Seismic loads for structure-mounted equipment, Mechanical Engineering

Assignment Help:

Q. Seismic Loads For Structure-Mounted Equipment?

For equipment mounted in a structure above grade, the governing equation for seismic force is:

Fp = AvCcPacWc, where Av = (a site-specific value, equipment seismic coefficient Cc=5), and performance criteria factor P=1.0.ac=1.0, except for flexible equipment such as tall slender vessels, vessels on tall legs springs, or other resilient supports.  This factor is then given as follows: for Tc/T<0.6 or Tc/T>1.4, ac=1.0; for Tc/T³0.6 or Tc/T£1.4, ac=5.0. 

Tc is the first natural period of the equipment, and T is the first natural period of the structure.  Wc is the operating weight of the equipment.  Fp is the horizontal seismic force, applied at the center of gravity of the equipment and in the direction causing the highest stresses. The design of pressure retaining elements (both internal and external) shall permit allowable stress multiplying factors.


Related Discussions:- Seismic loads for structure-mounted equipment

Describe organic binders and its working, Q. Describe Organic binders and i...

Q. Describe Organic binders and its working? Organic binders: The binders are most frequently used in core making. Cereal binders are obtained from wheat, corn or rye; resins

Total tension in cable of the elevator, Total tension in cable of the eleva...

Total tension in cable of the elevator: An elevator having weight 5000N is ascending with an acceleration of 3m/sec 2 . During this ascent its operator which is having weig

Calculate the thermal efficiency of the cycle, An engine uses air as the op...

An engine uses air as the operating substance. At the beginning of compression the pressure is 90 KN /m 2 and the temp. is 40 0 C. During the adiabatic compression, the volume is

What is manifolds, Manifolds The surface of a solid must satisfy some c...

Manifolds The surface of a solid must satisfy some conditions so that the resulting solid is well-behaved. This is the so-called manifold condition. While recent research has s

Impact testing, Charpy impact tests, when required shall comply. Impact ...

Charpy impact tests, when required shall comply. Impact tests shall be conducted at the minimum design metal temperature or at a lower temperature and shall meet or exceed energ

Calculate values of the yield strength, Your company received an order to m...

Your company received an order to machine a batch of 150 steel parts that are 73.0 mm in diameter and 250 mm in length. One of the processes is a finish turning operation. Where th

Explain double bolting, Q. Explain Double Bolting? Where low strength b...

Q. Explain Double Bolting? Where low strength bolts must be used, initial bolting with higher strength low temperature bolts may be necessary to minimize accumulative strain an

Explosive welding i cladding, EXPLOSIVE WELDING I CLADDING In this pr...

EXPLOSIVE WELDING I CLADDING In this process, two pieces of metal are impacted together at an extremely high velocity of impact achieved by the detonation of an explosive cha

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd