Bases for Standard of Analysis and Design of Base Isolation System for Buildings in Peru

Abstract eng:
A proposal of the main requirements for the analysis and design of buildings with seismic isolation in Peru is presented, with reference to the structural design codes of isolation systems ASCE/SEI 7-10 and NCh2745 (2013). We propose the design displacements calculated as a function of displacement constants obtained for the four seismic regions and different soil types, established in the Peruvian E.030 code (2016). Displacement constants according to the psuedo-accelerations for design earthquake, increased to approximate the maximum direction of seismic demand and a maximum probable earthquake with risk objective of 1% in 50 years were calculated. Subsequently, proposed the modification factors damping that estimate the spectral response of pseudo-acceleration for different degrees of damping to 5%, using a set of 14 registers (two component) base Peruvian seismic data, grouped into two soil types according to E.030 code. Finally, are presented a proposal for drift limits to design of buildings with seismic isolation in Peru. The study shows that the factor to estimate displacement of design for maximum probable earthquake is less than the value of the code ASCE SEI / 7-10 and modification factors damping tend to be an average between the values of ASCE codes SEI / 7-10 and NCh2745-2013.

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