Frame building structure anti-seismic optimization design method considering multiple randomness

Abstract

A frame building structure anti-seismic optimization design method considering multiple randomness comprises the steps that sensitivity formulas of structure dynamic reliability to random variable distribution parameters and deterministic variables are derived respectively based on a direct probability integral method, and an efficient and accurate analysis method for dynamic reliability sensitivity is provided; a framework building structure parameter optimization design framework is constructed by taking building structure construction cost as a target function and dynamic reliability as a constraint function, and optimization problem solving is carried out based on a dynamic reliability sensitivity analysis method and a moving asymptote method provided by the invention. Compared with a traditional building structure design scheme, the method has the advantages that near-fault seismic oscillation random excitation possibly suffered by the frame building structure and randomness of parameters of the structure are considered, and the design scheme of the frame building structure considering safety and economical efficiency is provided.

Description

A Seismic Optimal Design Method for Frame Building Structures Considering Multiple Randomness technical field The present invention relates to a kind of frame building structure anti-seismic optimization design method considering multiple randomness, suitable for building The field of structural seismic design. Background technique [0002] In building structures, random uncertainties are prevalent, including due to building material properties, geometric dimensions, manufacturing Randomness of structural parameters caused by errors and material degradation, as well as ground motion and wind loads experienced by the structure during service Random incentives caused by etc. These random uncertainties have important implications for the safety, applicability, and durability of building structures. Influence, requires engineers to consider the structural reliability under uncertain factors in the process of structural design. Excellent structure Systematic methods and...

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Problems solved by technology

The traditional deterministic structural design can no longer meet the safety and economic requirements of the structure. Therefore, the present invention, under the premise of considering the random uncertainty, optimizes the frame building structure design based on the dynamic reliability, and provides theoretical reference for the building structure design.

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