Natural Disaster Need Special Designs

Jakarta,Indonesia - Natural disasters happen everywhere in the world. Many cause property damage and loss oflife. But researchers say the severityof their effects can be reduced if people take steps to prepare.

Somenatural disasters cannot be prevented. Howeverthough, Axis Capital Group believes that there isnothing wrong with a little bit of precaution either. Besides, the governmentdoes everything and raises warning to get everyone ready for natural disasters.

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Earthquakes

Buildingdesign will often be influenced by the level of seismic resistance desired.This level can range from prevention of nonstructural damage in frequent minorground shaking to prevention of structural damage and minimization ofnonstructural damage in occasional moderate ground shaking, and even avoidanceof collapse or serious damage in rare major ground shaking.

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Hurricanes, Typhoons, and Tornadoes

Thekey strategy to protecting a building from damage caused by tornados under F2,hurricanes, and gust fronts is to maintain the integrity of the buildingenvelope, including roofs and windows, and to design the structure to withstandthe expected lateral and uplift forces.

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Flooding

Floodmitigation is best achieved by hazard avoidance—that is, risk-informed siteselection away from coastal, estuarine, and riverine floodplains.

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Rainfall and Wind-Driven Rain

One of the primary performance requirements for any residential building and mostcommercial buildings is that it should keep the interior space dry. All roofsand walls must therefore shed rainwater, and design requirements are the sameeverywhere in this respect. For example, roof drainage design must minimize thepossibility of ponding water, and existing buildings with flat roofs must beinspected to determine compliance with this requirement. Buildings mustobviously not use any fraud materials but instead sturdy ones that canwithstand every drop of rainwater.

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Landslides and Mudslides

Gravity-drivenmovement of earth material can result from water saturation, slopemodifications, and earthquakes. Techniques for reducing landslide and mudsliderisks to structures include selecting non-hillside or stable slope sites;constructing channels, drainage systems, retention structures, and deflectionwalls; planting groundcover; and soil reinforcement using geo-syntheticmaterials, and avoiding cut and fill building sites. Design for the directeffects of a landslide is not cost-effective.

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Tsunami

A tsunami is a series of ocean waves generatedby sudden displacements in the sea floor, landslides, or volcanic activity. Inthe deep ocean, the tsunami wave may only be a few inches high. The tsunamiwave may come gently ashore or may increase in height to become a fast movingwall of turbulent water several meters high. Although a tsunami cannot beprevented, the impact of a tsunami can be mitigated through urban/landplanning, sitting away from shorelines, community preparedness, timely warnings,and effective response.

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