Reconstruction of the Technical Museum in Zagreb

2013 ◽  
Vol 778 ◽  
pp. 919-926 ◽  
Author(s):  
Vlatka Rajčić ◽  
Dean Čizmar ◽  
Mislav Stepinac
Keyword(s):  
Moisture Ratio ◽  
Timber Structure ◽  
Structural Performance ◽  
Timber Structures ◽  
Large Span ◽  
Entire Structure ◽  
Structure Reconstruction ◽  
Engineering Concept

Technical Museum is one of the most visited Museums in Zagreb (capital of Croatia). The museum presents scientific and educational centre in the field of technical sciences. The entire structure of the Museum is constructed as a timber structure and as such represents a rare existing example of the European engineering concept of expo-halls timber structures with large span (85m x 40 m) from the early 20 century. In this article overview of different NDTs that were performed in order to assess the structural performance of elements is given; moisture ratio and ultrasound investigations are carried out in situ in order to investigate timber condition. Based on the detected state of the structure reconstruction measures are presented.

Numerical Modelling of Historic Vaulted Timber Structures

2013 ◽  
Vol 778 ◽  
pp. 517-525 ◽  
Author(s):  
Carina Fonseca Ferreira ◽  
Dina D’Ayala ◽  
Jose L. Fernandez Cabo ◽  
Rafael Díez
Keyword(s):  
Finite Element Method ◽  
Software Package ◽  
Structural Response ◽  
Shear Stiffness ◽  
Timber Structure ◽  
Structural Performance ◽  
Timber Structures ◽  
Global Response ◽  
Historic Structures ◽  
Numerical Approaches

Historic timber structures forming vaulted roofs of public and ecclesiastical buildings are present worldwide. The structural response of these constructions is usually governed by the structural performance of the joints, the interaction between the timber structure and the masonry parts, and the current condition of both joints and timber members. At present, numerical approaches, such as finite element method-based approaches are well-established tools for investigating the global response of complex historic structures. Using a FE-based software package, the authors developed a numerical model of a portion of an existing historic vaulted timber structure, which is part of the roof of the Cathedral of Ica in Peru, considering the in-plane semi-rigid response of the planked arches in the elastic range. For this purpose, the rotational and shear stiffness of the joints and the properties of the materials, which are assumed in good conditions, are calibrated by comparing the numerical outputs with experimental results available in literature. The aim of the work presented here is to compare the response of the same vault assuming either continuous (planks continuously connected) or discontinuous arches (modelling of the semi-rigid response of the joints which connect the planks together).

In-situ measurement of structural performance of large-span air-supported dome under wind loads

2021 ◽  
Vol 169 ◽  
pp. 108476
Author(s):  
Yue Yin ◽  
Wujun Chen ◽  
Jianhui Hu ◽  
Bing Zhao ◽  
Qin Wang
Keyword(s):  
In Situ Measurement ◽  
Wind Loads ◽  
Structural Performance ◽  
Large Span

Bending Test of the Composite Steel-Timber Beam

2013 ◽  
Vol 351-352 ◽  
pp. 415-421 ◽  
Author(s):  
Masanori Fujita ◽  
Mamoru Iwata
Keyword(s):  
Large Scale ◽  
Building Construction ◽  
Timber Structure ◽  
Bending Test ◽  
Structural Performance ◽  
Timber Structures ◽  
Timber Beam ◽  
Structural Variations ◽  
Mass Consumption ◽  
Composite Steel

In the field of building construction, mass consumption of wood materials contributes to reforestation and becomes the environmental burden reduction. However, an application to conventional timber structures only such as house has a quantitative limit. A newly developed timber structure that is able to make a large-scale building is expected. A composite steel-timber structure will be one of the effective methods to expand the structural variations. In this paper, the bending test of composite steel-timber beam classified typical joint methods is conducted to grasp basic structural performance.

scholarly journals The Cartis Form for the Seismic Vulnerability Assessment of Timber Large-Span Structures

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 45
Author(s):  
Beatrice Faggiano ◽  
Giacomo Iovane ◽  
Andrea Gaspari ◽  
Eric Fournely ◽  
AbdelHamid Bouchair ◽  
...  
Keyword(s):  
Seismic Vulnerability ◽  
Precast Concrete ◽  
Structural Type ◽  
General Description ◽  
Seismic Zone ◽  
Building Structures ◽  
Timber Structures ◽  
Recent Past ◽  
Seismic Vulnerability Assessment ◽  
Large Span

Italy is located in a very active seismic zone, and many earthquakes have marked the country, some of them in the recent past. In order to take adequate measures of seismic prevention and protection, in the last decades, the Italian Civil Protection Department (DPC) initiated a survey and introduced a specific form for the quick and/or post-seismic assessment of buildings. This is useful to obtain statistics on the types of structures and their vulnerability and a judgement on the damage, leading to a decision about the possibility of reuse and/or the level of retrofitting to be applied. Those activities have been developed since the beginning of 2000. This task is currently carried out by the Italian DPC-ReLUIS project research, line WP2 on the inventory of building structures, setting up the CARTIS form for any structural type, like masonry, reinforced concrete, precast concrete, steel, and timber structures, the latter being mainly related to large span buildings, extensively used in Italy. In this context, the paper presents the first draft of the CARTIS form for large span timber structures that provides a general description for typical structural schemes, through the singular points commonly considered as seismic structural vulnerabilities. Moreover, the statistics on timber large span structures based on a sample of 10 buildings is presented.

scholarly journals In-situ density estimation by four nondestructive techniques on Norway spruce from built-in wood structures

Holzforschung ◽  
2018 ◽  
Vol 72 (10) ◽  
pp. 871-879 ◽  
Author(s):  
Daniel F. Llana ◽  
Guillermo Íñiguez-González ◽  
Joaquín Montón ◽  
Francisco Arriaga
Keyword(s):  
Norway Spruce ◽  
Density Estimation ◽  
Penetration Resistance ◽  
Timber Structures ◽  
Engineering Structures ◽  
Wood Structures ◽  
Needle Penetration ◽  
Screw Withdrawal ◽  
The Relationship

AbstractNeedle penetration resistance (NPR), screw withdrawal resistance (SWR), core drilling (CD) and drilling chips extraction (DCE) are nondestructive and semi-destructive techniques used to estimate density in timber structures. In most of the previous studies, these techniques were tested in clear sawn timber and clear specimens. The goal of the present paper is to study the relationship between density and these techniques by means of five different devices in whole pieces of timber from built-in engineering structures, which are from 12 4.5-m long structural timber joists of Norway spruce from a 19thcentury building in Barcelona (Catalonia, Spain). Although determination coefficients (R2) for density estimation models were lower than those from clear timber, the results obtained confirmed that these four techniques are suitable forin-situdensity estimation of woods in buildings. The best results were obtained by CD (the bigger the bit, the higher the correlation), followed by DCE, and SWR. The worst correlation was found for NPR devices, but the results could be probably improved with more measurements.

scholarly journals Structural Monitoring and Safety Assessment during Translocation of Mahavira Hall of Jade Buddha Temple

2019 ◽  
Vol 11 (19) ◽  
pp. 5477 ◽  
Author(s):  
Zhang ◽  
Xue ◽  
Xie ◽  
Zhang ◽  
Lu
Keyword(s):  
Safety Assessment ◽  
Structural Integrity ◽  
Relative Displacement ◽  
Value Theory ◽  
Timber Structure ◽  
Structural Monitoring ◽  
Structural Performance ◽  
Threshold Values ◽  
Limit Value ◽  
The Ancient Chinese

The Mahavira Hall of the Jade Buddha Temple in Shanghai, China is a century-old traditional timber structure with a post-and-lintel construction. To improve the temple’s architectural layout and enhance the lintel structural integrity, the Mahavira Hall was moved 30.66 m and then elevated 1.05 m in September 2017. To assist in the structural translocation and uplift, the authors designed a monitoring system to continuously measure the relative displacement and inclination of the overall structure, individual components, and inside statues to ensure the integrity of the hall and its contents. This article presents and summarizes the priority issues and principles of monitoring the ancient Chinese timber structure. The time series of monitored data are decimated in order to minimize the fluctuation of data. The structural integrity of the Mahavira Hall was evaluated based on the inclination angle of its vital members. Finally, combined with the limit value regulated by code and the predicted early warning threshold values, which are based on extreme value theory, the effect of the translocation on the structural performance was obtained using fuzzy logic.

Analysis on Seismic Damage of Timberwork Building and Reinforcement

2013 ◽  
Vol 671-674 ◽  
pp. 1390-1393
Author(s):  
Rui Liu ◽  
Mu Yi Hou ◽  
Xiao Liu ◽  
Ru Heng Wang
Keyword(s):  
Seismic Damage ◽  
Timber Structure ◽  
Timber Structures ◽  
Seismic Repair

In this paper, the timber structure buildings in the quake damage situation has been summarized. Analysis the rules and characteristics of ancient timber structures in seismic damage. Put forward basic methods for ancient timber structures in strengthening.In order to provides basis and method for timberwork seismic repair or reinforcement.

Activation of transition metal oxides by in-situ electro-regulated structure-reconstruction for ultra-efficient oxygen evolution

Nano Energy ◽  
2019 ◽  
Vol 58 ◽  
pp. 778-785 ◽  
Author(s):  
Huawei Huang ◽  
Chang Yu ◽  
Hongling Huang ◽  
Changtai Zhao ◽  
Bo Qiu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Oxygen Evolution ◽  
Transition Metal Oxides ◽  
Structure Reconstruction

Non-Destructive Tests and Bending Tests on Chestnut Structural Timber

2013 ◽  
Vol 778 ◽  
pp. 167-174 ◽  
Author(s):  
Beatrice Faggiano ◽  
Maria Rosaria Grippa ◽  
Bruno Calderoni
Keyword(s):  
Research Study ◽  
Timber Structures ◽  
Structural Elements ◽  
Bending Tests ◽  
Experimental Activity ◽  
Collapse Mechanisms ◽  
Regression Approach ◽  
Non Destructive ◽  
Non Destructive Techniques

In the context of a more wide research study for in situ mechanical identification of ancient timber structures by non-destructive techniques, the paper illustrates the experimental activity developed on structural elements made of old chestnut timber, 4x4x76 cm size: 24 squared specimens were extracted by six elements in actual dimensions, already used in a previous tests campaign. Non-destructive (ND: hygrometric, sclerometric and resistographic) and destructive (D: bending) tests were performed, the latter according to UNI EN 408 (2004) standard, in order to assess the mechanical properties and the collapse mechanisms of chestnut timber. Data gathered are presented in detail and, NDT-DT correlations, obtained through a linear regression approach, are provided to predict wood density, strength and modulus of elasticity of the tested members.

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