Influence of Masonry Infill on Seismic Design Factors of Reinforced-Concrete Buildings

Table 5

Comparison of seismic design factors for all structural models.

Frame system	Ductility reduction factor (Rd)			Response reduction factor (R)			Ductility (μ)			Overstrength factor (RO)			Deflection amplification factor			Deflection factor
	Compressive strength of infill (MPa)			Compressive strength of infill (MPa)			Compressive strength of infill (MPa)			Compressive strength of infill (MPa)			Compressive strength of infill (MPa)			Compressive strength of infill (MPa)
	5	4	3	5	4	3	5	4	3	5	4	3	5	4	3	5	4	3
Full RC infilled frame in X axis	1.15	1.13	1.15	5.86	5.36	5.16	1.16	1.14	1.17	10.19	9.5	8.98	11.82	10.83	10.50	1.01	1.01	1.02
Full RC infilled frame in Y axis	1.15	1.13	1.15	5.86	5.48	5.17	1.16	1.14	1.17	10.20	9.7	9.0	11.83	11.05	10.53	1.01	1.01	1.02
Corner infill at ground story RC infilled frame in X axis	1.80	1.90	1.32	4.27	4.26	2.93	2.12	2.31	1.37	4.75	4.49	4.45	10.07	10.37	6.09	1.18	1.22	1.04
Corner infill at ground story RC infilled frame in Y axis	1.80	1.28	1.30	4.27	3.05	2.94	2.13	1.32	1.34	4.75	4.77	4.53	10.11	6.29	6.07	1.18	1.03	1.03
Open ground story RC infilled frame in X axis	1.79	1.64	1.75	1.94	1.78	1.89	1.94	1.85	1.75	2.17	2.17	2.17	4.20	4.01	3.79	1.08	1.13	1.00
Open ground story RC infilled frame in Y axis	1.71	1.65	1.89	1.85	1.78	2.04	1.97	1.87	1.89	2.16	2.16	2.16	4.25	4.03	4.08	1.15	1.13	1.00
Bare frame in X axis	1.64	1.64	1.64	1.43	1.43	1.43	1.64	1.64	1.64	1.75	1.75	1.75	2.87	2.87	2.87	1.00	1.00	1.00
Bare frame in Y axis	1.63	1.63	1.63	1.43	1.43	1.43	1.63	1.63	1.63	1.76	1.76	1.76	2.86	2.86	2.86	1.00	1.00	1.00