The dynamic magnification of response compared

Assignment Help Civil Engineering
Reference no: EM13542335

A floor slab has a fundamental bending frequency of 10Hz. A shaker is placed at the centre of the slab for a dynamic testing. The tests confirm that the slab displays a damping ratio of 2% of critical.

Detennine (1) the required shaker frequency to cause "resonance" and (2) the dynamic magnification of response compared with static response for that level of damping.

Reference no: EM13542335

Questions Cloud

Determine the actual distance below the surface : In the determination of the average velocity of flow in wide rivers, it is common practice to estimate the average velocity in a vertical section by making a single measurement at a distance below
Locate the well screen in the middle of the aquifer : A well installed into a confined aquifer with a porosity of 0.3 and saturated thickness of 80 ft. The gravel pack requires a well screen slot width of 0.025 inches. The hydraulic conductivity of the aquifer is 60 ft/d. The radius of influence is 1200..
Find the conveyance of flow : A flow of 0.1 cum/s flows down in a rectangular channel of width of 0.6m and having and adjustable bottom slope. If chezys constant C is 56, determine the bottom slope necessary for uniform flow with a depth of flow 0.3m. Also find the conveyance of ..
Determine the increase in vertical stress at a depth of : A gunite concrete trapezoidal channel (n = 0.019) with 1:2 side slopes, as ilustrated below, conveys 60 m3/s on a slope of 0.0005. Compute the depth of flow.
The dynamic magnification of response compared : Detennine (1) the required shaker frequency to cause "resonance" and (2) the dynamic magnification ofresponse compared with static response for that level of damping.
Determine the deflection at the mid span of a simple : Determine the deflection at the mid span of a simple beam (wood joist) of a row house. The joist is designed as 2x12@16'' for DL = 12psf and LL=40 psf.
What is the critical state angle of friction of the soil : On a plane within a saturated soil mass, the total normal stress is 185 kPa, the pore-water pressure is 98 kPa and the shear stress is 42 kPa. The soil undergoes shear failure and reaches critical state on this plane
Find the depth and the rate of flow in si units for critical : Water flows down a wide and shallow rectangular channel of concrete (n=0.015) laid on a slope of 0.004. find the depth and the rate of flow in SI units for critical conditons in the channel.
Calculate the total vertical stress pore water pressure : An investigation at a particular site reveald 10 m of clay overlying 2m of sand resting on bedrock.the water table was found to be at the ground surface and the piezometric level for the sand to be 2m above ground level

Reviews

Write a Review

Civil Engineering Questions & Answers

  Determine what is cb for each span to some uniform load

For a three span continuous beam ( three 20' spans ), subjected to some uniform load, what is Cb for each span. Assumed the beam is braced against translation and rotation at each support.

  What must be the radius of the steel wire

What must be the radius of the steel wire if it is to stretch the same distance as the aluminium wire, so that the two wires maintain equal lengths after the masses are attached?

  Find volume of the aeration basin in gallons to meet ratio

A wastewater treatment plant has a flow of 30 mgd. The influent BOD is 250 mg/L. Assume that 30% of the BOD is removed in the primary clarifiers. The plant is designed to carry 3,000 mg/L of VSS in the aeration basin.

  Determining stress fort rigid bar of negligible weight

The rigid bar of negligible weight is supported as shown. Find the stress in each rod if the temperature rises DeltaT after a load P is applied. Use the following data: area of steal rod 320mm2, bronze rod 1300mm2, thermal expansion coefficient Al..

  Determine the required mass of c and the length of the cable

if D has a mass of 600 kg, determine the required mass of C, the maximum sag h of the cable, and the length of the cable between the pulleys A and B. The Beam has a mass per unit length of 50 kg/m.

  Determine the mass distribution

If metal sorption to algae can be modeled by a Langmuir isotherm, determine the mass distribution (sorbed vs dissolved) of lead in the marsh.

  What is the specific discharge in this rectangular channel

A large concrete channel holds a hydraulic jump in which the subcritical depth of flow is 2.5 m.  If 40 percent of the specific energy in the flow is lost through the hydraulic jump, what is the specific discharge in this rectangular channel?

  Calculate the angles made by f with the positive x

A force is specified by the vector F= 120i-160j+80k lb. Calculate the angles made by F with the positive x-,y-, and z- axes.

  A pre-engineering base line was run down a very steep

a pre-engineering base line was run down a very steep hill.rather than measure horizontaily down hill with steel tape

  Suggest an alternative engineering design solution that

Stormwater controls are typically designed by civil engineers. Stormwater is collected in pipes below the ground and routed to nearby surface water

  How much horizontal distance is there from prism to point a

using a prism and prism pole in conjunction with a total station, the bottom of the prism pole is placed on point A. the distance from the bottom of the prism pole to the center of the prism (HR) is 4.97 feet.

  Calculate the height of the model on the crest

The spillway section is 40 feet high, its crest length is 60 feet and the maximum discharge is 3,000 CFS when the head on the crest of the spillway is 5 feet. Using a model scale of 1:10, calculate the height of the model.

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