{"id":4302,"date":"2025-11-28T09:38:33","date_gmt":"2025-11-28T09:38:33","guid":{"rendered":"https:\/\/www.buildsoft.eu\/?p=4302"},"modified":"2025-11-28T09:38:35","modified_gmt":"2025-11-28T09:38:35","slug":"wind-loads-on-buildings-according-to-en-1991-1-4-ro","status":"publish","type":"post","link":"https:\/\/www.buildsoft.eu\/en\/wind-loads-on-buildings-according-to-en-1991-1-4-ro\/","title":{"rendered":"Wind loads on buildings according to EN 1991-1-4 RO"},"content":{"rendered":"\n

Wind loads should be defined using EN 1991-1-4 and the national annex or Romania. Unfortunately, it is not the easiest part of Eurocode to understand. Fortunately<\/em>, Diamonds has a generator with which you can easily determine the wind loads on truss-shaped buildings.<\/p>\n\n\n\n

Let me show you how it works: assume we want to build this hall in Bra\u015fov at an altitude of 800m. We focus on the wind loads on the orange frame in the middle of the structure. The dimensions of that frame are shown on the right.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n\n
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Roof inclination = 10\u00b0<\/em><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

Instructions for geometry & load groups<\/h2>\n\n\n\n

Load groups<\/h3>\n\n\n\n

You can use the frame generator \u00a0\"\" to quickly generate this frame.<\/p>\n\n\n\n

The maximum number of different wind load cases according to Eurocode, is 24. Organize them in sub load cases (read here how to define sub load cases<\/a>). Also make sure to select the Romanian national annex for the partial safety factors and combination coefficients.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Ground level<\/h3>\n\n\n\n

The magnitude of wind loads depends on three things.<\/p>\n\n\n\n

The first thing is the height of the structure above ground level. The higher the structure stands, the more wind loads it will have to bear.<\/p>\n\n\n\n

In Diamonds you can set the ground level by clicking on the button \"\". Leave it on default.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Terrain parameters<\/h3>\n\n\n\n

Second the wind loads depend on the terrain parameters: where will the structure be built?<\/p>\n\n\n\n

Click on \"\" to open the dialog of the terrain parameters. Select the Romanian national annex and set the Terrain type to III.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Next select \u201cvb,0<\/sub>\u00a0 by location<\/em>\u201d and click on \"\". On the map that opens, set the altitude to 800m.\u00a0 Bra\u015fov is zone 3, so select that.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The wind velocity is calculated automatically by Diamonds based on the entered data:<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Hit ‘OK\u2019 to close the Terrain parameters dialog.<\/p>\n\n\n\n

Shape of the building<\/h3>\n\n\n\n

The final step for wind generation with Diamonds, is taken the shape of the structure into account.<\/p>\n\n\n\n