Unprocessed Accelerometer Data from Fraeylemaborg, Slochteren, during 22.05.2019 Westerwijtwerd Earthquake of ML3.4

Unprocessed (raw) data from SHM (Structural Health Monitoring) network at Fraeylemaborg in Slochteren, Netherlands. The data is produced by Hanze University of Applied Sciences, Research Centre of Built Environment NoorderRuimte, Research Group on Earthquake Resistant Structures (www.eqresearch.nl) with the courtesy of Stichting Fraeylemaborg (www.fraeylemaborg.nl) and in cooperation with BuildinG (www.building.nl). The relevant earthquake data (time, location etc.) are given in the data file

Experimental characterization of the axial behavior of traditional masonry wall metal tie connections in cavity walls

In recent years, the number of human-induced earthquakes in Groningen, a large gas field in the north of the Netherlands, has increased. The majority of the buildings are built by using unreinforced masonry (URM), most of which consists of cavity (i.e. two-leaf) walls, and were not designed to withstand earthquakes. Efforts to define, test and standardize the metal ties, which do play an important role, are valuable also from the wider construction industry point of view. The presented study exhibits findings on the behavior of the metal tie connections between the masonry leaves often used in Dutch construction practice, but also elsewhere around the world. An experimental campaign has been carried out at Delft University of Technology to provide a complete characterization of the axial behavior of traditional connections in cavity walls. A large number of variations was considered in this research: two embedment lengths, four pre-compression levels, two different tie geometries, and five different testing protocols, including monotonic and cyclic loading. The experimental results showed that the capacity of the connection was strongly influenced by the embedment length and the geometry of the tie, whereas the applied pre-compression and the loading rate did not have a significant influence.</p

Experimental characterization of the axial behavior of traditional masonry wall metal tie connections in cavity walls

In recent years, the number of human-induced earthquakes in Groningen, a large gas field in the north of the Netherlands, has increased. The majority of the buildings are built by using unreinforced masonry (URM), most of which consists of cavity (i.e. two-leaf) walls, and were not designed to withstand earthquakes. Efforts to define, test and standardize the metal ties, which do play an important role, are valuable also from the wider construction industry point of view. The presented study exhibits findings on the behavior of the metal tie connections between the masonry leaves often used in Dutch construction practice, but also elsewhere around the world. An experimental campaign has been carried out at Delft University of Technology to provide a complete characterization of the axial behavior of traditional connections in cavity walls. A large number of variations was considered in this research: two embedment lengths, four pre-compression levels, two different tie geometries, and five different testing protocols, including monotonic and cyclic loading. The experimental results showed that the capacity of the connection was strongly influenced by the embedment length and the geometry of the tie, whereas the applied pre-compression and the loading rate did not have a significant influence.Applied Mechanic

Experimental seismic assessment and protection of museum artefacts

Earthquakes are a major threat to monuments and to museums and their valuable contents worldwide. The protection of cultural heritage structures and also of museums and their treasures against earthquakes is hence a top priority. The paper will present large scale shaking table tests on cultural heritage assets and will emphasize on the use computing models in tandem with experimental testing. More specifically, the paper will present an extensive experimental campaign on the seismic response of artefacts, with emphasis on statues and busts. The tests have been carried out in the framework of SEREME project (Seismic Resilience of Museum Contents) at the AZALEE seismic simulator of CEA in Saclay, Paris under the auspices of the EC funded SERA project. The aim is to understand the seismic response of statues and busts and then develop novel and cost-effective risk mitigation schemes for improving the seismic resilience of museum valuable contents. The study is focused on the investigation of the seismic response of two real-scale marble roman statues and three busts of three roman emperors standing on pedestals of different types and size. Both non-isolated and seismically isolated artefacts are considered, while two new and highly efficient base isolation systems, tailored to art objects, have been tested. The first isolator is a pendulum-based system, while the second utilizes Shape Memory Alloy wires. Specifically tailored, numerical models of varying complexity, for single and two-block rocking systems, were developed for the needs of this study and are also assessed against the experimental result