Earthquake Resistant Design&Construction Provisions for Reinforced Concrete Structure

Seismic design concept of a structure in many ways different because of the uncertainty of the earthquake loading and its behavior. Therefore, a limited damage is permitted without allowing the collapse of the structure when subjected to the most severe earthquake predictable at the site thus ensuring safety of lives and its utility. Accepting the opportunity of damage, on the basis that it is less luxurious to repair when hit by an earthquake rather than making the structure earthquake damage resistant. This thought results in a reasonable design, which will be vulnerable to earthquake damage but will not collapse in an event of severe earthquake. These design criteria are also based on deliberations of allowable stresses, permissible inflexible strain, anticipated factor of safety against collapse, acceptable damage etc. Intelligent framing system, careful design& construction detail can vastly improve the performance of structure to resist earthquake. For very important structures/projects such as nuclear power plants, high dams, high rise buildings, long span bridges, etc.& their high cost requires high degree of safety than the ordinary structures& therefore requires special design criteria. The major developments in basics philosophy& principles of seismic design, development of normalized shape of response spectra and its application, design for strength& ductility, developments in 2D/3D mathematical models and their behavior, soil-structure interaction and dynamic analysis, reinforcement detailing, integrity and continuity of structure, properties of material, energy dissipating devices, Regular mass and stiffness distribution, increasing the plastic deformation capacity and good quality construction and workmanship. This review is presenting the future trends in earthquake resist design features in RCC structure.