Advanced Methods of Structural Analysis

3.4 Trusses with Subdivided Panels 55 an immediate application of the joints and through section methods might lead to some diff ...

56 3 Multispan Beams and Trusses The main purpose of a secondary truss is to transmit a load, which is applied between the joint ...

3.4 Trusses with Subdivided Panels 57 The elements of trusses with subdivided panels can be arranged into three groups as follow ...

58 3 Multispan Beams and Trusses The internal forces in the elements of the secondary truss should be calculated considering onl ...

3.4 Trusses with Subdivided Panels 59 and (2). However, for modification (3) thisstructure becomes geometrically change- able an ...

60 3 Multispan Beams and Trusses Influence lines for reactions are constructed in the same manner as in the case of a simple tru ...

3.5 Special Types of Trusses 61 ForceD 5 - 6 ,Main Truss: The SPLC Is Panel 5-7; Ritter’s Point Is at Infinity PD 1 left at SPLC ...

62 3 Multispan Beams and Trusses only. These horizontal reactionsHADHBDHare calledthrust. Often such types of structures are cal ...

3.5 Special Types of Trusses 63 The construction of the influence line for thrustHis presented here in tabulated form. It is evi ...

64 3 Multispan Beams and Trusses ForceU 3 - 5 (Section 1-1, SPLC Is Panel 4-6; Ritter’s Point is 4) PD 1 left at SPLC P= 1 right ...

3.5 Special Types of Trusses 65 C A B Hinged chain Hanger a C A B Hinged chain b A B C c Hinged chain Fig. 3.22 Trusses with hin ...

66 3 Multispan Beams and Trusses Reaction of Supports and Internal Forces ReactionsRAandRBfor any load can be calculated using f ...

3.5 Special Types of Trusses 67 Construction of the influence line forHis presented in the table below. PD 1 left at SPLC PD 1 r ...

68 3 Multispan Beams and Trusses Example 3.2.The structure in Fig.3.23is subjected to a uniformly distributed load qwithin the e ...

3.5 Special Types of Trusses 69 supports, respectively. For this truss, we haveW D 2  14  24  4 D 0. Thus, the truss in Fig.3 ...

70 3 Multispan Beams and Trusses For each condition, the force in the substituted bar can be found in two steps: first, compute ...

3.5 Special Types of Trusses 71 Ta b l e 3. 1 Computation of internal force in substitute bar State Design diagram Free-body dia ...

72 3 Multispan Beams and Trusses influence line, but this procedure is repetitive and bothersome; mainly, it is essen- tially po ...

Problems 73 a c b d Fig. P3.1 3.2.Vertical settlement of supportAof the beam in Fig. P3.2 causes appearance of internal forces i ...

74 3 Multispan Beams and Trusses 3.5.Where concentrated loadPshould be located (Fig. P3.5) (a)For maximum positive (negative) re ...