Micro-Scale Experimental Approach for the Seismic Performance Evaluation of RC Frames with Improper Lap Splices

• Published in: Infrastructures (Basel) Vol. 8; no. 3; p. 56
• Main Authors: Javed, Ali, Krishna, Chaitanya, Ali, Khawaja, Afzal, Muhammad Faheem Ud Din, Mehrabi, Armin, Meguro, Kimiro
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.03.2023
• Subjects: Applied Element Method (AEM); Building codes; Building construction; Columns (structural); Compressive strength; Defects; Design; Developing countries; Earthquake damage; Earthquake loads; Earthquake resistant design; Earthquakes; Frames; Framing (Building); improper lap splice; Lateral loads; LDCs; Methods; micro-concrete; non-engineering defects; Performance evaluation; Provisions; Reinforced concrete; Reinforced concrete construction; reinforced concrete frame; Seismic engineering; Seismic response; shake table test; Structural integrity; Tensile strength; Yield stress; United States; Pakistan
• ISSN: 2412-3811; 2412-3811
• DOI: 10.3390/infrastructures8030056

Reinforced concrete (RC) frames are an integral part of modern construction as they resist both gravity and lateral loads in beams and columns. However, the construction methodologies of RC frames are vulnerable to non-engineering defects, particularly in developing countries. The most common non-engineering defect occurs due to improper lap splice, which can compromise the structural integrity. This research demonstrates an easy, low-cost, and verifiable experimental technique incorporating micro-concrete to evaluate the seismic performance of a completely engineered RC frame with the defect of improper lap splice. The micro-concrete was prepared by using the locally available material for a target compressive strength and then two scaled-down RC frames (1/16 scale) were prepared, including one proper frame and another with improper lap splice. Finally, these frames were tested on a shake table to study their behavior under various seismic loading conditions. This study quantifies the severity of high-risk structural systems due to non-engineering defects. The experimental results demonstrate that improper lap splice can alter the frame’s damage points, triggering the failure of the whole structure.