Method of Plastic Hinge Joints in Design of Panel Buildings under Seismic Influence

Abstract eng:
A method is developed to estimate the reliability of precast R/C panel buildings which will be subjected to actual recorded and artificially generated earthquakes. The panel building is represented by a spatial system of plane stressed elastic structural members - wall panels and panel slabs coupled in discrete nodes by nonlinear zero length hinged connections. For consideration of ductility ground and interaction of building with the soil there is developed a complex model of soil-interface-building system containing non-inertial soil in the form of nonuniform isotropic semi-space and building, connected to each other in the zone of contact by non-elastically deformable hinge nodes. Three-dimensional nonlinear dynamic analysis of the soil-interface-building system is implemented by the finite element method in the form of substructure using an implicit time integration scheme by the computer program BUILDING-NL. There is given an example of a five story precast R/C panel building with wide spacing 7.2-8.4 m. This study has taken into account the stochastic nature of the ground motion in Tbilisi region. The calculated values of reliability parameters at different levels of peak ground acceleration indicate that the response of the building is satisfactory. The developed method and obtained results can be used in seismic risk study for new buildings of examined type under design, as well as for existing panel buildings of old generation for future seismic activity.

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