PRINCIPLE OFLIMIT STATE DESIGN
PRINCIPLE OFLIMIT STATE DESIGN Design Requirements 1. Structure should remain fit with adequate reliability during its lifetime. 2. Should have adequate durability under normal maintenance. 3. Should not suffer overall damage or collapse disproportionately under accidents. To achieve all the above it is not enough if the members are designed to take the expected internal forces for load transfer. It is necessary that all structural elements are suitably connected and anchored. Limit States * The major categories of limit states are limit state of strength and limit state of serviceability. * Characteristic actions It is defined as the values of different actions which are not expected to be exceeded with more than 5 per cent probability, during the life of the structure. In the absence of statistical analysis, the loads presented in IS 875 and other codes may be considered as characteristic actions. * Design Actions (Loads) To take care of uncertainties involved in analysis, design and...