Method for determining internal force according to actually measured deformation of enclosure structure

Abstract

The invention provides a method for determining internal force according to actually measured deformation of an enclosure structure. The method comprises the following steps of: fitting the actually measured deformation (z, U) of the enclosure structure by using a cubic spline curve to obtain a fitting result pp1, namely a deformation curve of the enclosure structure along with depth change; calculating deformation data after depth data encryption by using pp1 to obtain (zi, Ui), and fitting the obtained (zi, Ui) by using a cubic spline curve to obtain a fitting result pp2; obtaining (zi, Qi)through one-time derivation calculation of pp2, wherein Qi is data corresponding to zi after derivation; fitting the (zi, Qi) by utilizing the cubic spline curve to obtain a fitting result pp3; obtaining (zi, Mi) through one-time derivation calculation of pp3, wherein Mi is data corresponding to zi after derivation; and substituting the obtained (zi, Mi) into an internal force and deformation relationship to calculate an internal force result. According to the method, the accurate internal force result is obtained through multi-stage fitting and derivation analysis of measured data of enclosure structure deformation, and the method has the advantages of being high in calculation precision, convenient, rapid, high in practicability and the like.

Description

Technical field[0001]The invention relates to the field of civil engineering, and in particular to a method for determining internal force based on actual measured deformation of an enclosure structure.Background technique[0002]Civil engineering foundation pit excavation, slope support, embankment support, etc. all involve enclosure engineering. During the implementation process, the deformation and internal force of the enclosure structure (enclosure pile, enclosure wall) must be monitored, and the monitoring data Judge the safety of the enclosure structure during project implementation. Inclination pipes are generally used to monitor deep displacement for the deformation of the enclosure structure. Because the inclinometer pipes are easy to bury, the impact of the construction of the enclosure structure is small, and the current displacement monitoring methods are mature and the monitoring results are relatively reliable. The internal force of the enclosure structure is generally ...

AI Technical Summary

Problems solved by technology

However, there are steel stress gauges that are easily affected by concrete pouring and other constructions during the embedding process, resulting in large dispersion of stress monitoring results and unstable change trends, and the determination of the internal force of the enclosure structure based on the stress of the steel bars is based on certain assumptions. These factors As a result, the obtained internal force of the enclosure structure cannot truly reflect the actual force state of the enclosure structure. Engineers often do not trust the stress monitoring results, and generally judge the safety of the project based on the deformation results and development trends of the enclosure structure. However, the internal force The development situation is also crucial to a comprehensive evaluation of the safety of the building envelope

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