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Building structures are subjected to vibrations due to earthquake activity. There are many characteristics that induce irregularities in buildings. Apart from other reasons, these irregularities may be; many times; due to non-uniform distribution of mass, stiffness, or strength in the structure of the building. Due to such irregularities; buildings are subjected to some undesirable effects which make them weaker compared to regular buildings. Indian Standard code of practice IS 1893 – (Part 1): 2016 [1] details guidelines to be followed so that buildings are less and less irregular. Many times such guidelines may be the result of past studies of actual performances of buildings in seismic events. It is the intended purpose of this paper to bring a review of standard guidelines which are important for irregular buildings for preventing various typical damages to occur in seismic conditions. Typical examples of past damages have been provided to draw lessons.

Cement concrete is the most important construction material which is non-homogeneous in nature. Its strength depends on properties of its many constituent materials are diverse in nature. It is important to fix up exact proportions of these materials beforehand so that needed strength in concrete is obtained later on. Sufficient time is needed to check it by making trial mixes of concrete after fixing up the proportions by theoretical calculations and testing these trial mixes after 28 days. In this duration concreting work may be held up in the absence of a final approved mix in terms of quantities of various constituents of concrete. Use of artificial neural networks (ANNs) for the checking of design composition of fly ash blended cement concrete mixes which were designed as per Indian standard guidelines has been made. Prediction of strength of such mixes at a later date by ANN has also been explored in this study. Prediction results of ANNs come close to experimental values and reinforce the utility of ANNs in the area of use of civil engineering materials for improving efficiency in construction

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