Structural Components Of Structural Bolts

1701 Words Sep 9th, 2016 7 Pages
1. Introduction
One of the primary mechanical fasteners that are currently used to connect structural steel members and to transfer loads between the components are structural bolts (Phares et al 2016). Now a days, various types of structural bolts are used in construction activities. But, the ASTM A307, ASTM A325, and ASTM A490 bolts the most common three types of structural bolts. Among the most common three types of structural bolts, ASTM A307 bolts are considered low-strength bolts, while ASTM A325 and ASTM A490 bolts are regarded as high-strength bolts (Kulak et al. 2001). As the main reasons of using structural bolts are to securely connect the structural members together and to transfer the loads to different members safely, the utilisation of structural bolts and their jointing techniques are a critical aspects of all the structures made of steel (Phares et al 2016). The success of a bolted connection of any structural members also depends significantly on the adequate tightening characteristics of bolts (Phares et al 2016). Therefore, the main objective of this research is to explore the various tightening characteristics of a high strength structural bolts made of high tension steel (alloy).
1.1 General Information
In the early days of iron and steel, the principal fasteners were the rivets, but occasionally mild steel bolts were used in structures (ASCE 1967, Jonge 1945). It is well known that the hot-driven rivets can generally produce clamping forces, but cannot…
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