Curvas de fragilidad para evaluar el da？o sísmico en edificios de concreto armado con losas reticulares

structures with an inadequate seismic performance are the main source of the human death and economic losses when a major earthquake strikes an urban area. to improve buildings design one have to begin by carrying out seismic risk analysis in urban areas, which permit to assess the seismic vulnerability in these zones and to estimate the probable damage can be suffer by a seismic event. currently, many of the housings in barcelona, spain, are multi-storey waffle slabs reinforced concrete buildings. in fact, this typology is the second most representative in the city and the number of this type of buildings is increasing because, at present, this is the most extended construction system. this work is a contribution to the analysis of the seismic behaviour of this type of buildings and it faces the seismic risk analysis in an urban area situated in a low seismic hazard region. in order to carry out a suitable analysis it is necessary to have enormous information, that often it is not available and, in addition, there exists a great amount of involved uncertainties; therefore, the adequate treatment of the problem is the probabilistic. in this work, the vulnerability and the seismic risk of waffle slabs reinforced concrete buildings are evaluated by means of a methodology based in the capacity spectrum method. the structural models used in the analysis correspond to buildings of 8, 5, 3 and 2 storeys. for each one of these buildings capacity and fragility curves are obtained. for a likely seismic demand in barcelona, two specific seismic scenarios were considered. taking into account all these results, the probability damage matrixes are also obtained.