Maximum Seismic Moment Calculator

✖Seismic Coefficient is a measure of the intensity of the seismic shaking that is experienced in an area during an earthquake.ⓘ Seismic Coefficient [C]			+10% -10%
✖Total Weight of Vessel with Attachment widely depends on its size, material, and function.ⓘ Total Weight of Vessel [ΣW]			+10% -10%
✖Total Height of Vessel can vary widely depending on its design and size.ⓘ Total Height of Vessel [H]			+10% -10%

✖Maximum Seismic Moment is the reaction induced in a vessel when an external force or moment is applied to the element causing the element to bend.ⓘ Maximum Seismic Moment [M_s]

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Formula

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Maximum Seismic Moment

Formula

`"M"_{"s"} = ((2/3)*"C"*"ΣW"*"H")`

Example

`"4.7E^7N*mm"=((2/3)*"0.093"*"50000N"*"15m")`

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Download Design of Anchor Bolt & Bolting Chair Formulas PDF

Maximum Seismic Moment Solution

STEP 0: Pre-Calculation Summary

Formula Used

Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel)
M_s = ((2/3)*C*ΣW*H)
This formula uses 4 Variables

Variables Used

Maximum Seismic Moment - (Measured in Newton Meter) - Maximum Seismic Moment is the reaction induced in a vessel when an external force or moment is applied to the element causing the element to bend.
Seismic Coefficient - Seismic Coefficient is a measure of the intensity of the seismic shaking that is experienced in an area during an earthquake.
Total Weight of Vessel - (Measured in Kilonewton) - Total Weight of Vessel with Attachment widely depends on its size, material, and function.
Total Height of Vessel - (Measured in Millimeter) - Total Height of Vessel can vary widely depending on its design and size.

STEP 1: Convert Input(s) to Base Unit

Seismic Coefficient: 0.093 --> No Conversion Required
Total Weight of Vessel: 50000 Newton --> 50 Kilonewton (Check conversion here)
Total Height of Vessel: 15 Meter --> 15000 Millimeter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

M_s = ((2/3)*C*ΣW*H) --> ((2/3)*0.093*50*15000)

Evaluating ... ...

M_s = 46500

STEP 3: Convert Result to Output's Unit

46500 Newton Meter -->46500000 Newton Millimeter (Check conversion here)

FINAL ANSWER

46500000 ≈ 4.7E+7 Newton Millimeter <-- Maximum Seismic Moment

(Calculation completed in 00.004 seconds)

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< 14 Design of Anchor Bolt & Bolting Chair Calculators

Maximum Stress in Horizontal Plate fixed at Edges

Go Maximum Stress in Horizontal Plate fixed at Edges = 0.7*Maximum Pressure on Horizontal Plate*((Length of Horizontal Plate)^(2)/(Thickness of Horizontal Plate)^(2))*((Effective Width of Horizontal Plate)^(4)/((Length of Horizontal Plate)^(4)+(Effective Width of Horizontal Plate))^(4))

Wind Pressure acting on Upper Part of Vessel

Go Wind Pressure acting on Upper Part of Vessel = Wind Load acting on Upper Part of Vessel/(Coefficient depending on Shape Factor*Coefficient Period of One Cycle of Vibration*Height of Upper Part of Vessel*Outside Diameter of Vessel)

Wind Pressure acting on Lower Part of Vessel

Go Wind Pressure acting on Lower Part of Vessel = Wind Load acting on Lower Part of Vessel/(Coefficient depending on Shape Factor*Coefficient Period of One Cycle of Vibration*Height of Lower Part of Vessel*Outside Diameter of Vessel)

Height of Lower Part of Vessel

Go Height of Lower Part of Vessel = Wind Load acting on Lower Part of Vessel/(Coefficient depending on Shape Factor*Coefficient Period of One Cycle of Vibration*Wind Pressure acting on Lower Part of Vessel*Outside Diameter of Vessel)

Height of Upper Part of Vessel

Go Height of Upper Part of Vessel = Wind Load acting on Upper Part of Vessel/(Coefficient depending on Shape Factor*Coefficient Period of One Cycle of Vibration*Wind Pressure acting on Upper Part of Vessel*Outside Diameter of Vessel)

Diameter of Anchor Bolt Circle

Go Diameter of Anchor Bolt Circle = ((4*(Total Wind Force acting on Vessel))*(Height of Vessel above Foundation-Clearance between Vessel Bottom and Foundation))/(Number of Brackets*Maximum Compressive Load on Remote Bracket)

Mean Diameter of Skirt in Vessel

Go Mean Diameter of Skirt = ((4*Maximum Wind Moment)/((pi*(Axial Bending Stress at Base of Vessel)*Thickness of Skirt)))^(0.5)

Maximum Compressive Load

Go Maximum Compressive Load on Remote Bracket = Maximum Pressure on Horizontal Plate*(Length of Horizontal Plate*Effective Width of Horizontal Plate)

Load on Each Bolt

Go Load on Each Bolt = Stress in Bearing Plate and Concrete Foundation*(Area of Contact in Bearing Plate and Foundation/Number of Bolts)

Maximum Seismic Moment

Go Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel)

Stress due to Internal Pressure

Go Stress due to Internal Pressure = (Internal Design Pressure*Vessel Diameter)/(2*Shell Thickness)

Cross Sectional Area of Bolt

Go Cross Sectional Area of Bolt = Load on Each Bolt/Permissible Stress for Bolt Materials

Diameter of Bolt given Cross Sectional Area

Go Diameter of Bolt = (Cross Sectional Area of Bolt*(4/pi))^(0.5)

Number of Bolts

Go Number of Bolts = (pi*Mean Diameter of Skirt)/600

Maximum Seismic Moment Formula

Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel)
M_s = ((2/3)*C*ΣW*H)

What is Design Basis of Vessel?

Design Basis of a Vessel is the set of documents which defines the design, construction, and operation of the vessel. It includes information such as the vessel's intended purpose, design features, materials, safety features, operating environment, system layout, and operating conditions. The Design Basis also outlines the regulatory requirements and industry standards to which the vessel must comply.

How to Calculate Maximum Seismic Moment?

Maximum Seismic Moment calculator uses Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel) to calculate the Maximum Seismic Moment, The Maximum Seismic Moment is the maximum calculated moment of a seismic source, such as an earthquake or a fault. Maximum Seismic Moment is denoted by M_s symbol.

How to calculate Maximum Seismic Moment using this online calculator? To use this online calculator for Maximum Seismic Moment, enter Seismic Coefficient (C), Total Weight of Vessel (ΣW) & Total Height of Vessel (H) and hit the calculate button. Here is how the Maximum Seismic Moment calculation can be explained with given input values -> 4.7E+10 = ((2/3)*0.093*50000*15).

FAQ

What is Maximum Seismic Moment?

The Maximum Seismic Moment is the maximum calculated moment of a seismic source, such as an earthquake or a fault and is represented as M_s = ((2/3)*C*ΣW*H) or Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel). Seismic Coefficient is a measure of the intensity of the seismic shaking that is experienced in an area during an earthquake, Total Weight of Vessel with Attachment widely depends on its size, material, and function & Total Height of Vessel can vary widely depending on its design and size.

How to calculate Maximum Seismic Moment?

The Maximum Seismic Moment is the maximum calculated moment of a seismic source, such as an earthquake or a fault is calculated using Maximum Seismic Moment = ((2/3)*Seismic Coefficient*Total Weight of Vessel*Total Height of Vessel). To calculate Maximum Seismic Moment, you need Seismic Coefficient (C), Total Weight of Vessel (ΣW) & Total Height of Vessel (H). With our tool, you need to enter the respective value for Seismic Coefficient, Total Weight of Vessel & Total Height of Vessel and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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