The safety check of a stone arch, made up of voussoir laid dry, under seismic actions is a static matter, considering that the structure behaves as a rigid body. From a technical point of view it is important to avoid that the structure turns into a mechanism, even though also in this case the safety is possible. In fact, after some oscillations, the arch may return to its natural configuration. As well-known the safety of stone arches require the loads thrust line to be anywhere within the arch profile. Being vertical loads fixed, the goal is to define a horizontal load factor such to turn the structure into a mechanism. In this paper the results of a comprehensive numerical investigation, carried out using an iterative method to find the collapse mechanism and the corresponding horizontal load factor, are shown.
The mechanism model in the seismic check of stone arches
Clemente P.;
1998-01-01
Abstract
The safety check of a stone arch, made up of voussoir laid dry, under seismic actions is a static matter, considering that the structure behaves as a rigid body. From a technical point of view it is important to avoid that the structure turns into a mechanism, even though also in this case the safety is possible. In fact, after some oscillations, the arch may return to its natural configuration. As well-known the safety of stone arches require the loads thrust line to be anywhere within the arch profile. Being vertical loads fixed, the goal is to define a horizontal load factor such to turn the structure into a mechanism. In this paper the results of a comprehensive numerical investigation, carried out using an iterative method to find the collapse mechanism and the corresponding horizontal load factor, are shown.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
