《Bridge engineering handbook桥梁工程手册-16公路桁架桥》.pdf

16 Highway Truss Bridges 16.1 Truss Configurations Historical • Modern 16.2 Typical Components, Nomenclature, and Materials 16.3 Methods of Analysis Two-Force Member Methods — Pin-Connected Truss • Computer Methods 16.4 Floor Systems and Framing Details Conventional Deck Systems Not Integral with Truss Chords • Decks Integral with Truss Chords 16.5 Special Details Hangers and Dummy Chords for Cantilever Bridges • Bearings • Wind Tongue and Bearings for Transverse Forces 16.6 Camber and Erection Camber for Vertical Geometry • Camber of Joints • John M. Kulicki Common Erection Methods Modjeski and Masters, Inc. 16.7 Summary 16.1 Truss Configurations 16.1.1 Historical During the 1800s, truss geometries proliferated. The Historic American Engineering Record illustrates 32 separate bridge truss geometries in its 1976 print shown in Figure 16.1 [1]. These range from the very short King Post and Queen Post Trusses and Waddell “A” trusses to very complex indeter- minate systems, including the Town Lattice and Burr Arch truss. Over a period of years following Squire Whipple’s breakthrough treatise on the analysis of trus