Nonlinear Seismic Analysis of Masonry Infilled RC Frame Structures

Abstract:

Many RC frame structures were severely damaged or collapsed in some layer. The phenomenon was significantly different from the expected failure mode in seismic design code. This paper comprehensively sums up the earthquake characteristics of masonry infilled RC frame structures. Based on an investigation of a masonry infilled RC frame structure damaged in the earthquake area, conduct the research on frail-layer caused by infill walls uneven decorated. On the hypothesis of keeping the main load-bearing component invariant, two models were considered, i. e. frame with floor slab, and frame with both floor slab and infill wall. Furthermore, divide them into groups of the bottom, the middle and the top frail-layer to discuss by changing the arrange of infill wall. Time history analyses using three-dimensional sophisticated finite element method were conducted. The major findings are: 1)infill walls may significantly alter the failure mechanism of the RC frames. 2)controlling the initial interlayers lateral stiffness ratio in a reasonable range is an effective method to avoid frail-layer damage. These findings suggest that the effects of infill wall should be considered in seismic design, keep the initial interlayers lateral stiffness ratio less than the paper suggested, and the structural elasto-plastic analysis model should take slabs and infill walls into account.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 288-294
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.288
• Online since: October 2011
• Authors: Xiao Ying Gong, Jun Wu Dai
• Keywords: Elasto-Plastic Seismic Response Analysis, Interlayers Lateral Stiffness, Masonry Infilled RC Frame Structures

References

[1] Chen Libao, Chen Mingxiang, Gao Zuop ing, etal. FEM analysis for p late effect in spatial frame of mainworkshop [ J ]. Industrial Construction, 2005, 35 ( S1) : 4202422, 431 ( in Chinese).

[2] Li Changqing, Research on dynamic model rectification of masonry infilled frame structures[D].Hunan University,2004(in Chinese).

[3] Chaker A A ,Cherifati A. Influence of masonry infill panels on the vibration and stiffness characteristics of R/C frame buildings[J]. Earthquake Engineering and Structural Dynamics ,1999,28(9):1061-1065.

DOI: 10.1002/(sici)1096-9845(199909)28:9<1061::aid-eqe856>3.0.co;2-3

[4] Liu Jianxin, L iu J ianxin. New seismic design method of Infill wall-frame structures [J]. Building Science Research of Sichuan, 1997, (2) : 29233 ( in Chinese).

[5] GB 50011—2001 Code for seismic design of buildings [ S ]. Beijing: China Architecture & Building Press, 2001 ( in Chinese).

[6] Lu Xinzheng, Ye Lieping, Miu Zhiwei. Seismic elasto - p lastic analysis theory, model, and practice on ABAQUS，MSC.MARC and SAP2000 of buildings[M]. Beijing: China Architecture & Building Press, 2009:20-21( in Chinese).

[7] Yang Junwei, Shi Chuxian. Comment based on the study of constitutive relation of masonry structure[J]. Building Science Research of Sichuan,1999.3:52-55( in Chinese).

[8] Tong Yuesheng, Qian Guofang, Liang Xingwen etc. Stiffness and application of infill brick-wall RC frame structures[J]. Journal of Xian metallurgy architectonic college,1985:51-53( in Chinese)

[9] Tong Yuesheng, Qian Guofang. Ability of deformation and load bearing of infill brick-wall RC frame structures[J]. Journal of Xian metallurgy architectonic college,1987:51-53( in Chinese).

[10] Tong Yuesheng, Qian Guofang. Practical seismic design method of infill brick-wall RC frame structures[J]. Journal of Xian metallurgy architectonic college,1987:51-53( in Chinese).

[11] MSC. Software Corporation. MSC. marc volume D: usersubroutines and special routines ( version 2005) [M ]. 2245～2249