3.3.7 Effect of temperature

3.3.7 Effect of temperature

Struts will expand or contract according toΔL＝αΔtL where

L＝strut length；

Δt＝change in strut temperature；

A＝thermal coefficient of expansion，1.2×10－5／℃for steel.

If fully restrained（i.e.ΔL＝0）

The actualΔPfield measured in the field are much less thanΔPtemp because of wall yielding.

A temperature change of±10℃is expected.k＝1.0 is for a fully restrained strut where both ends are prevented to expand freely.In the absence of rigorous analysis，k＝0.6 is recommended for flexible sheet pile walls and k＝0.8 for stiff wall with stiff soil condition.Temperature effects are normally added to the predicted strut loads after the analysis is completed.