Archive | 2021
On the Disadvantages of the NEHRP Soil Classification
Abstract
The study of the relationship of local ground conditions with the \nparameters of seismic vibrations carried out \nby the section of engineering seismology called seismic microzonation. \nIn this branch of applied science \nradical changes have taken place at the end of the last century. The Commission \non Seismic Safety of the National Institute of Building Sciences of the United \nStates has developed new recommendations, which are significantly different \nfrom all that used in the world practice of anti-seismic construction. The main \nprovisions of this NEHRP (National Earthquake Hazards Reduction Program) \nclassification adopted in many national building \ncodes, including Eurocode 8. At the same time, a number of papers appeared in \nsubsequent years criticizing the use of the NEHRP soil classification. \nThis article examines in detail and, most importantly, comprehensively the shortcomings of the NEHRP classification.