دانلود کتاب اتصالات میدان پیچ شده برای اعضای خمشی پل فولادی نمای کلی و نمونه های طراحی

A splice is defined in AASHTO LRFD Article 6.2 as a group of bolted connections, or a welded connection, sufficient to transfer the moment, shear, axial force or torque between two structural elements joined at their ends to form a single, longer element. In steel bridge design, splices are typically used to connect girder sections together in the field; hence, the term field splices is often used. The design of splices is covered in AASHTO LRFD Article 6.13.6. The design of bolted splices is covered in AASHTO LRFD Article 6.13.6.1, and the design of welded splices is covered in AASHTO LRFD Article 6.13.6.2. This document concentrates on the specifics related to the design of bolted field splices for steel-bridge flexural members, as outlined in AASHTO LRFD Article 6.13.6.1.3. The discussion includes an overview of the design procedure for bolted field splices for flexural members given in the 9th Edition AASHTO LRFD Bridge Design Specifications (2020), along with three design examples illustrating the application of the design procedure. Two of the design examples illustrate the application of the procedure to the design of bolted field splices for I-girder flexural members, and the last design example illustrates the application of the procedure to the design of a bolted field splice for a tubgirder flexural member. A schematic of a typical bolted field splice for a flexural member is shown in Figure 1-1 (shown for an I-section). Bolted girder splices generally include top flange splice plates, web splice plates and bottom flange splice plates. In addition, if the plate thicknesses on one side of the joint are different than those on the other side, filler plates are used to match the thicknesses within the splice. For the flange splice plates, there is typically one plate on the outside of the flange and two smaller plates on the inside of the flange; one on each side of the web. For the web splice plates, there are two plates; one on each side of the web, with at least two rows of high-strength bolts over the depth of the web that are used to connect the splice plates to the member.