M. Mirza Abdillah Pratama, Han Aylie, Buntara Sthenly Gan, B. Sri Umniati, Puput Risdanareni, Shifa Fauziyah
Concrete casting, compacting method, and characteristic of the concrete material determine the performance of concrete as building element due to the material uniformity issue. Previous studies show that gradation in strength exists on building member by nature and negatively influence the load carrying capacity of the member. A pilot research had modeled the concrete gradation in strength with controllable variable and observed that the weakest material determines the strength of graded concrete through uniaxial compressive loading test. This research intends to confirm the recent finding by a numerical approach with extensive variables of strength disparity. The finite element analysis was conducted using the Strand7 nonlinear program. The results displayed that the increase of strength disparity in graded concrete models leads to the slight reduction of models strength. A substantial difference in displacement response is encountered on the models for the small disparity of concrete strength. However, the higher strength of concrete mix in the graded concrete models contributes to the rise of material stiffness that provides a beneficial purpose for serviceability of building members. © 2017 Author(s).
Department of Civil Engineering, Faculty of Engineering, State University of Malang, Malang, Indonesia; Structural and Material Laboratory, Diponegoro University, Semarang, Indonesia; Department of Architecture, College of Engineering, Nihon University, Koriyama, Japan; Vocational School of Civil Engineering, Diponegoro University, Indonesia
