International Journal of Sustainable Building Technology and Urban Development ISSN:2093-761X(Print) 2093-7628(Online)

Design of steel structures is depends on load bearing capacity of members which are interconnected together with different type of joints or connections. These connections transfer and distribute the load in over all structure to maintain structural stability. Hereby connections have a significant contribution in design of steel structure moreover design of complete entity depends on stress dissemination capacity of connections. Rolled steel sections are connected by any of the methods among welding, bolting and riveting depending upon the design requirement. Joints of various pattern are fabricated in order to optimize their efficiency of transmitting load from one member to another without failure. This concludes that bearing capacity of joint must be equivalent or greater than those sections in between which load is transmitted. Bolted steel connections are invariably adopted for construction of steel structures, design methodology of bolted joints adopted from conventional codes is implemented while calculating yield capacity of bolted joints. Standard codes of design require revision and development for given equations as suggested by field execution and failure analysis. The recurrent failure mechanism in bolted steel connections is classified in three different forms, namely yielding of gross section, rupture of critical section and block shear failure, of these block shear mechanism of failure is frequent. This mechanism involves fracture of section in two perpendicular planes, along the direction of force and perpendicular to direction of applied force. Equation of block shear strength from different codes were worked out and in conjugation with results obtained from experimental analysis and modelling output, existing equation was modified for optimization of joints which fail under the influence of block shear strength.