Impact Response of Preplaced Aggregate Fibrous Concrete Hammerhead Pier Beam Designed with Topology Optimization

Crystals

Mugahed Amran¹  C.M.Vivek Vardhan²  Yuriy Vasilev³  Nikolai Vatin⁴  Roman Fediuk⁵  Gunasekaran Murali⁶  MeivazhisalaiParasuraman Salaimanimagudam⁶ 

[1] Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 16273, Saudi Arabia;Department of Civil Engineering, Malla Reddy Engineering College (Autonomous), Maisammaguda, Hyderabad 500015, India;Moscow Automobile and Road Construction University, 125319 Moscow, Russia, [e-mail];Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;Polytechnic Institute, Far Eastern Federal University, 690922, Vladivostok, Russia;School of Civil Engineering, SASTRA Deemed to be University, Thanjavur 613401, India;

关键词: topology optimization;    fiber;    compressive and impact strengths;    beam;    grout;    preplaced aggregate fibrous concrete.;   

DOI  :  10.3390/cryst11020147

来源: DOAJ

【 摘 要 】

This research aimed to study the impact response of topology optimized hammerhead pier beam (HPB) based on the density approach. The HPB is prepared with the concept of preplaced aggregate fibrous concrete (PAFC) comprising two primary approaches; first, the coarse aggregate and fiber are prepacked into the designed formwork. Second, the gaps between the aggregate and fiber are filled with cement grout. In this work, an attempt has been made to study an impact response of HPB made with PAFC. Five HPBs were prepared and strengthened with steel fibers with two different schemes, Firstly, the HPB was reinforced with a full cross-section at 2 and 4% of steel fiber, while another set of beams were only reinforced in the tension zone with the same amount of fibers. The study parameters included compressive strength, impact strength, impact ductility index, number of main and secondary cracks, and failure pattern. It was observed that the PAFC had an increase in compressive strength up to 56.9%, compared with nonfibred concrete. A fully fibered concrete beam with 4% fiber addition was the best at taking impact, and the initial crack and failures were observed at 2725.1 J and 3009.8 J, respectively, compared with non-fibered and tension zone fibered concrete beams. Compressive local damage and transverse flexural cracks were observed, which had caused initial cracks and final failure. The HPB with a full reinforced scheme at 4% dosage exhibited higher impact strength than the normal concrete and beam reinforced only in the tension zone.

【 授权许可】

Unknown