Ductility-based seismic performance evaluation method of masonry structures under sequential earthquakes

Abstract

The invention discloses a method for evaluating the seismic performance of masonry structures based on ductility under sequential earthquakes, which comprises the following steps: S1, analyzing the ductility requirements of masonry structures under sequential earthquakes; S2, determining the seismic performance of masonry structures capacity; S3. Evaluate the seismic performance of masonry structures under sequential earthquakes. The present invention considers the influence of aftershocks, can realize the evaluation of structural response more accurately, and, on the basis of the non-iterative equivalent linearization method, obtains the sequential earthquake action according to the characteristics of the weak layer failure of multi-layer masonry structure Compared with the prior art, the method of the invention is faster and more efficient for the ductility requirements of the lower masonry structure.

Description

technical field [0001] The invention relates to the technical field of seismic performance evaluation, in particular to a method for evaluating the seismic performance of a masonry structure based on ductility under sequential earthquake action. Background technique [0002] As a structural form with a long history, masonry structure is one of the main architectural forms in our country. Masonry materials are easy to obtain, low in cost, and have good durability, fire resistance, heat insulation and thermal insulation properties. Therefore, masonry structures are still one of the building structure forms in my country at present and for a long time to come. Especially in the construction of villages and towns is widely used. However, the masonry structure is self-heavy, has low tensile and shear strength, poor ductility, and is prone to brittle failure under earthquake action. Studies have shown that under earthquakes, masonry structures suffer more serious earthquake damag...

AI Technical Summary

Problems solved by technology

Due to the relatively short time interval between the main earthquake and the aftershocks, the damaged structures after the main earthquake had no time to repair and then experienced aftershocks again, which further aggravated the damage and even collapsed.

At present, my country's existing seismic design codes and even most of the world's seismic codes mainly consider the effect of a single main shock, and have not made corresponding regulations on the risk of main and aftershock sequence earthquakes to structures. Study on the seismic performance of masonry structures under the action of

Images