Masonry Vaults Subjected To Horizontal Loads: Experimental and Numerical Investigations to Evaluate the Effectiveness of A GFRM Reinforcement

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Gattesco, Natalino^1 ; Boem, Ingrid^1

Department of Engineering and Architecture, University of Trieste, p.le Europa 1, Trieste

34127, Italy^1

关键词: Experimental test;    Fiber-reinforced mortar;    Horizontal loads;    Loading patterns;    Masonry vaults;    Numerical investigations;    Reinforcement technique;    Strength and ductilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022075/pdf
DOI  :  10.1088/1757-899X/245/2/022075

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The paper investigates the effectiveness of a modern reinforcement technique based on a Glass Fiber-Reinforced Mortar (GFRM) for the enhancement of the performances of existing masonry vaults subjected to horizontal seismic actions. In fact, the authors recently evidenced, through numerical simulations, that the typical simplified loading patterns generally adopted in the literature for the experimental tests, based on concentrated vertical loads at 1/4 of the span, are not reliable for such a purpose, due to an unrealistic stress distribution. Thus, experimental quasi-static cyclic tests on full-scale masonry vaults based on a specific setup, designed to apply a horizontal load pattern proportional to the mass, were performed. Three samples were tested: an unreinforced vault, a vault reinforced at the extrados and a vault reinforced at the intrados. The experimental results demonstrated the technique effectiveness in both strength and ductility. Moreover, numerical simulations were performed by adopting a simplified FE, smear-crack model, evidencing the good reliability of the prediction by comparison with the experimental results.