Strength experimental studies of multi-cavity floor slabs support sections in platform joints, taking into account partial pinching

Capa

Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

Domestic standards for large-panel buildings design contain a methodology for calculating multi-cavity floor slabs in platform joints support sections, considering the effect of their partial pinching in walls. The calculation method is based on empirical relationships and does not take into account various factors that can significantly affect the stress-strain state of a join in general and a slab support section in particular. These include joint compression level, as well as the slab support depth. Since the specified features of the existing methodology can lead to incorrect assessment of the multi-cavity slabs supporting sections bearing capacity, experimental studies of platform joints with multi-cavity slabs at various compression levels, as well as sealing depths, have been carried out. When analyzing the test results, it was found that bearing capacity theoretical values calculated according to standard methods do not exceed the actual cracking moment values for most samples. This fact indicates that the methods under consideration assume sufficiently large safety margins. It is established that the magnitude of experimental negative bending moment that occurs on the slab support sections under load at the stage of a crack appearance on the support, considering the free support actual reaction, can reach the values of the theoretical moment obtained according to elastic scheme for support rigid pinching.

Texto integral

Acesso é fechado

Sobre autores

A. Zenin

JSC “Research and Development Center “Stroitel’stvo” A.A. Gvozdev Scientific Research Institute AO

Autor responsável pela correspondência
Email: lab01@mail.ru

Candidate of Sciences (Engineering)

Rússia, 6, 2nd Institutskaya Street, Moscow, 109428

O. Kudinov

JSC “Research and Development Center “Stroitel’stvo” A.A. Gvozdev Scientific Research Institute AO

Email: lab01@mail.ru

Engineer

Rússia, 6, 2nd Institutskaya Street, Moscow, 109428

Bibliografia

  1. Kudinov O.V. The effect of partial pinching in platform joints. In the book. Scientific potential of the construction industry. Collection of abstracts of the III Scientific and Practical Conference of graduate students and young scientists of JSC SIC Stroitelstvo. Moscow, 2023, pp. 27–28. (In Russian). EDN: UENLSY. https://doi.org/110.37538/2713-1157-2023-27-28
  2. Chik V.M., Shcherbak S.B. Investigation of junctions of floor slabs of non-formwork molding with wall structures. Vestnik of the Brest State Technical University. Series: Construction and architecture. 2020. No. 1, pp. 112–117. (In Russian). EDN: NLAKGG. https://doi.org/110.36773/1818-1212-2020-119-1-112-117
  3. Zemlyanskikh S.K., Alyoshin A.N. Full-scale tests of fragments of hollow slabs of non-hollow molding with pinched support ends. Traditions and innovations in construction and architecture. Construction and construction technologies. Collection of articles of the 79th All-Russian Scientific and Technical Conference. Samara, 2022, pp. 28–36. EDN: MRSDDS
  4. Kireeva E.I. The strength of horizontal joints of panels and multi-cavity floor slabs in large-panel buildings. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2013. No. 10, pp. 2–6. (In Russian). EDN: REJQHV
  5. Lazovsky A.D. Features of the work of hollow slabs of non-hollow molding with platform joints. Vestnik of Polotsk State University. Series F. Construction. Applied sciences. 2013. No. 16, pp. 45–50. (In Russian). EDN: TUTTXJ
  6. Lazovsky A.D. Experimental and theoretical studies of shaped joint boards of prestressed hollow plates of non-hollow molding. Vestnik of Polotsk State University. Series F. Construction. Applied sciences. 2014. No. 16, pp. 28–31. (In Russian). EDN: TQISXP
  7. Prokopovich A.A., Repekto V.V., Alyoshin A.N. Hollow plates of non-hollow molding. application problems and research results. In collection: Traditions and innovations in construction and architecture. Construction collection of articles. Samara. 2018, pp. 150–154. EDN: YNUKTR
  8. Ulvis Skadins, Atis Dandens. Load bearing capacity of precast concrete slab–wall connection. IOP Conference Series: Materials Science and Engineering. 5th World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium – WMCAUS 15–19 June 2020. Prague. Czech Republic. Vol. 960.
  9. Zenin S.A., Kudinov O.V. Methods for assessing the impact of partial restraint of hollow core slabs in platform joints on the strength of standard slab cross-sections. Vestnik of NITS stroitelstvo. 2024. No. 43 (4), pp. 7–26. (In Russian) EDN: VYHZGO. https://doi.org/10.37538/2224-9494-2024-4(43)-7-26

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML
2. Fig. 1. Sample testing scheme

Baixar (68KB)
3. Fig. 2. Geometric characteristics of samples 60.20.120 and 70.20.110

Baixar (141KB)
4. Fig. 3. Geometric characteristics of samples 100.20.80 and 90.20.90

Baixar (199KB)
5. Fig. 4. Section A-A

Baixar (137KB)
6. Fig. 5. Slab cross section

Baixar (92KB)
7. Fig. 6. General view of the samples 60.20.120 and 70.20.110 tests

Baixar (244KB)
8. Fig. 7. General view of the samples 80.20.100 and 90.20.90 tests

Baixar (221KB)

Declaração de direitos autorais © Advertising publishing company "STROYMATERIALY", 2025