M30, M36 holding down bolts. 6.2.2 HIGH-STRENGTH STRUCTURAL BOLTS The high-strength structural bolt is most commonly used in diameters:M16 designed connections in small members. M20, M24, M30, M36 flexible connections, rigid connections. Larger sizes (M30, M36) of the high- strength structural bolt should be avoided Analysis of Carrying Capacities of Connections with Apr 01, 2021 · Kim and Lim predicted and estimated the structural behavior of austenitic stainless steel single-shear bolt connection made of two bolts (2 rows and 1 stud array), such as ultimate strength, fracture mode and curling phenomenon. Parametric studies have also been conducted on the edge distance and end distance of other extended variables.
The coefficient of the bearing strength model that considers the influence of the inner bolt is calibrated on the basis of the presented test results as well as on high strength steel connections with several bolts. The presented bearing strength model was adopted in Bolted Connection:Principles, Assembly and Strength The bolts in a butt splice joint with two cover plates are in double shear with two shear planes. Shear capacity of each bolt is twice that of the same diameter in a lap joint. Fig. 4.7 shows the bolt connection for a hanger. A hanger is shown connected to the bottom flange of a girder. In this connection the bolts are in tension. CE 405:Design of Steel Structures Prof. Dr. A. Varma Specification J3.6 indicates that the design tension or shear strength of bolts is FnAb - Table J3.2 gives the values of and Fn - Ab is the unthreaded area of bolt. - In Table J3.2, there are different types of bolts A325 and A490. - The shear strength of the bolts depends on whether threads are included or excluded from the shear planes.
bolted connections are now common place. The introduction of high strength steels has increased the types and grades of bolt available to the designer. The range of bolts now includes ordinary strength steels bolts such as grades 4.5, 4.6 and 5.6 and high strength steel bolts HSS Splices Steel Tube InstituteThe familiar steel construction maxim of weld in the shop, bolt in the field, naturally applies. Bolted Splices. Bolts Loaded in Shear. Due to the closed shape of the cross section, bolting directly into the walls of a hollow section is difficult with regular high-strength bolts. STRUCTURE magazine New Twists and Turns in Structural A new consolidated high-strength structural bolt standard, ASTM F3125. Higher tensile strengths and pretensions for large diameter Grade A325 and Grade F1852 bolts. The addition of the 1¼-inch diameter for twist-off type tension control bolts. New 200 ksi high-strength structural bolts
Moe, P., Beg, D.:High strength steel tension splices with one or two bolts. Journal of Constructional Steel Research 66(8-9), 10001010 (2010) CrossRef Google Scholar Rex, C.O., Easterling, W.S.:Behavior and modeling of a bolt bearing on a single plate. Tensioning of Structural Bolts - Steelmasters2 A final level of bolt tightening using high strength structural bolts Category 8.8/S. Different design values must be applied than for procedures 8.8/TF and 8.8/TB using the same bolts, as discussed on page 52. 3 An intermediate level of bolt tension applied as the first stage in full tightening Categories 8.8/TF and 8.8/TB. The The Ultimate Strength of Unsymmetric Beam Bolted Splices The web and bottom flange bolts were 2 1 / 2-in. long, 3 / 4-in. diameter, ASTM A325 high-strength bolts. The bolt holes in the beam were drilled, and those in the splice plates were punched to expedite the fabrication process. The top flange bolts were from one pro-duction lot. Also, the web and bottom flange bolts were from one
Bolted Field Splices for Steel Bridge Flexural Members / 1 . 1 INTRODUCTION . 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.