Studying bolt force distribution in ultra-large capacity end-plate connections

Abstract

Bolted connections are classified according to their flexural resistance and rotational stiffness. The moment capacity of any connection is controlled by its different components (end-plate thickness, bolt diameter, bolt grade and stiffeners (if any)). Increasing the number of bolts in the tension zone achieves a higher moment capacity for the connection. In this paper, the ultra-large capacity connection with 12 bolts in tension (4 bolts per row) is studied. A proposed finite element model was built and verified using experimental results. A parametric study is carried out using different parameters: end-plate thickness, bolt diameter, effect of horizontal stiffeners and their thickness. Results are presented in the form of curves using the relation between end-plate thickness and the moment capacity for different parameters. Moreover, bolt force distribution is studied at yielding and ultimate limit of connection. Results showed that the chosen parameters are effective on moment capacity and bolt force distribution among bolts.