NUMERICAL MICRO MODELLING ANALYSIS FOR IN-PLANE BEHAVIOR OF CONFINED MASONRY WALL AGAINST CYCLIC LOADS

• Main Author: Bisfarian, Galang
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/77450
• Institution: Institut Teknologi Bandung

Confined masonry is a commonly used structural element in residential buildings in Indonesia. Indonesia is located in an earthquake-prone region, and most earthquake damage occurs in residential buildings. This occurs because the structure of residential buildings in Indonesia is generally not well designed to resist earthquake loads. A widely used structural system is masonry walls confined by reinforced concrete (RC) portals. In this structural system, masonry walls have brittle behavior that can reduce the strength and stiffness of the building globally during earthquake, while the RC portal serves to confine the masonry wall which can improve the performance as a confined masonry structural system in resisting earthquake loads. To further study the in-plane behavior of the restrained masonry walls under cyclic lateral loads, numerical analysis of the micro-modelling was carried out with a finite element-based method using LS-DYNA software. The contact definition used on the interface between brick and mortar is the tiebreak contact type. The hysteresis curve of the numerical analysis succeeded in capturing the pinching phenomenon, thus making it quite similar to the experimental hysteresis curve. The prediction of crack patterns obtained from the stress distribution in the numerical model also succeeded in creating crack patterns that were nearly the same as the experimental crack patterns, both in the push phase and the pull phase.