Abstract
Numerical simulation of suspended ceiling collapse caused by ground excitation is conducted in this research. Numerical model is a suspended ceiling, in which all members are modeled by the linear Timoshenko beam elements. The Adaptively Shifted Integration (ASI) - Gauss technique, which is utilized to shift the numerical integration point adaptively to an appropriate position, is applied to the nonlinear finite element procedure for structurally discontinuous problems. Nonlinear time-history analysis shows that insufficient attachment of ceiling joist and ceiling joist receiver due to poor execution of works on clip and hanger may trigger consecutive detachment of these elements and finally, resulting in ceiling collapse.