Reliability estimates of unconfined compressive strength values from laboratory results for speci... more Reliability estimates of unconfined compressive strength values from laboratory results for specimens compacted at British Standard Light (BSL)for compacted quarry dust treated black cotton soil using cement for road sub-base material was developed by incorporating data obtained from Unconfined compressive strength (UCS) test gotten from the laboratory test to produce a predictive model. Data obtained were incorporated into a FORTRAN-based first-order reliability program to obtain reliability index values. Variable factors such as water content relative to optimum (WRO), hydraulic modulus (HM), quarry dust (QD), cement (C), Tri-Calcium silicate (C3S), Di-calcium silicate (C2S), Tri-Calcium Aluminate (C3A), and maximum dry density (MDD) produced acceptable safety index value of1.0and they were achieved at coefficient of variation (COV) ranges of 10-100%. Observed trends indicate that WRO, C3S, C2S and MDD are greatly influenced by the COV and therefore must be strictly controlled in ...
International Journal of Advances in Scientific Research and Engineering (ijasre), 2020
The Reliability Analysis of a Prestressed Concrete Beam (PCB) was presented using First Order Rel... more The Reliability Analysis of a Prestressed Concrete Beam (PCB) was presented using First Order Reliability Method and Euro code 2 procedures to carry out the analysis. The results show that the safety of the PCB in bending decreased from 2.9 to 1.0 and 3.1 to 2.6 as prestress force and the depth from the extreme compressive fiber to the neutral axis of the beam increased from 20kN to 100kN and 150mm to 350mm respectively, therefore the PCB is safer at low prestress force and depth to the bottom layer of the beam. Also, the target safety indices considering bending criteria of the prestressed beam was obtained to be 2.01
Reliability estimates of unconfined compressive strength values from laboratory results for speci... more Reliability estimates of unconfined compressive strength values from laboratory results for specimens compacted at British Standard Light (BSL)for compacted quarry dust treated black cotton soil using cement for road sub-base material was developed by incorporating data obtained from Unconfined compressive strength (UCS) test gotten from the laboratory test to produce a predictive model. Data obtained were incorporated into a FORTRAN-based first-order reliability program to obtain reliability index values. Variable factors such as water content relative to optimum (WRO), hydraulic modulus (HM), quarry dust (QD), cement (C), Tri-Calcium silicate (C3S), Di-calcium silicate (C2S), Tri-Calcium Aluminate (C3A), and maximum dry density (MDD) produced acceptable safety index value of1.0and they were achieved at coefficient of variation (COV) ranges of 10-100%. Observed trends indicate that WRO, C3S, C2S and MDD are greatly influenced by the COV and therefore must be strictly controlled in ...
International Journal of Advances in Scientific Research and Engineering (ijasre), 2020
The Reliability Analysis of a Prestressed Concrete Beam (PCB) was presented using First Order Rel... more The Reliability Analysis of a Prestressed Concrete Beam (PCB) was presented using First Order Reliability Method and Euro code 2 procedures to carry out the analysis. The results show that the safety of the PCB in bending decreased from 2.9 to 1.0 and 3.1 to 2.6 as prestress force and the depth from the extreme compressive fiber to the neutral axis of the beam increased from 20kN to 100kN and 150mm to 350mm respectively, therefore the PCB is safer at low prestress force and depth to the bottom layer of the beam. Also, the target safety indices considering bending criteria of the prestressed beam was obtained to be 2.01
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