Evaluation Of Concrete Hollow Block (CHB) Masonry Infilled Walls as A Structural Member of the 4-Storey DJGHS BLDG Using Strut-And-Tie Model Considering Nonlinear Analysis

Abstract

This paper focused on the effectiveness of Concrete Hollow Block (CHB) masonry infilled walls as a structural member by applying Strut-and-Tie Method (STM) using Pushover Analysis and Non-Linear Response History Analysis on the performance behavior of seismic activity in a low-rise building considering in-plane strength, rigidity, ductility, and stiffness. Concrete Hollow Block (CHB) infill walls are the most commonly used partition walls in construction in the Philippines. Though it is considered nonstructural and is not included in design models, by analysis, infill walls can help reduce the damage from seismic activity. This study aims to consider the Concrete Hollow Block (CHB) masonry infill wall as a structural member in analysis and determine its influence on the stability of the structure. Pushover analysis was used to determine the behavior of the structure during seismic activities, and four factors were considered. Stiffness gives an 8.62307% difference using the strut and tie method while 19.9928406 %, 19.46441%, and 19.66178% difference for rigidity considering three structural performance levels: immediate occupancy, life safety, and collapse prevention, and 18.1274404%, 15.4238879%, and 13.9694582% considering in-plane strength. Ductility, however, shows the same result using the two design methods. The result proved that the strut and tie approach have a substantial effect on resisting elastic deformation and deflection and reducing the impact of lateral force, making the structure more stable.