Earthquake residential design in Nepal

भिडियो हेर्न तलको बक्स भित्र क्लिक गर्नुहोस

During an earthquake, a wave propagates from the rock to the soil and then into the structure, creating a sway in the structure. The key to designing an earthquake-resistant structure is to build a ductile structure rather than a stiff structure.

The extent of damage to a structure during an earthquake depends upon the distance of the epicentre from the structure horizontally as well as vertically below the ground. If the epicentre is closer to the surface, the damage tends to be larger in structures that are not resistant to earthquakes. It also depends on the type of soil. During earthquakes, certain soil such as sandy soil or deposited layers undergo soil liquefaction, causing greater damage to structures. Soil liquefaction is essentially when the soil bubbles, heaves or surges to the top surface under great pressure. Some areas in Delhi are prone to the occurrence of soil liquefaction during an earthquake, specifically those areas which have higher deposits of sandy silt or clayey soils.Generally during an earthquake, load bearing structures have brittle failure while well-designed reinforced cement concrete (RCC) structures have ductile failure. Earthquake-resistant design is essentially about ensuring that the damage to buildings during earthquakes is of an acceptable variety, with zero human loss and also that they occur at the right places and within acceptable ranges. All legally built structures are either load bearing or RCC structures. In load bearing structures, the brick walls are thick (between 9 inches to 1 foot) and carry the load to the foundation. It may have beams and the slab is typically made of concrete with steel reinforcement. RCC structures, referred to as framed structures, are made of concrete and steel and the load is carried by columns or shear walls to the foundation resting on concrete piles.

भिडियो हेर्न तलको बक्स भित्र क्लिक गर्नुहोस

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