Construction method of structural yielding model of energy absorption anchor rod/anchor cable

Abstract

The invention discloses a construction method of a structural yielding model of an energy absorption anchor rod / anchor cable. The method comprises the steps of analyzing the type of an energy absorption anchor rod / anchor cable, determining the position of an axial force transmission point, simulating main stress components, deleting redundant node grid type connection, establishing node connection between the stress components, defining the attribute of the node connection, updating an action node of the node connection, judging and deleting invalid node connection, and monitoring the current yielding amount and setting the node connection attribute at the end of yielding. By means of the method, simulation of the real working performance of the yielding anchor rod under different stress states can be achieved, the yielding mechanism can be truly reflected, and the method has important significance in safety analysis of an anchor rod (cable) supporting structure.

Description

technical field [0001] The invention relates to the field of rock engineering support structure analysis, in particular to a method for constructing a structural yield model of an energy-absorbing bolt / cable. Background technique [0002] In rock engineering, such as the mining of mineral resources, the development of water energy resources, the construction of railways and roads, etc., ordinary anchors (such as threaded anchors) are generally used in combination with mortar and resin anchoring agents for surrounding rock support. The support process is simple and widely used. However, because the ordinary anchor is a very rigid anchor, when the ultimate load is reached, the amount of deformation it can provide is very small. Therefore, in large deformation rock engineering, the ordinary anchor will cause the anchor to fail due to its insufficient deformation. invalidated. With the development of the support concept and the update of the support technology, the structural ...

AI Technical Summary

Problems solved by technology

However, the existing simulation methods for energy-absorbing anchors / cables only use a linear component to perform generalized simulations on energy-absorbing anchors / cables, and do not simulate their main structural components, so they only The structural composition has been approximated, so naturally it cannot reflect the force of the internal structure, and can only approximate the axial bearing characteristics of the structural unit and reflect the support effect on the rock and soil mass on a macro level

Images