Responses of adjacent ground and building induced by excavation using 3D decoupled simulation

抄録

This paper presents a study on excavation-induced deformation characteristics of ground and adjacent building using three-dimensional (3D) decoupled simulations. A decoupled analytical technique is proposed to enhance the consideration of both the 3D nonlinear soil behavior and the inelastic structure responses. The excavation effects and the adjacent structure’s responses are decoupled and simulated by two separate programs: PLAXIS 3D for excavation and SAP 2000 for structure. Two models are bridged by a simple iteration scheme. A well-documented excavation case history and low-rise framed building are used for demonstration. The obtained results exhibit that the decoupled analytical method is feasible to incorporate properly the 3D nonlinear soil behavior and the inelastic structure responses. It also seems practical to use since the numerical outcomes often converge within several iterations. The analytical results show that the lateral and vertical movements of the structure are significantly different from those of the greenfield ground. In addition, more in-depth inelastic structure responses can be investigated such as where the plastic hinge may occur in the structure. This is a significant advancement as it provides additional insights on assessing the building’s potential damage and serviceability.