MPA Analysis of RC Frame with Vertical Irregular Masonry Infilled Walls Considering SSI Effect
Abstract
A modal pushover analysis (MPA) method based on the soil-structure interaction(SSI) was proposed through the principle of periodic equivalence, and the feasibility of this method was verified. Taking a 10-story RC frame structure with vertical irregular filling walls as the research object, we adjust the stiffness ratio between stories and the layout position of “weak stories”,and use this method to analyze the seismic response regular pattern of this kind of structure under the condition of different sites and seismic precautionary intensity. The results indicate that: 1)In strong earthquakes, setting up “weak layer” in “the most sensitive layer of weak layer” makes the effect of weak layer more significant, and the greater the ratio of stiffness between layers,the more adverse the displacement angle between layers of RC frame structure. Irregular arrangement of filled walls in the outer floor of "sensitive area of weak layer" makes the structure form the distinct weak layer. 2)With regard to SSI effect, the deformation of RC frame structure with filled wall concentrates more obviously to the bottom floor, and the stiffness ratio between layers decreases when the structure collapses and the site soil becomes soft. Therefore,it is proposed to control the stiffness ratio between stories more strictly to ensure the ductility of such structures under earthquake effect.
Keywords: dynamic analysis(MPA), soil-structure interaction(SSA), infill wall, RC frame structure, modal pushover aralysis
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CHOPRA A K,GOEL R. A modal pushover analysis procedure for estimating seismic demands for buildings [J]. Earthquake Engineering and Structural Dynamics,2002,31:561—582.
HUANG H,YE Y X. Influence of filled wall on seismic performance of frame structure [J]. China Civil Engineering Journal,2010,43(1):156—162.(In Chinese)
LIU J. Research on seismic performance of RC frames considering SSI effects and infill wall stiffness interaction [D]. College of Civil Engineering,Hunan University,2018:12—16.(In Chinese)
TERUNA D R,MAJID T A,BUDIONO B. The use of steel damper for enhancing the seismic performance of RC frame with soft first story [J]. Journal of Civil Engineering Research,2014,4(3):191— 202.
KONSTANTINOS M,KONSTANTINOS K. The role of masonry infills on the damage response of R/C buildings subjected to seismic sequences[J]. Engineering Structures,2017,131:459—476.
HUANG L,YI H W,WANG H,et al. Experimental research on seismic of RC frames with energy conservation masonry infill walls [J]. Journal of Hunan University(Natural Sciences),2014,41(1):15— 20.(In Chinese)
GALAL K,NAIMI M. Effect of soil conditions on the response of reinforced concrete tall structures to near-fault earthquakes [J]. The Structural Design of Tall and Special Buildings,2008,17(3):541— 562.
RAJEEV P,TESFAMARIAM S. Seismic fragilities of non -ductile reinforced concrete frames with consideration of soil structure interaction [J] Soil Dynamics and Earthquake Engineering,2012,40: 78—86 [9] YUE Q X,YE L P,LU X Z. Research on the influence of soil-structure interaction [J]. Engineering Mechanics,2014,31 (3):1—6.(In Chinese)
WANG H D,SHENG W C, Seismic response of RC frame considering soil -structure interaction and gravity second -order effect [J] Earthquake Engineering and Engineering Dynamics,2016,36(3): 170—177( In Chinese)
LIN G,LUAN M T,CHEN H H. Soil structure interaction effect on the nonlinear seismic response of high -rise buildings [J]. China Civil Engineering Journal,1993,26(4):1—13.(In Chinese)
NURBAIAH M N,LAURA L,FABRIZIO M,et al. Solomon Tesfamariam. Modelling of masonry infilled RC frames subjected to cyclic loads:State of the art review and modelling with OpenSees [J]. Engineering Structures,2017,150:599—621.
MIHA T. Shear resistance of masonry walls and Eurocode 6:shear versus tensile strength of masonry [J]. Materials and Structures, 2009,42:889—907.
GB 50011—2010 Code for seismic design of buildings [S]. Beijing:China Architecture & Building Press,2010:31—47. (In Chinese)
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