The heat transfer and heat storage capacity are essential aspects of the winter and summer thermal insulation of envelope components. As a co-operation between the Institute for Building Climatology and Energy of Architecture (IBEA) and the Institute for Building Construction and Timber Structures (IBHolz), a building physics thermal transmittance test to determine the system-related thermal conductivity is carried out on various commercially available solid timber elements for external wall constructions in the IBEA's double climate chamber.
Depending on the nature of the student's work, the content and scope of the work can range from the monitoring and scientific evaluation of the thermal transmittance test to the comparison of the test according to DIN EN ISO 8990 (heating box method), EN 12664 (panel method) and the transient hot bridge method, the technical/normative preparation of the determination of the measured/calculated/measured value of the thermal conductivity to the simulation accompanying the test using the WUFI software as a digital twin and evaluation of the thermal storage capacity of the components. The detailed task is then worked out according to the nature of the student's work.
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Modern, robot-assisted joinery methods allow a reassessment of the technical and economic suitability of traditional timber-timber connections and further developments based on them. In the context of the circularity of buildings and building materials, properties such as removability, reusability and varietal purity are becoming increasingly important, whereby the aforementioned connections can offer significant advantages. The aim of work in this subject area can be to research existing timber-timber connections and further developments and cataloguing with an individual assessment with regard to various criteria (e.g. the above-mentioned, load-bearing capacity, ease of assembly, joinery time, ...). Depending on personal interests, further focal points are possible.
Cooperation partner: Marx Krontal Partner
In the context of the circular economy, the deconstructability of buildings is of great importance. The removability of the connections used is crucial for this. Connections with fully threaded screws offer great advantages in terms of rigidity, load-bearing capacity and ease of assembly, which is why they are currently used in large numbers. The theoretically good removability by unscrewing the fasteners can be hindered by various influences (e.g. corrosion, plastic deformation of the fasteners, damage to the fasteners due to incorrect installation, ...). Student work in this field can include, for example, the identification of decisive influencing factors through theoretical research as well as experimental investigations and the derivation of planning/execution recommendations to ensure the best possible availability of such connections.
Cooperation partner: Marx Krontal Partner
Multi-storey timber construction is becoming increasingly important, driven by the growing social demand for sustainability in construction measures and the progressive liberalisation of the corresponding requirements in the state building regulations. When designing the supporting structure, existing concepts from solid and steel construction are often used, which can be implemented and utilised more or less well in timber construction. Within the scope of this work, the concepts commonly used today for the transfer of vertical and horizontal loads are to be researched and analysed for their suitability for use in timber construction. Furthermore, based on this, own concepts suitable for timber construction are to be developed and described.
Cooperation partner: Marx Krontal Partner
Using the example of a complex hall structure, different modelling variants for assessing the effects of imperfections (member stability, tracking of bracing forces) are to be investigated comparatively. Variants to be investigated are, for example, the modelling of planar subsystems or a complex spatial overall model, verification with equivalent member methods or internal forces according to second-order theory, modelling of imperfections. Order, modelling of imperfections due to equivalent loads or geometric deviations.
Cooperation partner: Marx Krontal Partner
Using the example of a complex hall construction, a concept for sensible metrological monitoring of the structure in the sense of a digital twin is to be developed. With the help of a sensitivity analysis, for example by varying the parameters of a numerical calculation model, measurable neuralgic parameters of the structure are to be identified. Based on this, a concept for the metrological recording of these parameters and for drawing conclusions about specific structural conditions is to be developed.
Cooperation partner: Marx Krontal Partner
Various modelling variants for estimating the dynamic behaviour of a hall floor in timber-concrete composite construction are to be investigated on the basis of an existing spatial load-bearing structure. First of all, the currently recognised rules of technology are to be researched and the application limits of the existing structure are to be demonstrated. In addition, the influence of various structural properties and modelling approaches (e.g. impact of undesired clamping effects, compliant bearing, ...) on the vibration behaviour of the floor must be investigated and described. Depending on the scope of the work, proposals can then be developed for the mathematical modelling of the important parameters in an applicable form for verification purposes.
Cooperation partner: Marx Krontal Partner
DIN EN 1998: Design of structures against earthquakes is currently being revised. As part of the work, the current and future design rules are researched and analysed and compared using comparative calculations. The new standard status is comprehensively applied in an example project in a calculation example.
Cooperation partner: Marx Krontal Partner
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