In this study, the effects of using andesite powder wastes-produced from natural stone factories as mineral additives in concrete manufacturing-on the compressive strength of concrete were modeled using an Artificial Neural Network (ANN). To achieve this, cement mixtures were produced by using waste andesite powder (WAP) mixture at ratios of 0% (control), 10%, 15% and 20%. The effects of curing time were investigated by preparing specimens at 28 and 90 days. The training set was formed by using cement and the specified WAP mixtures and curing time parameters. It was observed that the results obtained from the training ANNs were consistent with the experimental data.

ABSTRACT:Buildings behave according to their geometrical types, the profile specifications of static structural elements and the classifications of their materials. This structural behavior is a kind of structural reaction to an earthquake. This reaction may be absorbed by the ductility of the structure. There is an indefinite situation in the description of the level of ductility for a static system in the earthquake occurrence calculation for the moment-shifting steel-frame system that consists of square or circular profile elements.This objective of this manuscript is to overcome local buckling on welded RHS column/beam assemblies and thereby establish a design algorithm. We conducted experimental analysis under the cyclical loads by added rigidity plate having different dimensional parameters to a RHS at the assembly point. We optimized the design and the dimension of the plate with the expansion of the subject models of the experimental analysis by using the Ansys finite-element program.Keywords: Turkish Earthquake Code 2007, CHS (Circular Hollow Section), RHS (Rectangular Hollow Section), welded moment resisting connections with rigidity plate, moment resisting steel frame systems, cyclic static loading, moment-rotating relationship, detail of ductility DOI: 10.18057/IJASC.2017.13.1.3 INTRODUCTIONThe energy of an earthquake and the reaction of the structure against that energy define the behavior of a structure under the seismic effect. In other words, a construction uses kinetic energy, the energy of elastic creep, viscose absorbing energy and hysteric energy to absorb the energy applied by an earthquake. If the absorbing energy is greater than the energy from the earthquake, it is blocked by absorbing energy. Contrastingly, if the absorbing energy is less than the energy from the earthquake, the difference between absorption and the energy of the earthquake is balanced by hysteric energy. This difference is referred to as the ductility of a structure. The behavior of the structure against an earthquake and the rigidity of its static elements are crucial in the design of a structure against an earthquake as well as in regard to ductility. It is not desired to have decreases in load-bearing capacity and rigidity while the ductility increases. For that reason the greater rotations are awaited in plastic behavior with no decrease in load-bearing capacity. However, the static elements have failed to meet the large plastic rotations to compensate for the earthquake, due to some negative situations such as local buckling, cracking and torsion.Steel static elements, having different assembly and design geometries, are used in practice. The relationship between profile effect and creep is unique to each system and its particular assembly. This situation affects the structure's ability to absorb energy (ductility). The types of materials of the assembly parts (welds, bolts and strengthening plates) in the system, the application quality and