Beam Column Joint Parametric Study for Conventional Reinforced and Waste Plastic Fiber Concrete Frame Under Seismic Condition

Abstract

This study delves into the innovative use of waste polypropylene-terephthalate (PET) newlinefibers sourced from discarded bottles to elevate the performance of concrete. In an effort to address environmental concerns surrounding plastic waste, particularly PET, this research aims to contribute to sustainable construction practices by repurposing these materials. The investigation involved the creation of 14 concrete batches, varying in PET fiber content from 0% to 1.5% by volume, for both M25 and M40 concrete grades. M25 and M40 concrete grades are chosen for fiber concrete due to their structural adequacy, compatibility with reinforcing fibers, design flexibility, and cost-effectiveness. This range offers a balance between performance and economic considerations, making it suitable for various construction projects. newlineGlobal PET production reached 87.16 million metric tons in 2022, yet a significant newlineamount ends up as plastic waste in the environment after a single use. Only 28.4% of PET is recycled, with the rest discarded, posing a major environmental challenge. Recycling efforts face hurdles like contamination and inadequate infrastructure, leading to pollution and ecological harm. Innovations and regulations aim to improve PET waste management, emphasizing a circular economy and collaboration among stakeholders to reduce its environmental impact. The findings revealed a noteworthy improvement in the splitting tensile strength of concrete when PET fibers were incorporated, with optimal enhancement observed at 1.5% inclusion. However, compressive and flexural strengths exhibited a marginal decline beyond a PET fiber content of 1% by volume. This suggests that PET fiberreinforced concrete can be employed effectively in construction scenarios that demand lower-strength and lightweight materials, thus presenting a dual advantage of cost reduction and sustainability by repurposing PET waste. Seven exterior beam-to-column connections were modeled.