Analysis of Thermal Bridges in Loggias of Pre-Cast Concrete Apartment Buildings

Lubor Kalousek,Zuzana Fišarová,Roman Brzoň,K Prušková,M Flimel,J Mareček,P Juhás,F Kulhánek,J Váchal,M Vochozka,J Melcher,H Fariborz,J Oláh,S Šilarová,I Juhásová Šenitková

doi:10.1051/matecconf/201927903008

Abstract

The issue of complex regeneration of old pre-cast concrete apartment buildings is still a current task of everyday construction practice in the Czech Republic. When designing a new thermal insulation for the envelope of these buildings, we often encounter with critical assembly details. The correct solution of these details requires a detailed assessment in terms of the requirements of thermal protection of buildings. A correct assessment of these critical details is often very challenging and the ordinary designer is virtually unable to do it himself. This paper presents a practical and theoretical example of the design, solution and assessment of additional insulation of loggia loadbearing structures. Using the Ansys software platform, the critical details in 3D were designed and the influence of new thermal insulation on removal of the building defects was assessed. In conclusion, several proposals for possible rehabilitations and their expected efficiency were summarized.

Highlights

The issue of complex regeneration of pre-cast concrete buildings is still a current task of everyday construction practice in the Czech Republic
When designing a new thermal insulation for the envelope of these buildings, we often encounter with critical assembly details whose detailed rehabilitation is typically underestimated in common construction practice, which might lead to the occurrence of defects or failures
This paper presents a real case study how to insulate the connection between the loadbearing loggia side wall and the external wall of pre-cast concrete building of T 06 B – KD system, see Fig. 1

Summary

Introduction

The T 06 B pre-cast concrete building system was designed as short span building system with loadbearing transversal walls and stiffening longitudinal walls when the unified span of the transversal was 3.6 m, and the constructional height of the building was 2.8 m. The application of ETICS is currently generally well-known and long-time verified in the practice, it is common practice that buildings are insulated only partially and give rise to inadequate solutions of critical details. The reasons for such partial solutions are most frequently economical, spatial and aesthetic requirements. The question is what the real influence of such a partial insulation is in comparison with a complex solution as will be shown on the case study

Methods

Results

Conclusion