Traditional and Innovative Techniques for the Seismic Strengthening of BarrelVaulted Structures Subjected to Rocking of the Abutments

摘要

In this paper, the main results of an experimental, theoretical and numerical study on therocking behaviour of full scale barrel vaulted structures undergoing cyclic horizontalloading is discussed. The main scope of the paper is to provide some evidence of therocking mechanism experienced by these structures when subjected to horizontal forces.The comprehension of the behaviour of such structural systems is fundamental for theirseismic vulnerability assessment, as well as for the design of any possible strengtheningtechnique. Different strengthening solutions are presented and compared: traditionaltechniques, such as extrados thin concrete slab, or masonry spandrel wall; and aninnovative solution with an extrados thin lime slab reinforced by means of glass fibermesh. The experimental results are used to validate both numeric and analytical modelsfor the prediction of the structural response of masonry vaulted structures subjected torocking of the abutments, as well as for the proportioning of the strengthening solutions.