Calculate the second column of the lateral stiffness matrix (Ri2, 02 = 1) for the confined masonry cantilever wall shown. The footing, width = 1 m and length = 3 m, rests on a flexible soil with a subgrade coefficient equal to 10,000 ton/ m2 x m. Suppose: Confinement columns: Ec = 2'000,000 ton/m2 thickness = 0.15 m Masonry wall: Ea = 500,000 ton/m2 Ea/Ga = 2.5 thickness 0.15 m Result (ton/m): R12 = -26054 R22 = 36199 R32 = -15332 0.2 2.0 m 0.2 ** rigid shoe 2.5 m 2.5 m 2.5 m

a 300 mm thick footing slab supports a 300 mm thick concrete wall carrying uniform service dead load of 214.31 kN/m and service live load of 145.94 kN/m. the base of the wall footing slab is 1.2 m from the ground surface. design parameters are as follows: ysoil = 16 kN/m^3, yconci = 24 kN/m^3. qa = 215.46 kPa. f'c = 27 MPa and fy = 420 MPa. 1. calculate the required center to center spacing of 16 mm bars for flexure if the maximum factored moment in the slab is 75 kN.m a. 150 mm b. 180 mm c. 210 mm d. NOTA 52. calculate the ultimate beam shear stress on the footing slab if the footing slab is 2.1 m wide. a. 1.25 MPa b. 0.74 MPa c. 0.87 MPa d. 0.96 MPa

a 300 mm thick footing slab supports a 300 mm thick concrete wall carrying uniform service dead load of 214.31 kN/m and service live load of 145.94 kN/m. the base of the wall footing slab is 1.2 m from the ground surface. design parameters are as follows: ysoil = 16 kN/m^3, yconci = 24 kN/m^3. qa = 215.46 kPa. f'c = 27 MPa and fy = 420 MPa. 1. calculate the net allowble bearing capacity of soil in kPa. a. 192.17 b. 189.06 c. 117.32 d. 176.26 2. calculate the minimum required width of the wall footing slab. a. 1.9 m b. 2 m c. 1.8 m d. 1.7 m 3. calculate the maxium ultimate moment (kN.m) in the slab if the width of the footing slab is 2.1 m. a. 82.64 b. 94.63 c. 128.80 d. 111.32

1.) A house is being built on the soil profile shown below bears at the depth shown. The surface loading created by the house is 1500 psf. Draw the o, o', u, profiles with depth and show values at depth shown. In addition, calculate the load on the basement wall with Ko = 0.35. Depth (ft) Sand Ya = 110 pcf Y = 116 pcf 7 ft 10 Clay = 119 pcf 40 Sand = 118 pcf

Figure shows the geometry of a strip footing supporting the load bearing walls of a three storied building and the properties of clay layer. モ G S 1m Y bulk = 18 kN/m³ Strip footing Y GWT + 1.2 m → Clay layer C. = 0.08, e, = 0.40 Y sat = 20 kN/m³ 6 m Hard stratum 6.13 If the pressure acting on the footing is 40 kPa, the consolidation settlement of the footing will be

6. A rectangular 12m x 9m coal pillar is located 100m below surface. Panel road widths are 7m, mining height is 2.5m. Panel encounters a dolerite sill and the load increases by 15%. i. Calculate the load and safety of the pillar. ii. Calculate the thickness of the dolerite sill and new safety factor. iii. Discuss the controllable parameter/s in regards to enhancing the stability of the beam in the roof.

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A 300 mm thick, 2.0 m wide footing slab supports a 200 mm thick concrete wall carrying uniform service dead load of 215 kN/m and service live load of 145 kN/m.  Using f’c = 21 MPa and fy = 420 MPa. use flexure bar = 16mm. 1. calculate the ultimate shear force per 1-m-strip of footing slab at critical section 2. calculate the design shear strength of 1-m strip concrete footing slab 3. calculate the maximum factored wall wall that can be sustained by the footing slab based on shear strength only

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Hi, please calculate and plot the distrbution of passive pressure in front of the wall and active pressure behind the wall  In Soil 1: cohesion, c =0 angle phi = 38 degrees bulk unit weight, Y = 18kN/m3   For Soil 2: cohesion, c =0 angle phi = 28 degrees bulk unit weight, Y(sat) = 20kN/m3