A Modeling Method of Reinforced Concrete Mesoscopic 3D Model

Abstract

The invention discloses a reinforced concrete micro three dimensional model construction method. The reinforced concrete micro three dimensional model construction method comprises following steps: 1,a space multi-phase micro model and a ribbed steel bar model of reinforced concrete are constructed respectively; 2, the bonding interfaces of ribbed steel bar with concrete are defined as contact surfaces of steel bar smooth surfaces with concrete and contact surfaces of steel bar ribbed part with concrete, wherein the contact surfaces of steel bar smooth surfaces with concrete are connected using bonding units, contact pair connection is adopted by the contact surfaces of steel bar ribbed part with concrete, the bonding units and the contact pairs are adopted for connection of the space multi-phase micro model and the ribbed steel bar model of reinforced concrete, so as to form the whole model of reinforced concrete members. According to the reinforced concrete micro three dimensional model construction method, the bonding units and the contact pairs are adopted for simulation of different types of reinforced concrete bonding interface active force of different steel bar and reinforced concrete contact surface cooperation work modes, and the obtained reinforced concrete whole model is especially suitable for stimulation analysis of reinforced concrete drawing destroy process.

Description

technical field [0001] The invention discloses a modeling method, in particular to a reinforced concrete mesoscopic three-dimensional model modeling method, and belongs to the field of mechanical performance simulation of concrete materials. Background technique [0002] Reinforced concrete is a commonly used component form in engineering, and the weakening and loss of the bond between steel and concrete will pose a serious threat to structural safety. At present, there are mainly two types of methods for numerical simulation of bond-slip between reinforced concrete interfaces: the first type is to use contact analysis on the reinforced concrete interface, and generally simplify the modeling of deformed steel transverse ribs, and introduce Contact elements, and define the friction coefficient of contact, but the friction coefficient and rib height quoted in this model are all empirical values, with a lot of subjective randomness; the second type of model is to insert bonding...

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Problems solved by technology

At present, there are mainly two types of methods for numerical simulation of bond-slip between reinforced concrete interfaces: the first type is to use contact analysis on the reinforced concrete interface, and generally simplify the modeling of deformed steel transverse ribs, and introduce Contact elements, and define the friction coefficient of contact, but the friction coefficient and rib height quoted in this model are all empirical values, with a lot of subjective randomness; the second type of model is to insert bonding elements between steel bars and concrete , compared with the first type of method, the force transmission path of this model is clearer and the calculation is easy to converge. However, since the contact interface is simplified to the same bonding unit as the node, the concrete stress near the interface will deviate from the actual value. And because the steel bar is simplified as a bar unit, it cannot bear the shear force

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