint in a 56 metre long building if there is irregularity in the plan, e.g. an L shaped building.

 

[wannabeSE]

A common reference is Technical Report 65 Expansion Joints in Buildings. It can be read online or downloaded for free after registering at

https://www.nap.edu/catalog/9801/expansion-joints-in-buildings-technical-report-no-65

 

[dik]

agree with Hokie...

Dik