Rcc Roofs After Earthquakes

Ii just after a damaging earthquake temporary supports and emergency repairs are to be carried so that pre cariously standing buildings may not collapse during aftershocks and the less damaged ones could be.

Rcc roofs after earthquakes.

In this article we are going to learn about some of the widely used chemical treatments that are quite popular in rcc roof waterproofing work. First if the soft first story concept is used large permanent displacements are likely during major earthquakes. Minor damage for walls constructed with cement mortar and significant damage for walls constructed with mud mortar were observed after bhuj. Particularly the roof and upper stories of building should be designed as light as possible.

Wooden buildings during earthquakes. If the height is more it should be reinforced with steel rods and should be fixed with roof slab or bottom wall. However during the 2001 earthquake bhonga constructions performed at least as well as modern masonry constructions with cement mortar and rcc roof. Masonry buildings with light roofs such as tiled roofs are more vulnerable to out of plane vibrations since the top edge can undergo large deformations.

The structure should be made as light as possible because the force of earth quake is a function of the mass. Additional comments on earthquake damage patterns. Rcc roof waterproofing is an important process used to make it more adequate to endure rainwater or any other form of water pour without crossing into its composition. Allowing the water to run off your roof and onto your neighbour s land is considered very bad form so the roof may be cut back a few cms from the property line and a concrete gutter cast along the top of the wall to collect the water and carry it away.

It is always useful to investigate the behavior of masonry buildings after an earthquake so as to identify any inadequacies in earthquake resistant design. Let s see what are they in details. Same as roof 3 but the airflow through the hollow passage is permitted by opening the ends to the ambient. Second when flexural hinging is anticipated in columns or beams closely spaced and properly sized transverse reinforcement ties stirrups spirals.

This is also most common type of construction in areas of high seismicity. Down a roof and cause more damage. On the 25 th of april 2015 a 7 8 m w earthquake hit the central northern part of nepal. A 150 mm thick rcc roof covered with 75 mm thick hollow clay tiles hollow passages 50 mm 50 mm are blocked at the ends and no air flow is permitted.

To make the most of land area buildings may be built right up to the boundary of a property. Earthquake the required strengthen ing of seismically weak buildings is to be determined by a survey and analysis of the structures.