HIGH RISE FRAME BUILDING CONSTRUCTION WITH REGARD TO DEFECTS IN MONOLITHIC BASE SLAB

The paper analyzes the influence of defects detected in a monolithic base slab on the possibility of its further application in the construction of a 25-storey high-rise frame building. Non destructive testing and vertical core sampling techniques are used for the detailed analysis of the monolithic base slab. It is found that irregularities in the procedure during winter concreting of the base slab decreases the strength properties of concrete and provides the defect formation in the slab structure, namely delamination of the lower protective concrete layer and uncovering of working reinforcement. For the safe use of the 25-storey high-rise building, the base slab is proposed to be strengthened by adding in-situ reinforced concrete layer 100 cm thick.

1. Shashkin V.A. Effekty vzaimodeistviya osnovanii i sooruzhenii [Interaction between foundations and structures]. Razvitie gorodov i geotekhnicheskoe stroitel'stvo. 2012. No. 14. Pp. 141–167. (rus)

2. Shashkin A.G., Shashkin K.G. Vzaimodeistvie zdaniya i osnovaniya: metodika rascheta I prakticheskoe primenenie pri proektirovanii [Building and foundation interaction: calculation methodology and practical application in design]. V.M. Ulitskii, Ed., St.-Petersburg: Stroiizdat, 2002. 48 p. (rus)

3. MicroFe-SDK. Programmnyi kompleks konechno-elementnykh raschetov prostranstvennykh konstruktsii na prochnost', ustoichivost' i kolebaniya [MicroFe software package for finite element calculations of strength, stability and vibration of spatial structures]. OOO “TEKhSOFT”, 2015. Available: www.tech-soft.ru

4. Karpenko N.I., Karpenko S.N., Kuznetsov E.N. O sovremennykh problemakh rascheta vysotnykh zdanii iz monolitnogo zhelezobetona [Modern problems of structural analysis of high-rise building of insitu reinforced concrete]. In: II Vseros. (Mezhdunar.) konf. “Beton I zhelezobeton – puti razvitiya”, v pyati knigakh. (Proc. 2nd Int. Sci. Conf. „Concrete and Reinforced Concrete – Glance at Future‟), in 5 vol. Moscow, 2005. V. 1. Pp. 149–166. (rus)

5. Shulyat'ev O.A. Fundamenty vysotnykh zdanii [Foundations of high-rise buildings]. Vestnik PNIPU. Stroitel'stvo i arkhitektura. 2014. No. 4. Pp. 202–244. (rus)

6. Shulyat'ev O.A. Osnovaniya i fundamenty vysotnykh zdanii [Bases and foundations of highrise buildings]. Moscow, 2016. 392 p. (rus)

7. Nuzhdin L.V., Mikhailov V.S. Chislennoe modelirovanie svainykh fundamentov v raschetnoanaliticheskom komplekse SCAD Office [Creation of solid 3D CAD pile foundations in SCAD software]. Vestnik PNIPU. Stroitel'stvo i arkhitektura. 2018. No. 1. Pp. 5–18. (rus)

8. Mikhailov V.S., Teplykh A.V. Uchet kharakternykh osobennostei razlichnykh modelei osnovaniya pri raschete vzaimnogo vliyaniya zdanii na bol'shikh fundamentnykh plitakh s ispol'zovaniem raschetno-analiticheskoi sistemy SCAD Office [Allowing for characteristics of various design models in calculating mutual influence of buildings on pile-raft foundation in SCAD software]. In: VI Mezhdunarodnyi simpozium. Aktual'nye problemy komp'yuternogo modelirovaniya konstruktsii i sooruzhenii (Proc. 6th Int. Sci. Symp. „Relevant Computer Modeling Problems of Structures‟).Vladivostok, 2016. Pp. 133–134. (rus)

9. Kabantsev O.V., Tamrazyan A.G. Uchet izmenenii raschetnoi skhemy pri analize raboty konstruktsii [Consideration of changes in design diagram in structural analysis]. Inzhenernostroitel'nyi zhurnal. 2014. No. 5. Pp. 15–26. (rus)

10. Almazov V.O., Klimov A.N. Eksperimental'noe issledovanie napryazhenno-deformirovannogo sostoyaniya konstruktsii vysotnogo zdaniya [Experimental investigation of stress-strain state of high-rise buildings]. Vestnik MGSU. 2013. No. 10. Pp. 102–109. (rus)

11. Shcherbak G.G. Teoreticheskie osnovy gravitatsionnogo uplotneniya i formirovaniya fizikomekhanicheskikh svoistv gornykh porod [Theory of gravitational compaction and formation of physical and mechanical properties of rocks]. In: RAN. Sergievskie chteniya (Proc. Annu. Session of the RAS Scientific Council on Geoecology, Geotechnology and Hydrogeology in memory of Sergeev „Sergeev Readings‟). Moscowб 2002. No. 4. Pp. 83–88. (rus)