Se encontraron 10 investigaciones en el año 2015
In recent years in Peru, many parapet walls or sills in buildings are built with silica lime masonry units of 100-mm thickness (called placa P-10 in Peru). Their behaviour under out-of-plane forces due to a severe earthquake is yet unknown, despite that the failure by overturning of the parapets could be extremely dangerous. This paper deals with the experimental behaviour of four different P-10 parapets under out-of-plane forces. The tests consisted in shaking table tests and static monotonic loads, performed at the Structures Laboratory of the Catholic University of Peru. The dimensions of the four walls were 1.53 m long, 0.9 m tall, and 100 mm thickness. They were constructed with different specifications, using the same construction materials and workmanship. After visiting several buildings under construction, we selected the worst and the best construction technique of P-10 parapets, in order to compare them with the producer¿s specifications.
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In Peru, many parapet walls in medium or tall buildings are built without care of their behavior under out-of-plane seismic forces. This paper deals with the experimental out-of-plane seismic tests on four different parapet brick masonry walls, performed at the Structures Laboratory of the Catholic University of Peru, with different bracing conditions. The clay brick wall parapets were constructed of 1.2 m long, 1m high and 120mm thickness over an RC foundation. Two RC square columns (120 mm side) were later added as lateral braces in three of the specimens, using a toothed connection, simulating the retrofit to an existing parapet wall. The variations were in the reinforcement bars and the anchorage into the bottom beam. The four parapet walls were constructed using the same construction materials and workmanship. The experimental results of shaking table tests and static test are discussed, giving warnings to unbraced masonry walls which collapsed under a moderate earthquake.
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