Experimental response of URM single leaf and cavity walls in out-of-plane two-way bending generated by seismic excitation

Graziotti, Francesco; Tomassetti, Umberto; Sharma, Satyadhrik; Grottoli, Luca; Magenes, Guido

doi:10.1016/j.conbuildmat.2018.10.076

Cited by 58 publications

(78 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• the rocking problem is formulated in a fashion very similar to the one of a classic elastic oscillator (EO), more familiar to engineers, while accounting for the major differences between the two systems highlighted in Makris and Konstantinidis 17 ; • its implementation in already available finite-element environments is straightforward and will simplify a comparison with static-equivalent code procedures; • modelling both the pre-cracking (ie, before full development of mechanism) and the post-cracking response of walls responding in one-way 33 or two-way bending [34][35][36] is possible. During post-cracking behaviour, the overall dissipated energy is given primarily by impacts and secondary by some hysteretic dissipation, both accounted for by the proposed EVD models; • accounting for additional sources of viscous energy dissipation, such as related to the response of attached horizontal structures, is streamlined 37 ; • a reduced computational effort is necessary, allowing to perform large numbers of nonlinear time-history analyses, such as those necessary to assess the risk for economic and human losses.…”

Section: Introductionmentioning

confidence: 99%

Modelling rocking response via equivalent viscous damping

Tomassetti

Graziotti

Sorrentino

et al. 2019

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Summary The assessment of the out‐of‐plane response of masonry structures has been largely investigated in literature assuming that walls respond as rigid or semi‐rigid bodies, and relevant equations of motion of single‐degree‐of‐freedom and multi‐degree of freedom systems have been proposed. Therein, energy dissipation has been usually modelled resorting to the classical hypotheses of impulsive dynamics, delivering a velocity‐reduction coefficient of restitution applied at impact. In fewer works, a velocity‐proportional damping force has been introduced, by means of a viscous coefficient being constant or variable. A review of such models is presented, a criterion for equivalence of dissipated energy is proposed, equations predicting equivalent viscous damping ratios are derived and compared with experimental responses. Finally, predictive equations are examined in terms of incremental dynamic analyses for large sets of natural ground motions.

show abstract

Section: Introductionmentioning

confidence: 99%

Modelling rocking response via equivalent viscous damping

Tomassetti

Graziotti

Sorrentino

et al. 2019

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…1 . Characteristics of the employed input motions and their sequence along with the employed scaling factors are summarised in Table 4 of the reference article [1] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…Each specimen was densely instrumented with various sensors measuring accelerations and displacements throughout the testing sequence. The locations of these sensors and their operating status throughout the testing sequence ( Table 4 of reference article [1] ) is provided in Table 1 , Table 2 , Table 3 , Table 4 , Table 5 and Fig. 2 , Fig.…”

Section: Datamentioning

confidence: 99%

Dataset from dynamic shake-table testing of five full-scale single leaf and cavity URM walls subjected to out-of-plane two-way bending

et al. 2019

Self Cite

View full text Add to dashboard Cite

This paper provides information related to the sensor measurements obtained from five different unreinforced masonry (URM) walls subjected to incremental dynamic shake-table tests at EUCENTRE, Pavia, Italy. This information has been made available to assist in the development and calibration of analytical and numerical models intended to simulate the out-of-plane (OOP) two-way bending response of URM walls. For further interpretation of the sensor recordings, and for a detailed discussion on the observed seismic performance of the specimens, the reader is referred to the article entitled “Experimental Response of URM Single Leaf and Cavity Walls in Out-Of-Plane Two-Way Bending Generated by Seismic Excitation” [1]. Videos documenting the failure of each specimen are also available on YouTube [2].

show abstract

“…In this framework, a comprehensive experimental campaign has been carried out since 2014 in a few European laboratories, including the Macrolab/Stevinlaboratory at Delft University of Technology (TU Delft), with a large part of this research focusing on CS brick masonry . The dynamic behaviour was studied at the laboratories of Eucentre in Italy and LNEC in Portugal, with experimental tests on single leaf and cavity walls under in-plane (Graziotti et al 2016a) and out-ofplane (Graziotti et al 2016b(Graziotti et al , 2019 loading, as well as on full-scale structures (Graziotti et al 2017;. The investigation at TU Delft considered quasi-static cyclic loading and was characterised by a multiscale approach, with tests at material (Jafari et al 2017(Jafari et al , 2018, connection (Skroumpelou et al 2018), component (Messali et al 2017;Damiola et al 2018), and structural (Esposito et al , 2019 level.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the in-plane cyclic behaviour of calcium silicate brick masonry walls

Messali

Esposito

Ravenshorst

et al. 2020

Bull Earthquake Eng

View full text Add to dashboard Cite

The material and structural performance of calcium silicate (CS) brick masonry has received relatively little attention in the past, although this material is often used for the construction of low-rise buildings in Central and Northern Europe. Upon the occurrence of induced seismicity in the north of the Netherlands, an extensive testing programme has been conducted since 2014 at Delft University of Technology. The paper presents the outcomes of eight quasi-static cyclic tests performed within this program on CS brick masonry walls under vertical and lateral in-plane loads. Different dimensions, boundary conditions and applied pre-compression loads were considered. Overall, the tests allowed to characterise the in-plane behaviour of CS brick masonry walls. The results confirmed the influence of the shear ratio (i.e. the ratio between the effective height and the length of the wall) on the wall response in terms of prevailing failure mode, initial stiffness, force and deformation capacity, energy dissipation. Besides, the experimental outcomes stressed the difficulty in estimating the effective stiffness and near collapse drift capacity. Additionally, an empirical equation is proposed to predict the peak lateral force. The equation, calibrated against the tests presented in this paper, was validated against an extended dataset of tests performed on CS masonry walls. The equation, which does not need any input of material parameters and is applicable irrespectively of the expected failure mode, can be used to estimate the force capacity of CS masonry walls when no or limited data on the material properties are available. Keywords Unreinforced masonry (URM) • Calcium silicate (CS) bricks • In-plane response • Quasi-static cyclic tests • Displacement and force capacity • Hysteretic behaviour List of symbols d Net top horizontal displacement of the tested walls d E , d W Vertical distance between top and bottom steel beam in the setup on east and west side, respectively f b Normalized compressive strength of masonry units f bt Flexural strength of masonry units * F. Messali

show abstract

Experimental response of URM single leaf and cavity walls in out-of-plane two-way bending generated by seismic excitation

Cited by 58 publications

References 23 publications

Modelling rocking response via equivalent viscous damping

Modelling rocking response via equivalent viscous damping

Dataset from dynamic shake-table testing of five full-scale single leaf and cavity URM walls subjected to out-of-plane two-way bending

Experimental investigation of the in-plane cyclic behaviour of calcium silicate brick masonry walls

Contact Info

Product

Resources

About