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Performance of partial strength connection connected by thick plate between column flanges
Tahir, Mahmood M.,Juki, Irwan,Ishak, Mohd Y.,Mohammad, Shahrin,Awang, Abdullah Z.,Plank, Roger Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.2
Traditional beam connections to the minor axis of a column have relatively low strength and stiffness. A modified detail, using a plate welded between the toes of the column flange - referred to as a toe plate connection - is examined in this paper. The results of an experimental investigation for both flush and extended end-plate connections connected to a 25 mm thick end-plate are presented. The tests are complemented by finite element modelling which compares very well with the test observations. The results show a significant increase in both moment resistance and initial stiffness for this connection detail compared with connections made directly to the column web. This offers the prospect of more optimal solutions taking advantage of partial strength frame design for the minor axis as well as major axis.
Performance of partial strength connection connected by thick plate between column flanges
Mahmood M. Tahir,Irwan Juki,Mohd Y. Ishak,Shahrin Mohammad,Abdullah Z. Awang,Roger Plank 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.2
Traditional beam connections to the minor axis of a column have relatively low strength and stiffness. A modified detail, using a plate welded between the toes of the column flange - referred to as a toe plate connection - is examined in this paper. The results of an experimental investigation for both flush and extended end-plate connections connected to a 25 mm thick end-plate are presented. The tests are complemented by finite element modelling which compares very well with the test observations. The results show a significant increase in both moment resistance and initial stiffness for this connection detail compared with connections made directly to the column web. This offers the prospect of more optimal solutions taking advantage of partial strength frame design for the minor axis as well as major axis.
Improvement of mechanical properties of bio-concrete using Enterococcus faecalis and Bacillus cereus
Abdullah Faisal Alshalif,Mohd Irwan Juki,Norzila Othman,Adel Ali Al-Gheethi,Faisal Sheikh Khalid 대한환경공학회 2019 Environmental Engineering Research Vol.24 No.4
The present study aimed to investigate the potential of Enterococcus faecalis (E. faecalis) and Bacillus cereus (B. cereus) in improving the properties of bio-concrete. E. faecalis and B. cereus strains were obtained from fresh urine and an acid mire water at cell concentration of 1.16×1012 and 1.3×1012 cells mL-1, respectively. The bacterial strains were inoculated in a liquid medium into the concrete with 1, 3 and 5% as replacement of water cement ratio (w/c). The ability of E. faecalis and B. cereus cells to accumulate the calcite and the decrement of pores size within bio-concrete was confirmed by SEM and EDX analysis. The results revealed that E. faecalis exhibited high efficiency for increasing of compressive and splitting tensile strength than B. cereus (23 vs. 14.2%, and 13 vs. 8.5%, respectively). These findings indicated that E. faecalis is more applicable in the bio-concrete due to its ability to enhance strength development and reduce water penetration.