எங்கள் குழு ஒவ்வொரு ஆண்டும் அமெரிக்கா, ஐரோப்பா மற்றும் ஆசியா முழுவதும் 1000 அறிவியல் சங்கங்களின் ஆதரவுடன் 3000+ உலகளாவிய மாநாட்டுத் தொடர் நிகழ்வுகளை ஏற்பாடு செய்து 700+ திறந்த அணுகல் இதழ்களை வெளியிடுகிறது, இதில் 50000 க்கும் மேற்பட்ட தலைசிறந்த ஆளுமைகள், புகழ்பெற்ற விஞ்ஞானிகள் ஆசிரியர் குழு உறுப்பினர்களாக உள்ளனர்.
அதிக வாசகர்கள் மற்றும் மேற்கோள்களைப் பெறும் திறந்த அணுகல் இதழ்கள்
700 இதழ்கள் மற்றும் 15,000,000 வாசகர்கள் ஒவ்வொரு பத்திரிகையும் 25,000+ வாசகர்களைப் பெறுகிறது
Sabrina Vantadori
The purpose of the current study is to demonstrate that the fracture toughness of hybrid fiber-reinforced concrete (HyFR-RCC), which is calculated using a modified two-parameter model, is size-effect independent (MTPM). The fracture behaviour of seven series of single edge-notched specimens made of both plain-RCCs and FR-RCCs (single and hybrid reinforcements), subjected to three-point bending, is simulated using a micromechanical numerical model [1]. To determine fracture toughness, the MTPM is applied to the numerical load vs CMOD curves. A comparison is made with experimental values that are listed in the literature. In order to demonstrate the size-effect independence, RCC specimens of various sizes are computationally simulated, and the fracture toughness is then evaluated analytically using the MTPM.
Before being compacted, layers of dense-graded aggregates, sand, Portland cement, and water are often distributed with one or more bulldozers in a type of stiff-dry, zero-slump concrete called roller-compacted concrete (RCC). In the 1960s, RCC was originally used in the construction of dams before becoming well-liked in the years that followed for the paving of storage areas, municipal and industrial roadways, and dam repair [2-7].The enhanced placement speed and significant cost savings compared to traditional Portland Cement Concrete (PCC) were the main drivers of the growing interest in RCC engineering applications. This is mostly attributable to the RCC mixture's differing constituent proportions compared to the PCC mixture, with a higher ratio of fine aggregates allowing for tight packing and consolidation. As a result, it is possible to obtain a fresh RCC that is stiffer than normal zero-slump concrete. In actuality, the combination is wet enough to allow for appropriate mixing and distribution of the paste without segregation while at the same time remaining stiff enough to maintain stability under vibratory rollers.