Handbook of Civil Engineering Calculations

FIGURE 44 Take moments with respect to each support to find the reactions Span AB: SM 4 - 6(5) + 2(10)(5) + 80.2 - KXR 51 = O; ...

a. Remove the span AB, and introduce the shear VB and moment M 5 that the load on AB induces at J5, as shown in Fig. 44Z). b. Re ...

FIGURE 45. Moment distribution. Calculate the unbalanced moments Computing the unbalanced moments at B and C yields the followi ...

Perform the second cycle of moment balancing and distribution Thus MBA = -9.9(15/31) = -4.8; MBC = -9.9(16/31) - -5.1; MCB = +1 ...

TABLE 5 Forces in Truss Members (Fig. 46) A, in^2 L, in U, kips S', kips Member (cm^2 ) (mm) (kN) S,kips(kN) U^2 LIA SULIA (kN) ...

Moving Loads and Influence Lines ANALYSIS OF BEAM CARRYING MOVING CONCENTRATED LOADS The loads shown in Fig. 41 a traverse a bea ...

Calculation Procedure: Determine the magnitude of the resultant and its location Since the member carries only concentrated loa ...

(b) Transmission of load through floor beams FIGURE 48 Consider thai a moving load traverses the bridge floor from right to left ...

FORCE IN TRUSS DIAGONAL CAUSED BYA MOVING UNIFORM LOAD The bridge floor in Fig. 48« carries a moving uniformly distributed load. ...

(c) Influence line for shear in panel de FIGURE 49 Assume a load position, and determine whether Vde increases or decreases Con ...

Place the system in the position thus established, and compute Vde Thus, RL = 50(100 + 6 - 13.8)7200 = 23.1 kips (102.75 kN). T ...

Calculation Procedure: Place the unit load in position, and compute the bending moment The moment of all forces acting on the t ...

Assume that locomotion proceeds from left to right, and compute the bending moment Study shows that Mb increases as the system ...

Calculation Procedure: Start the graphical construction Draw a line through A and C, intersecting the vertical line through B a ...

DEFLECTION OF A BEAM UNDER MOVING LOADS The moving-load system in Fig. 53a traverses a beam on a simple span of 40 ft (12.2 m). ...

From the Specification, the allowable stresses are as follows: Tensile stress in connect- ed member, 22,000 lb/in^2 (151,690.0 k ...

INVESTIGATION OFA LAP SPLICE The hanger in Fig. 55a is spliced with nine %-in (19.05-mm) rivets in the manner shown. Compute the ...

Compute the tensile capacity of the plate The tensile capacity Pt Ib (N) of plate A (Fig. 55) is required. In structural fabric ...

Study of the above computations shows that the rivet pattern is satisfactory. Design the splice plates To the left of the cente ...

Determine the required number of rows of rivets Adopt, tentatively, the minimum allowable pitch, which is 2 in (50.8 mm) for %- ...