Differential settlement producing device and method for thin-walled cylindrical shell structure test

Abstract

The invention discloses a differential settlement producing device for a thin-walled cylindrical shell structure test. The differential settlement producing device for the thin-walled cylindrical shell structure test can flexibly simulate various harmonic settlements and local settlements and practically transmit differential settlements to a thin-walled cylindrical shell model by adjusting positive and negative screw thread sleeves, thereby obtaining real shell deformation to intuitively understand the instability mode and failure mechanism of a thin-walled cylindrical shell under the differential settlements, provide bases for the economical and rational designing of structures such as vertical steel storage tanks, smooth bottom steel silos and the like, and provide reference for the drawing-up of related designing specifications. The differential settlement producing device has a simple structure and low cost, can suppose that the manufactured thin-walled cylindrical shell is free from initial stress but only has insignificant geometrical initial shortcomings, and is applied to tests and researches on the thin-walled cylindrical shells.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a non-uniform settlement generating device in a thin-walled cylindrical shell structure test, and a method for generating non-uniform settlement using the device. Background technique [0002] Thin-walled cylindrical shells are widely used in various shell structures in civil engineering, such as storage tanks, silos, masts, chimneys, and pipelines. Large cylindrical shells built on soft ground are prone to various deformations, and the uneven settlement around the shell is the most detrimental to the stability of the shell. The buckling of thin-walled cylindrical shells under non-uniform stress is currently a research hotspot in the field of shell structures in the world, but most of them focus on non-uniform loading conditions, and less research on non-uniform support problems. At present, the research on thin-walled cylindrical shells under inhomoge...

AI Technical Summary

Problems solved by technology

However, it is difficult for numerical methods to accurately consider some factors that have an important impact on the buckling of thin-walled cylindrical shells, such as initial defects, residual stress, stiffness of the storage medium, and strain hardening of the material.

The influence of these complex factors can only be investigated through experimental research or a combination of experimental and theoretical methods. However, there is no report of a non-uniform settlement generating device for thin-walled cylindrical shell structure tests.

Images