The University Centre for Energy Efficient Buildings of CTU in cooperation with PROPASIV s.r.o. has developed an anchor element designed to break the thermal bridge in case of attachment of pre-projected structures to contact-insulated facade systems. The solution of the anchor element enables load transfer (pressure, tension, bending) with complete interruption of its metal part, i.e. also the thermal bridge. This innovative solution simultaneously offers high variability in attaching the external structure to the anchoring element.
On the basis of partial experiments, which proved the sufficient load-bearing capacity of the individual components of the anchoring element, two useful patterns were given. The anchor elements were tested in the mechanical laboratories of CTU UCEEB during static load tests.
The developed anchoring element provides sufficient load-bearing capacity, for example, for anchoring pergolas and other supporting structures. The anchoring system can also be applied for additional non-load-bearing elements, e.g. outdoor stainless steel chimneys, shading elements, solar and photovoltaic panels, heat pumps and other technological building equipment. As part of the project, an analytical and numerical model was compiled, which was validated and verified during the tests.
The next part of the experimental analysis of the anchor element was focused on verifying the thermal-technical properties of the anchor block. For experimental measurements in the climate chamber, a wall sample was created together with an anchor element. The calculated and experimentally confirmed value of the point coefficient of heat transmission of the anchor element meets the values recommended by the standard for use in passive buildings.
The company PROPASIV s.r.o. already offers new anchoring elements under the company names PROPASIV Block M and PROPASIV Block R.
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The research was carried out with the financial support of TAČR within the project TJ01000432 – Kotevní prvek s přerušením tepelného mostu umožňující variabilní aplikace.