OBSERVED BEHAVIOUR OF AN INDUSTRIAL COMPLEX WITH PRE-CAST R/C STRUCTURAL MEMBERS SUBJECTED TO THE ATHENS 1999 EARTHQUAKE - NUMERICAL SIMULATION OF ITS RESPONSE

Abstract eng:
This paper studies the dynamic and earthquake behavior of an industrial complex that is located in Aharnai-Athens and was subjected to the strong ground motion of the Athens 1999 Earthquake. This industrial complex is mainly composed of a large industrial hall and an adjacent office building. The columns, beams, roof girders and roof trusses of the industrial hall are all pre-cast reinforced / pre-stress concrete structural elements. This precast structural system is complemented with shear walls in both horizontal directions in the perimeter of the industrial hall which were cast in place and connected to the pre-cast structural columns. All the pre-cast beams are simply supported and connected to the pre-cast columns through metal anchor bars and/or extended ties. The foundation is also formed by precast pocket elements and ground beams which are interconnected between with cast in-place parts. The office building is a three-storey structure with a basement that is separated from the industrial hall with a construction joint. The foundation and the columns of this building are cast in place whereas part of the beams and all the slabs are pre-cast and are joined with the columns through metal extended ties and cast in-place concrete. This industrial complex is located at the epicentral area of the Athens 1999 earthquake which caused considerable destruction to industrial and residential buildings located in the vicinity of the industrial complex that is examined here. The structural damage observed in this industrial complex was the dislocation of a heavy pre-cast girder at the façade of the office building as well as cracking of the horizontal beams at the locations where they joined the columns. On the contrary, no dislocation of the pre-cast girders could be seen at the industrial hall which performed rather satisfactorily with minor signs of distress. These two distinct structural systems were numerically simulated in an effort to study their dynamic and earthquake response and correlate it with the observed performance. The present investigation demonstrated that the page 1

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