Seismic safety assessment of existing masonry infill structures in Nepal

被引:15
作者
Chaulagain, Hemchandra [1 ]
Rodrigues, Hugo [2 ]
Spacone, Enrico [3 ]
Varum, Humberto [4 ]
机构
[1] Univ Aveiro, Dept Civil Engn, P-3810193 Aveiro, Portugal
[2] Polytech Inst Leiria, Sch Technol & Management, RISCO, Leiria, Portugal
[3] Univ G dAnnunzio, Dept PRICOS Architettura, I-65127 Pescara, Italy
[4] Univ Porto, Fac Engn FEUP, CONSTRUCT LESE, Rua Campo Alegre 823, P-4100 Oporto, Portugal
关键词
RC buildings; non-linear analysis; masonry infill wall; seismic assessment; sensitivity analysis; CONCRETE; PERFORMANCE; EARTHQUAKE; BUILDINGS; MODEL;
D O I
10.1007/s11803-016-0320-6
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Reinforced concrete (RC) buildings in Nepal are constructed with RC frames and masonry infill panels. These structures exhibit a highly non-linear inelastic behavior resulting from the interaction between the panels and frames. This paper presents an extensive case study of existing RC buildings in Nepal. Non-linear analyses were performed on structural models of the buildings considered as a bare frame and with masonry infill, in order to evaluate the influence of infill walls on the failure mechanisms. Five three-storey buildings with different structural configurations and detailing were selected. The effect of masonry infill panels on structural response was delineated by comparing the bare-framed response with the infill response. Seismic performance is evaluated with regard to global strength, stiffness, energy dissipation, inter-storey drift, and total deflection of the structure. A parametric analysis of structures with masonry infill is also performed. For this, the influence of different material properties is studied, namely diagonal compressive stress, modulus of elasticity and tensile stress of masonry infill panels. Study results show that masonry infill increases the global strength and stiffness of the structures; it decreases the inter-storey drift and hence the total displacement of the structure. The results quantify the influence of the infill panels on structural response and, in particular, the effect of the diagonal compressive strength of the masonry wall.
引用
收藏
页码:251 / 268
页数:18
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