NUMERICAL INVESTIGATION OF BOLTED SHEAR LINK CONNECTION IN ECCENTRICALLY BRACED FRAMES

• Main Author: Wibowo, Stefan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62414
• Institution: Institut Teknologi Bandung

Eccentrically braced frames are used as one of many earthquake resistant steel building that performs well in terms of lateral rigidity, strength, ductility, and earthquake energy dissipation through the yielding of link element. The replaceable link element is being developed to increase the economic value of a structure due to the earthquake that repeatedly occurs in earthquake-prone areas such as Indonesia. One of the important things in determining the performance of shear link elements is the connection, which requires good performance against the possibility of failure on the connecting plate or on the bolts. Bolt application as connector of replaceable shear link require high and stable shear strength caused by earthquake, in general it needs a lot of pretension bolt. This research study a connection systems on replaceable shear link elements in a form of IWF, with implementation of shear-key to resist high shear force demand and bolt that designed to bear with tension force caused by moment of link connection. Numerical study helped by ABAQUS software is done to learn non-linear behavior of replaceable shear link with focusing on link and connection condition that consist of plate, bolt, and shear-key. Two pieces of connection model have been studied in a form of link end-plate which connected with bolt and shear-key. The first model has same height and width dimension with link profile, whereas the second model using extended-plate with additional bolts. The used of bearing bolt connection and friction connection (with pretension) on all model is studied. Monotonic and cyclic loading with displacement control is done to both model that follow loading protocol from AISC 341-2016 The result of numerical studies is hysteretic curve due to cyclic loads and monotonic load, then being compared and analyze to get the information of plastic deformation behavior happened in shear link, the deformation of end plate, bolt and shear-key. The second connection model in a form of extended-plate shows better yielding level, where end-plate does not yield at all. Output of study show that shear-key carry shear force from link effectively while bolt only endure tension force from end moment of link.