Dynamic properties of watertowers assembled from interlocked panels under different loading conditions

Earthquakes produce some of the most violent loading situations that a structure can be subjected to and if a structure fails under these loads then inevitably human life is put at risk. One of the most common methods by which a structure fails under seismic loading is at the connection of structural elements. The research presented in this paper compares the performance of mathematical models of watertowers under seismic conditions. One type of model is assembled withconcrete panels that are connected by means of a novel interlocked mechanism. The performance of this modelwas tested against the performance of a conventional monolith watertower. Two variables were applied simultaneously when testing each model: earthquakes with different magnitudes and different mass of the elevated water tanks. The results of this experimental study demonstrated that across all tested seismic conditions, increasing the mass of the water tanks resulted in greater deformation of the watertowers. This was most pronounced for the monolith watertower model. With increasing mass of the water tanks across all seismic conditions, those watertowers composted of interlocked panels withstood increasing loading stresses more effectively than the monolith watertower

Strength development of concrete made with recycled glass aggregates subjected to frost curing conditions

An experimental investigation was undertaken to study whether the strength behavior of concrete made with glass aggregate differed significantly from that made with natural aggregates when concretes cured in low temperatures. The aim of the research work presented is to examine the strength behavior of glass concrete when cured under freezing conditions at -15°C and -10°C. The results showed that when glass concrete is cured at low curing temperature, the 28 day compressive strength is higher than control concrete. Glass concrete that had been cured at low temperatures and subsequently allowed normal curing recovered 100% of its strength while the recovery for control concrete was of about 50%. These findings suggest that concrete made with recycled glass could have an important application, on cold temperature concreting