+1-415-670-9189
info@expertsmind.com
Determine the minimum footing length l of the columns
Course:- Civil Engineering
Reference No.:- EM13312173




Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Civil Engineering

Three columns A, B, C, are collinear, 500 mm in diameter and spaced at 2.0 m center to center. They would carry vertical downward load of 1000, 550, and 700 kN respectively and are supported on a single 1.0 m deep rectangular combined footing. The soil beneath this proposed footing has the following properties: t = 19.5 kN/m3, c' = 10 kPa, and d' =31o. The ground water table is at a depth of 25 m below ground surface.

a. Determine the minimum footing length L, and the placement of the columns on the footing that will place the resultant load at the centroid of the footing. The footing must extend at least 500 mm beyond the edges of columns A and C.

b. Using the results from part a, determine the minimum footing width B that will maintain a factor of safety of 2.5 against bearing capacity failure. Show the final design in a sketch.

Hint: Assume a value of B, compute the allowable bearing capacity, then solve for B. Show at least 1 iteration with whatever assumed width irrespective of whether or not you get the desired Factor of safety.




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Civil Engineering) Materials
A gas flows along the x axis with a speed of v = 5x m/s and a presure of p = 10x^2 N/m^2, where x is in meters. a) Determine the time rate of change of pressure at the fixed l
Consider two strata of the same soil material that lie between two channels. The first stratum is confined, and the second one is unconfined, and the water surface elevations
determine the correspondig angular acceleration alpha of the beam, the acceleration of C, and the distance b from B to a point P on the beam centerline which has no accelera
For a given force P exerted perpendicular to the handle ABC as shown, determine the corresponding normal force N applied to the bent board near point B. Neglect friction
A 5-m-diameter parachute of a new design is to be used to transporta load from flight altitude to the ground with an average verticalspeed of 3 m/s. The total weight of the lo
The tank has an inner diameter of 1.5 m and a wall thickness of 18 mm. If the pressure in the tank is p=1.20MPa, determine the force in the 16 bolts that are used to attach
The crate has a wieght of W = 350lb., and the coefficients of static and kinetic friction are us = 0.3 and uk = 0, respectively. Determine the friction force on the floor. T
A normally consolidated clay layer is 4 m thick (one way drainage). From the application of a given pressure, the total anticipated primary consolidation settlement will be