INFLUENCE OF BASE SUBSTANTIAL DIFFERENTIAL SETTLEMENTS ON STRUCTURAL SYSTEMS SEISMIC STABILITY LEVEL
Keywords:base differential settlements capacity spectrum, construction system, inelastic deformations, seismic stability
Introduction: Urgent question of base substantial differential settlements influence by different origin on building structural systems seismic stability is considered in the article. The aim of research is estimate of such influence degree. Selection of analysis method: It had been suggested to use of nonlinear static analysis by the spectrum capacity method for analysis and then this method was used. Numerical estimate of base substantial differential settlements influence on structural system seismic stability: Numerical experiment which shows degree of seismic stability reduction depending of base differential settlements level is introduced. The experiment was made on the ground of wall system model of complex masonry and also reinforced concrete constructions. Nonlinear analysis was done on the consecutive influence of base differential slumping deformations and horizontal seismic loads. Consideration of the analysis results and conclusions: Consequently it was revealed, that force influence of base substantial differential settlements is able to significant reduce seismic stability of construction systems (from 1 intensity degree down to practically completely loss of seismic stability). This fact determines necessity of accounting of base substantial differential settlements and seismic force influence combination when there is capability of occurrence both of them. In this case, it is necessary to take into account sequential influence of the loads and also recommended using of nonlinear analysis by the principles of the capacity spectrum method. It is also necessary to specify level of inelastic deformations and damages evolution by experimentally confirmed values.
Instructions of projecting of non-frame residential buildings, which are built with complex of protective actions on slumping soils in seismic regions of Moldavian SSR, 1982. Kyiv, KyivZNIIEP, 43 (in Russian).
Matveev I.V., Kravchenko V.I., 1990. Combination of soil base slumping and seismic influences in analysis of buildings. Structural mechanics and building’s analysis, Moscow, Strojizdat, Vol. 4/1990, 28-32 (in Russian).
Sapozhnikov A.I., 2001. Basic foundation of construction and supply of karst-seismic stability of multistory buildings: Train aid for institutes of higher education. Astrakhan, AISI, 108 (in Russian).
Banah V.A., Banah A.V., 2006. Accounting of building strained scheme in calculated models for seismic analysis. Building constructions, Kyiv, NDIBK, Vol. 64, 132-139 (in Russian).
Kusbekova M. B., 2013. Features of object projecting in seismic regions on slumping soils. Training of engineers in the context оf XXI century global challenges: Proceedings of the International scientific-practical conference, Almaty, KazNTU named after K.I. Satpaev, Vol. IV, 27-30 (in Russian).
Scientific research and development of propositions for selection of rational designs in residential buildings, which are built in the conditions of simultaneous influence of soil base slumping and seismicity, and preparation of task for the rational designs development: Final report about scientific research, theme № 12Б/1-Е, arch. № 3403-0, 1984. Kyiv, KyivZNIIEP, 91 (in Russian).
Development of references for supply of operational reliability of operated and newly projected residential buildings of south-west microdistrict of t. Izmail, phase II, part 2: Final report about scientific research, theme № 271н/88, arch. № 4743-0, 1990. Kyiv, KyivZNIIEP, Vol. 1, 113 (in Russian).
Khokhlin D.O., 2009. Constructive protection of residential buildings of mass series used in the subsiding rock conditions in seismic areas. Dissertation Ph. D. in Engineering sciences, Candidate of Sciences in Engineering sciences: 05.23.01, Kyiv, KNUCA, 204 (In Ukrainian).
Khokhlin D.O., 2010. Residential buildings of mass series in the conditions of slumping soils in seismic areas of Ukraine. Condition of modern building science – 2010, Poltava, Poltavskij CNTJeI, 159-167 (In Ukrainian).
Banah V.A., 2013. Development of static-dynamic calculation models of buildings and structures in difficult engineer-geological conditions. Dissertation Doctor in Engineering sciences: 05.23.01, Zaporozh'e, ZSEA, 363 (in Russian).
Construction in seismic regions of Ukraine: DBN V.1.1-12:2014, 2014. Kyiv, Minrehion Ukrainy, 110. (In Ukrainian)
Anil K. Chopra, Rakesh K. Goel, 2002. A modal pushover analysis procedure for estimating seismic demands for buildings. Earthquake Engng Struct. Dyn., 561–582.
Maryenkov N.G., 2013. Experimental–theoretical methods for evaluating of earthquake resistance of building. Dissertation Doctor in Engineering sciences: 05.23.01, Kyiv, NDIBK, 352 (in Russian).
R. Hasan, L. Xu, D.E. Grierson, 2002. Push-over analysis for performance-based seismic design. Computers and Structures 80, 2483–2493.
ATC-40. Seismic Evaluation and Retrofit of Concrete Buildings – Volume 1 and 2 Applied Technology Council. Report No. SSC 96-01, Seismic Safety Commission, Redwood City, CA. – November 1996.
Paulay T., Priestley M.J.N., 1992. Seismic design of reinforced concrete and masonry buildings. New York, A Wiley Interscience Publication, 744.
Eurocode 8: Design of structures for earthquake resistance.
Repin Ju.G. et. al, 1977. Design drawings album of series 67c type design of 5 stories height residential building. Kyiv, KyivZNIIEP, series AS, 26. (in Russian).
Textbook for design of masonry and reinforced masonry constructions, 1984. Moscow, Strojizdat, 143. (in Russian)
Loads & actions: DBN V.1.2-2:2006, 2007. Kyiv, Ukrarkhbudinform: Minbud Ukrainy, 75. (in Ukrainian).
Cytovich N.A., 1983. Soil mechanics: Train aid for building institutes of higher education. Moscow, Vyssh. shk., 288 (in Russian).
Design of masonry structures. General rules: DBN V.2.6-162:2010, 2011. Kyiv, Minrehionbud Ukrainy, 94. (in Ukrainian).
Concrete and reinforsed concrete structures. General rules: DBN V.2.6-98:2009, 2011. Kyiv, Minrehionbud Ukrainy, 71. (in Ukrainian).
Klepikov S.N., 1996. Calculation of structures on deform soil base. Kyiv, NIISK, 204 (in Russian).
Poljakov S.V., Safargaliev S.M., 1988. Seismic stability of buildings with masonry bearing walls. Alma-Ata, Kazahstan, 188 (in Russian).