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Structural Engineering

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Asked: July 27, 2020In: Structural Engineering

What are the reasons of Building Collapse?

Preet Chovatiya
Preet Chovatiya

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What are the reasons of Building Collapse?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    Added an answer on November 20, 2020 at 3:53 pm
    This answer was edited.

    I will provide you a list which causes the building to collapse. Defective building design Faulty construction & More extra loads Failure of foundation Unexpected failure mode Soil liquefaction Demolition through explosives Earthquake Tsunami Typhoon and winds with high speed. Landslides or settRead more

    I will provide you a list which causes the building to collapse.

    1. Defective building design
    2. Faulty construction & More extra loads
    3. Failure of foundation
    4. Unexpected failure mode
    5. Soil liquefaction
    6. Demolition through explosives
    7. Earthquake
    8. Tsunami
    9. Typhoon and winds with high speed.
    10. Landslides or settlement of Sub-base soil due to over drainage.
    11. Soil with less bearing capacity.
    12. Errors in structural design.
    13. Inferior quality of cement and integrants is used.
    14. Use after the expiry of the life of buildings.
    15. Maintenance not done properly.
    16. Proper Foundation not provided.
    17. Less amount of reinforcement provided.
    18. Reinforcement corroded.

      Thank You.

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Asked: July 16, 2020In: Structural Engineering

What is diffrence between retaining wall and breast wall?

Vivek Patel
Vivek Patel

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What is diffrence between retaining wall and breast wall?

  1. vivek gami

    vivek gami

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    Added an answer on July 19, 2020 at 9:34 pm

    Basic difference is retaining wall is designed to resist backfill earth pressure and breast wall is resist for natural earthen slope of hilly area In hill. When road is construct, at that time we need to cut-off some portion of hill and basically we construct two wall one is breast wall which is onRead more

    Basic difference is retaining wall is designed to resist backfill earth pressure and breast wall is resist for natural earthen slope of hilly area

    In hill. When road is construct, at that time we need to cut-off some portion of hill and basically we construct two wall one is breast wall which is on hill side of the road to give stability of hill slop and another one is retaining wall which is construct on valley side of road which wall have backfill pressure plus road pressure on backfill so we need to design retaining wall for that backfill & surcharge .

    See figure for different between retaining wall and breast wall.

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Asked: August 15, 2020In: Structural Engineering

What is the maximum width of stair case for public buildings?

AdityaBhandakkar
AdityaBhandakkar

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What is the maximum width of stair case for public buildings?

  1. nikeetasharma

    nikeetasharma

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    Added an answer on November 26, 2020 at 12:56 pm

    For reduced use staircases such as accesses to lofts, attics and terraces, the minimum width shall be 600mm. The minimum tread shall be 250mm excluding nosing and the maximum riser will be 175mm for all buildings except for internal staircases of apartments, which can be permitted upto 190mm.

    For reduced use staircases such as accesses to lofts, attics and terraces, the minimum width shall be 600mm. The minimum tread shall be 250mm excluding nosing and the maximum riser will be 175mm for all buildings except for internal staircases of apartments, which can be permitted upto 190mm.

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Asked: April 27, 2019In: Structural Engineering

How to Calculate Reinforcement Steel Overlap Length?

onejohi
onejohi

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How to calculate length of overlap for reinforcement steel?

  1. Gopal Mishra

    Gopal Mishra

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    Gopal Mishra
    Added an answer on April 27, 2019 at 6:50 pm

    Lapping of reinforcement is usually done where minimum bending stress is required. In general, lap length is 50d which means 50 times the bar diameter is provided if both bars are of same diameter. Lap length in tension: The lap length including anchorage value of hooks shall be For flexural tensionRead more

    Lapping of reinforcement is usually done where minimum bending stress is required. In general, lap length is 50d which means 50 times the bar diameter is provided if both bars are of same diameter.

    Lap length in tension:
    The lap length including anchorage value of hooks shall be

    For flexural tension – Ld or 30d whichever is greater is considered.
    For direct tension – 2Ld or 30d whichever is greater is considered.
    The straight length of lapping of bars shall not be less than 15d or 20cm.

    Lap Length in Compression:
    The lap length is equal to the development length calculated in compression but not less than 24d.

    For Different Diameter Bars:
    When the bars of different diameters are to be spliced, the lap length is calculated considering the smaller diameter bar.

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Asked: July 22, 2020In: Structural Engineering

What is the diffrence between lap length and development length?

Vivek Patel
Vivek Patel

Vivek Patel

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What is the diffrence between lap length and development length?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    Added an answer on September 30, 2020 at 5:44 pm

    lap length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended. lap length is to be provided to safely transfer the load. Development length is provided to transfer the load from steel to concrete. It is also known as anchorage lengRead more

    lap length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended. lap length is to be provided to safely transfer the load.

    Development length is provided to transfer the load from steel to concrete. It is also known as anchorage length.

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Asked: July 19, 2020In: Structural Engineering

What is murrum soil?

Vivek Patel
Vivek Patel

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What is murrum soil ? Is it rock ? What is its density approximately?

  1. nikeetasharma

    nikeetasharma

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    Added an answer on September 13, 2020 at 9:23 pm

    Murrum soil is the soil of humid tropical or equatorial zones. It is characterised by the deep weathered layer fom which silica has been leached. Thus, there is no humus, but an accumulation of aluminium and iron oxides and hydroxides. These soils are reddish in color & is imparted by the iron cRead more

    Murrum soil is the soil of humid tropical or equatorial zones. It is characterised by the deep weathered layer fom which silica has been leached. Thus, there is no humus, but an accumulation of aluminium and iron oxides and hydroxides. These soils are reddish in color & is imparted by the iron compounds. For building huts and paths, they are good materials, as it can be compacted easily to form hard surfaces.

    Murrum soil comes under laterite soil. Laterite is a soil and a rock type rich in iron and aluminium. Murrum soil is also referred as being a rock type but it is not a rock.

    The approximate density of murrum soil is 1.8 gm/cc.

     

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Asked: July 19, 2020In: Structural Engineering

What are the benefits of T-beam in building compare to the ordinary beam?

Vivek Patel
Vivek Patel

Vivek Patel

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What are the benefits of T-beam in building compare to the ordinary beam?

  1. Preet Chovatiya

    Preet Chovatiya

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    Added an answer on July 24, 2020 at 5:45 pm

    T-beam is simply rectangular beam cast monolithically with the slab. Advantage os T-beam over ordinary beam:- T-beam casting with slab as we know so Its flange takes compressive stress and that mean It will resist more sagging moment of beam. Depth of beam is reduced as compare to ordinary beam so bRead more

    T-beam is simply rectangular beam cast monolithically with the slab.

    Advantage os T-beam over ordinary beam:-

    1. T-beam casting with slab as we know so Its flange takes compressive stress and that mean It will resist more sagging moment of beam.
    2. Depth of beam is reduced as compare to ordinary beam so better headroom advantage.
    3. Over longer span T-beam is used rather than ordinary beam for reducing the deflection of beam.

     

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Asked: September 25, 2020In: Structural Engineering

How do you calculate twisting moment?

nikeetasharma
nikeetasharma

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how to calculate twisting moment?

  1. nikeetasharma

    nikeetasharma

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    Added an answer on October 15, 2020 at 10:10 am

    Torsion is the twisting of a beam under the action of a torque (twisting moment). It is systematically applied to screws, nuts, axles, drive shafts etc, and is also generated more randomly under service conditions in car bodies, boat hulls, aircraft fuselages, bridges, springs and many other structuRead more

    Torsion is the twisting of a beam under the action of a torque (twisting moment). It is systematically applied to screws, nuts, axles, drive shafts etc, and is also generated more randomly under service conditions in car bodies, boat hulls, aircraft fuselages, bridges, springs and many other structures and components. A torque, T , has the same units (N m) as a bending moment, M . Both are the product of a force and a distance. In the case of a torque, the force is tangential and the distance is the radial distance between this tangent and the axis of rotation.

    All torsion problems can be solved using the following formula:

    T/J = shear stress/ r = (G * angle)/ L

    where:

    T = torque or twisting moment, [N×m, lb×in]
    J = polar moment of inertia or polar second moment of area about shaft axis, [m4, in4]
    τ = shear stress at outer fibre, [Pa, psi]
    r = radius of the shaft, [m, in]
    G = modulus of rigidity (PanGlobal and Reed’s) or shear modulus (everybody else), [Pa, psi]
    θ = angle of twist, [rad]
    L = length of the shaft, [m, in]

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