Earthquake design techniques for Sri Lanka

Abstract

Two major factors discourage the introduction of seismic resistant design to low seismic regions like Sri Lanka. They are the cost associated with improved seismic resistance and the misconception that the area concerned is seismically inactive. On many occasions the assumption that a particular area is seismically inactive hcS been proven wrong at the cost of human life and severe destruction to the infrastructure of the area. In Sri Lanka, structural designers have not paid sufficient attention to the performance of structures in an earthquake. Hence, a number of undesirable features are found in many existing structures as highlighted. In order to adopt structures that will survive an earthquake with minimum damage at minimum extra capital cost, a detailed study has been carried out to select appropriate earthquake design techniques for Sri Lanka. The precautions that should be taken with respect to the structural form are also highlighted.