A Cracking Simulation Method for Long-age Concrete Based on Coupled Lattice Model

Abstract

The invention discloses a method for simulating cracking of long-age concrete based on a coupled lattice model. The cement paste hydration test of concrete and the long-age concrete mechanics test established a long-age concrete hydration-mechanical coupling model; the coupled lattice model was used to conduct numerical simulation experiments for long-age concrete, and the long-age concrete was obtained Mechanical properties under long-term stress state. The invention can quickly and effectively simulate and predict the evolution of the mechanical properties and the cracking process of the long-age concrete through the numerical simulation based on the coupled lattice model for the long-age concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete numerical simulation simulation research, and in particular relates to a long-age concrete cracking simulation method based on a coupled lattice model. Background technique [0002] Long-age concrete is an important material in hydraulic engineering and is widely used in concrete gravity dams and arch dams. Unlike normal concrete, the design age is 28 days, and long-age concrete usually reaches 90 to 180 days. Because the cement hydration process is relatively slow, its strength growth is also slow. Under such long-age conditions, long-age concrete structures are prone to cracking under long-term loading conditions due to slow strength growth during the long-term age. Concrete is a heterogeneous material, and the structural weak phases such as pores and microcracks will greatly weaken the strength and bearing capacity of concrete. Usually, under the long-term load condition, the holes will conne...

AI Technical Summary

Problems solved by technology

As concrete is a heterogeneous material, structural weak phases such as pores and microcracks will greatly weaken the strength and bearing capacity of concrete.

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