Assessment of the load capacity of the anchorage system connecting the textured layer with the structural wall of large slab buildings in the lights of experimental research and FEM analysis

Jerzy K Szlendak,Agnieszka Jablonska-Krysiewicz,Dariusz Tomaszewicz,D Beben,A Rak,Z Perkowski

doi:10.1051/matecconf/201817403016

Jerzy K Szlendak, Agnieszka Jablonska-Krysiewicz + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/201817403016

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Abstract

The goal of the article is to compare the results obtained from experimental tests of a new type of anchoring, connecting the texture layer with the structural layer in external wall elements, used in large-panel construction with the results from FEM analysis. Two types of samples were subjected to experimental tests: single-layer uniform concrete and three-layer concrete with embedded point anchors and analogous samples with glued anchors. The test elements used C 12/15 and C 30/37 concrete, 12 mm diameter anchors, made of steel corresponding to the grade of stainless steel screws class 5.8, Sika Anchorfix-1 resin and XPS polystyrene. As for the three-layer samples, when testing, two forces were applied: tearing and shearing due to the detachment of the textured layer. The ANSYS program was used for numerical modelling of the analyzed samples. 3D models were built in which solid elements were used. For steel anchors, the material characteristics were taken as a two-line elasticplastic reinforcement. The Drucker-Prager model was used in the concrete elements, the linear-elastic model was adopted for the resin, and the brittle model according to the linear-elastic fracture mechanics for the polystyrene.

Highlights

Strengthening the exterior walls of large-panel buildings is a necessity at this time
Three single layers, including two C 30/37 classes and one C 12/15 class, as well as two three-layer samples made of C 12/15 concrete
The reading of the results was carried out in steps of 5 kN with a uniform increase in the breaking force of 0.5 kN/s and shear force in the case of three-layer samples individually applied load equal to 1.4 kN corresponding to a load of 1 m2 of the textured layer surface

Summary

Introduction

Strengthening the exterior walls of large-panel buildings is a necessity at this time. A number of faults resulting from both manufacturing defects and the progressive degradation of this type of buildings is described extensively in various articles and publications [1, 2, 3, 4, 5]. The problem of the durability of attaching the large panel texture layer is not, unambiguous. With a view to the safe use of large-panel buildings and limiting the risk of detachment of the textured layer, the.

The course of research

Summary of experimental research results

Comparison of the obtained results with the FEM analysis

The direction of further research

Conclusions