On June 13, 2023, Kishtwar, Jammu & Kashmir (J&K), experienced an earthquake with a Richter scale value of 5.4. The earthquake had a 6km depth and happened at 1:33 in the afternoon. In Doda, there was an epicentre. Delhi and other areas of north India experienced earthquake tremors.
How can you be sure that your house is earthquake-proof.pdf
1. How Can You Be Sure That Your House Is
Earthquake-Proof?
We look at India's seismic zones and the building codes that a homeowner might use
to determine whether his property is earthquake-proof.
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5.4 magnitude earthquake in J&K
On June 13, 2023, Kishtwar, Jammu & Kashmir (J&K), experienced an earthquake
with a Richter scale value of 5.4. The earthquake had a 6km depth and happened at
1:33 in the afternoon. In Doda, there was an epicentre. Delhi and other areas of
north India experienced earthquake tremors.
Recent Earthquakes
On March 21, 23 there are tremors in Delhi when an earthquake strikes the Hindu
Kush region of Afghanistan.
On March 21, 2023, at approximately 10.17 p.m., a powerful earthquake struck the
Hindu Kush region of Afghanistan. Strong earthquake sensations lasting about 30
seconds were reported in Delhi and other North Indian states. In India, no one's
property or person was lost. The 6.6 on the Richter Scale earthquake's epicentre
was close to Jurm, Afghanistan. Due to the 156 km depth, the tremors could be felt in
2. India as well as nearby nations like Pakistan, China, Tajikistan, Kyrgyzstan, and
Uzbekistan.
Turkey is devastated by an earthquake on February 27, 2023.
On February 27, 2023, a 5.6-magnitude earthquake struck Turkey, forcing
numerous buildings to collapse. Three weeks have passed since the terrible
earthquake that claimed hundreds of lives.
The J&K earthquake occurs on February 17, 2023.
The National Centre for Seismology of India reported a magnitude 3.6 earthquake in
Katra, Jammu & Kashmir on February 17, 2023 at 5:01 am, at a depth of 10 km.
However, there was no mention of any property damage.
On February 6, 2023, an earthquake occurs in Turkey.
One glance at the globe reveals the world's deadliest earthquake, which struck
Turkey on February 6, 2023, measuring 7.8 on the Richter Scale and was followed
by another earthquake measuring 7.7 approximately nine hours later. Following the
earthquake, there were around 2,100 aftershocks, and over 43,000 fatalities were
recorded.
On February 6, 2023, an earthquake strikes Delhi.
The National Centre for Seismology (NCS) tweeted that a 5.8-magnitude earthquake
struck Nepal at 2:28 PM on January 24, 2023. Strong earthquake tremors were felt
in Delhi and the nearby areas.
Recent earthquakes have been felt, among other places, in areas of Rajkot, Gujarat,
and even the National Capital Region (NCR) of Delhi. Higher magnitude earthquakes
can result in significant loss of life and property, which makes the structural
integrity of structures and the requirement for the greatest seismographs essential.
According to a 2016 report titled "Earthquake Hazard Zoning Maps" by the Building
Materials Technology Promotion Council (BMTPC), up to 95% of homes nationwide
are vulnerable to earthquakes." The BMPTC is an organisation supported by the
government that promotes proper building technology. Let's learn about India's
seismic zones and how to construct houses that can withstand earthquakes.
3. The earthquake zones in India
In India, 59 percent of the country's territory is vulnerable to earthquake damage.
There are four distinct zones on this property.
Zone V
Zone V, the seismically most active zone, includes portions of the Himalayan barrier
in north and north-east India, parts of Jammu and Kashmir, the Kutch region in west
India, Himachal Pradesh, north Bihar, the Andaman and Nicobar Islands, and
Uttaranchal. Earthquakes have the potential to cause significant damage in this area.
Zone IV
Zone IV includes some of Jammu & Kashmir, Himachal Pradesh, the National Capital
Region of Delhi, Sikkim, northern Uttar Pradesh, West Bengal, Bihar, some of
Maharashtra (close to the west coast), Gujarat, and Rajasthan. Zone IV is a less active
zone than Zone V, although it can still cause a lot of damage.
Zone III
Zone III includes the remaining areas of Uttar Pradesh, West Bengal, Rajasthan,
Bihar, Jharkhand, Chhattisgarh, and Maharashtra that are not in Zones IV or V and is,
on balance, safer than those two zones. Madhya Pradesh, Odisha, Andhra
Pradesh, Kerala, Tamil Nadu, Goa, Lakshadweep, and Karnataka are also included in
this.
Zone II
This region, which includes areas of India that are not included in any of the
aforementioned zones, is the safest or, more precisely, the least active.
4. Earthquake-resistant home
The Bureau of Indian Standards & building standards provide rules for the
construction of earthquake-resistant homes and structurally sound buildings. The
necessary internal components for an earthquake-resistant structure are depicted
in the following diagram.
Best materials to use when constructing a house that is earthquake resistant
Construction materials that are resistant to earthquakes include wood, concrete,
and wood. To make concrete-based homes with steel slabs earthquake-resistant,
additional support must be provided.
How to evaluate the safety of residential brick buildings in Delhi using an
earthquake proof house?
Given that Zone IV includes earthquake-prone and damage-prone locations, the NCT
of Delhi is one of them. A maximum earthquake strength of VIII on the MSK strength
Scale is probable in places like these. Kutcha constructions and masonry buildings
could sustain damage as a result of this. According to the National Institute of
Disaster Management, structures built in sandy soil with a high-water table run the
risk of suffering greater damage than those built with high-quality cement mortar.
Here's how to determine whether your home is earthquake-resistant or how much
damage it might sustain.
Number of storeys
In general, one- or two-story structures with walls that are one brick thick (nine
inches) or less are safer than three-story structures. If a fourth floor is erected, it
will be extremely dangerous and make living in the lower storeys more dangerous.
Each storey's load-bearing walls' thickness
Half-brick load bearing walls that are 412 inches thick can render a building
dangerous, and if they are employed in higher levels, they may even have disastrous
effects. Walls that have too many window apertures deteriorate in strength. The risk
of destruction will also increase if there are small piers used in the gaps between
5. apertures that are smaller than 45 cm. The optimal apertures' total width should be
as follows:
Building type Combined width of openings (for
windows)
1-storeyed building Not more than 50%
2-storeyed building Less than 42%
3-4-storeyed building Less than one-third of the length of the
wall
Mortar used for construction
The building will be more secure if the mortar is stronger the ratio of mortar that is
advised for use in order to preserve safety is one-part cement to every six parts
sand. The NIDM claims that lime-surkhi or lime-cinder mortar is substantially
weaker.
Horizontal seismic bands
The horizontal bands that are given at the plinth level & lintel level of doors,
windows, and exterior and internal walls are crucial seismic safety components.
These make the walls more resistant to seismic damage and provide the house an
earthquake-proof structure.
Vertical bar reinforcement
Vertical reinforcing bars should be installed from the foundation to the top roof slab
at every corner & T-junction of the room.
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