Global Seismic Fragility Functions for Low-Rise RC Frames with Construction Deficiencies

Table 3

Observed response and damage condition of Model-3 under significant runs.

Run (%)	Roof/1^st story displacement, inch (mm)	Roof/1^st story drift (%)	Base shear kips (kN)	Damage pattern
5	1.01 (25.65)	0.36	8.08 (35.96)	(i) It was observed that, during this run, the column ends on the ground and first level experienced flexural hair cracking.; (ii) The ground-story level longitudinal beams were also observed with vertical cracks at member ends.
30	3.66 (92.95)	1.31	18.73 (83.31)	(i) Already appeared cracks on the structural members were further enhanced and widened in flexure.; (ii) Beam-end horizontal direction crack spreading.
60	10.93 (277.60)	3.92	28.07 (124.84)	(i) It was observed that, during this exaction, the column bases experienced significant cracking and cover concrete spalling.; (ii) The beam member end at both the ground story level and also at the first story level sustained vertical and horizontal cracking.; (iii) It was observed that ground-story level joint panel regions have experienced major cracking and with concrete cover spalling and detachments at bottom levels.