{"id":13162,"date":"2024-08-01T14:41:37","date_gmt":"2024-08-01T14:41:37","guid":{"rendered":"https:\/\/support.buildsoft.eu\/?post_type=ht_kb&p=13162"},"modified":"2025-04-16T14:35:59","modified_gmt":"2025-04-16T14:35:59","slug":"dc-ec-06-2nd-order-effect-in-a-column","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/nl\/knowledge-base\/dc-ec-06-2nd-order-effect-in-a-column\/","title":{"rendered":"DC EC 06: 2nd order effect in a column"},"content":{"rendered":"

Description<\/h2>\n

\"\"<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Geometry<\/th>\nCross-section:<\/td>\n\"b=250mm\"
\n\"h=400mm\"<\/td>\n<\/tr>\n
Column height:
\nBuckling length:<\/td>\n		\"2m\"
\n\"4m\"<\/td>\n<\/tr>\n
Material:<\/td>\nC25\/30<\/td>\n<\/tr>\n
Concrete cover:<\/td>\n\"c=40mm\"<\/td>\n<\/tr>\n
Creep factor \"\varphi _{t.\infty}\":<\/td>\n2<\/td>\n<\/tr>\n
Reinforcement distribution:<\/td>\nIdentical
\nOnly upper and lower<\/td>\n<\/tr>\n
Load<\/th>\nDesign forces:<\/td>\n\"N_{Ed.ULS}=300kN\"
\n\"M_{Ed.ULS}=120kNm\"
\n\"M_{Ed.SLS QP}=88.9kNm\"<\/td>\n<\/tr>\n
Standard<\/th>\n<\/td>\nEN 1992-1-1 [- -]<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
<\/span>How to model a column in Diamonds that can be compared with handcalculations<\/div>
\n

Diamonds looks for the most economical reinforcement ratio between Az and Ay by default. This is does not always results in a calculation along the local y’- axis or one along the local z’-axis. When loads (and\/or eccentricities) are present along the y’- and z’ axis, the calculation is done around the resulting axes of the loads\/eccentricities. Because this calculation is no longer in one specific plane, it becames hard to recalculate by hand. In this example, we’ll do some adjustments to the model, so that the calculation is in one particular plane parallel to one the local axes and can be reproduced by hand calculations.<\/p>\n