000019940 001__ 19940
000019940 005__ 20170118182347.0
000019940 04107 $$aeng
000019940 046__ $$k2017-01-09
000019940 100__ $$aRavenshorst, Geert
000019940 24500 $$aLarge-Scale Testing Program for the Seismic Characterization of Dutch Masonry Structures

000019940 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019940 260__ $$b
000019940 506__ $$arestricted
000019940 520__ $$2eng$$aThe evaluation of the seismic response of unreinforced masonry buildings is a popular topic all over the world. In recent years, also the Netherlands started to face seismic risk, since the induced seismicity in the north of the country considerably increased (the gas extraction started in 1963, and earthquakes have occurred since the early ‘90s, with the highest magnitude equal to 3.6 on the Richter scale experienced near Huizinge in 2012). This phenomenon has a wide impact on the built environment, which is mainly composed by unreinforced masonry. These buildings were not designed for seismic loading, and present specific characteristics such as very slender walls (a ratio height/thickness equal to 25), limited cooperation between walls and floors, and use of cavity walls, often connected by weak and corroded ties. To predict the behaviour of unreinforced masonry buildings, the use of numerical models and simple analytical design methods is required. These approaches necessitate the characterisation of the masonry at both material and structural level. An extensive large-scale testing program was performed at the Delft University of Technology to create benchmarks for the validation of the numerical and analytical models. The attention was mainly devoted to a terraced house typology, which was widely adopted for housing in the period 1960-1980. These houses were characterised by loadbearing walls of calcium silicate bricks and walls of clay bricks as outer leaves. In this framework, the paper presents an overview of the cyclic pushover tests performed on full-scale walls under either in-plane or out-of-plane loading. Seven full-scale unreinforced masonry (URM) walls were tested under in-plane loading. Two different series of solid brick masonry walls were considered: four specimens (COMP-0a, COMP-1, COMP-2, and COMP-3) were characterized by a high aspect ratio (H/B = 2.5), whereas three specimens (COMP-4, COMP-5, and COMP-6) had low aspect ratios (H/B = 0.6). Also two different configurations were considered, according to the provided boundary conditions at wall ends: cantilever walls, and double clamped walls. Five full-scale URM walls were tested in the out-of-plane direction by applying cyclic loading using a system of airbags. Two different geometries of brick masonry walls were considered: two specimens (COMP-0b and COMP-7) were characterized by a high aspect ratio and tested in a one-way spanning configuration; other three specimens (COMP-10, COMP-11, and COMP-12) had low aspect ratios and were tested in a two-way spanning configuration. All the walls were composed by solid calcium silicate masonry, except specimen COMP-10 which was made of perforated clay brick masonry. Sample COMP-12 contained a window opening, so that two asymmetric piers were determined at the sides of the window. For both the in-plane and the out-of-plane tests a description of the material properties, of the employed set-ups, and of the loading procedures is provided. An overview of the main results is presented.

000019940 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019940 653__ $$aUnreinforced masonry structures; Experiments; Cyclic tests; In-plane behaviour; Out-of-plane behaviour.

000019940 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019940 720__ $$aRavenshorst, Geert$$iEsposito, Rita$$iRots, Jan$$iMessali, Francesco
000019940 8560_ $$ffischerc@itam.cas.cz
000019940 8564_ $$s1821660$$uhttps://invenio.itam.cas.cz/record/19940/files/4753.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4753.
000019940 962__ $$r16048
000019940 980__ $$aPAPER