Stress design method, Civil Engineering

Assignment Help:

You have been selected to assist the structural engineer for a bridge replacement project.  Your task is to design the size of the footing for an interior bridge pier, based on the allowable stress design method. A soil test boring was drilled at the location of the bridge pier.  The soil test boring log has shown that the soil is fairly uniform at the pier location and consists of a layer of clay overlying a three-layer system of silty sand, well graded sand, and uniform sand. Detailed information about each layer is given in Fig.  Groundwater table was encountered at the depth of 9.1 meters during subsurface exploration, but seasonal changes may raise the water table to a depth of 7.5 meters below ground surface.

The following information was provided by the structural engineer:

  • Scour is not an issue at the site. 
  • Frost penetration depth is 1.0 m. 
  • Tolerable settlement for the project is 38 mm.
  • Factored Axial Load = 8500 kN
  • Factored Shear Load = 225 kN
  • Factored Moment in Z-direction = 600 kN-m
  • Factored Moment in Y-direction = 950 kN-m
  • Use Schmertmann's (1975) and Kulhawy and Mayne (1990) correlation between SPT and φ', and round to nearest degree. 
  • The increase in stress in each layer may be estimated using the 2:1 method
  • Settlement analysis should be based on the Hough Method 

 

Using the information provided above, design the size of the footing for the interior bridge pier, based on the allowable stress design method.  You should consider both settlement and bearing capacity, and check for overturning and sliding. You should provide the structural engineer with a formal typed report that will include all of your analyses and final size of the footing. You should also include all of your design assumptions in your report.

2208_surface.png


Related Discussions:- Stress design method

What is the main reason being for the phenomenon, Sometimes side of concret...

Sometimes side of concrete bridges is observed to turn black in colour . What is the main reason being for the phenomenon ?

Disparity between working stress and limit state approach, Question Wha...

Question What is key disparity between working stress approach and limit state approach ? Answer Working stress approach, service loads are used in whole plan and st

Tack rivet, tack rivet figures with connections

tack rivet figures with connections

Explain about best hydraulic section, Q. Explain about Best hydraulic secti...

Q. Explain about Best hydraulic section? The best hydraulic section of an open channel is considered by provision of maximum discharge with a given cross sectional area. Chann

Raised check rails for obtuse crossing, Raised Check Rails for obtuse cross...

Raised Check Rails for obtuse crossing In order to provide guided path way in throat portion of 1 in 8 1/2 BG obtuse diamond crossing, the check rails are raised by welding of

Of obstacles to both chaining and ranging.., #questof obstacles to both cha...

#questof obstacles to both chaining and ranging. ion..

Execution compression test for concrete, Question In execution compression...

Question In execution compression test for concrete , have to test cubes .Test cylinders be approved? Answer Essentially, results of compression test carried out by using cu

Corrosion, How is corrosion perverted...?

How is corrosion perverted...?

Categories of losses of prestress, Categories of losses of prestress We...

Categories of losses of prestress We may put various losses in either of two categories : Losses which take place during transfer of  prestress and those which take place after

Designing of service reservoirs, Question In designing of service res...

Question In designing of service reservoirs , straight reinforcement in walls of reservoirs is placed at external layer. Give some specific and main reasons?   Answer

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