Earthquake-resistant construction17. July 2019
It is difficult to anticipate when and where a strong earthquake will occur, which is why it is better to take precautions in order to protect yourself. Collapsing houses and structures present the greatest dangers during an earthquake. In addition to various methods, anchors can help buildings withstand the tremors. We spoke to fischer Application Engineer Oliver Ernst about earthquake-resistant construction.
What does earthquake-resistant construction involve?
When speaking of earthquakes and earthquake-resistant construction, we refer to a danger to life and limb on the one hand and safety on the other. Buildings in earthquake areas are divided into categories depending on their significance and the expected seismic load. Schools and hospitals are in a higher category than regular residential buildings, for instance.
Do anchors make all the difference?
Anchors are particularly crucial when it comes to seismic loading, as the anchor connections of building components that frequently bear loads must remain functional under seismic loads. The anchors must first meet several requirements. On the one hand, the fixings must be suitable for cracked concrete, because in case of an earthquake it can be assumed that the anchor is situated in a concrete tension zone where cracks can appear. On the other hand, the anchor’s material properties must make it suitable for earthquakes. Both are regulated by corresponding approval documents. The European Technical Assessment, ETA for short, or the Evaluation Service Report of the ICCES.
Which approved products does fischer have for earthquake areas?
fischer has several products in its range that meet these high seismic requirements. These include the bolt anchor FAZ II and the concrete screw ULTRACUT FBS II among the steel anchors, and the injection system FIS EM Plus and the injection mortar system among the chemical fixings. These products have been approved for anchors subject to seismic loads. The FIXPERIENCE design software and the C-Fix anchor calculation module allows engineers to carry out tensile and shear load anchor calculations, providing them with a verifiable document that can be included in their overall structural analysis.