Abstract
Concrete structures in a sandstorm environment suffer from sandstorm erosion for a long time, which reduces the durability of concrete buildings, and then threatens the safety of buildings. Therefore, it is of great practical significance to study the aeolian sand load under the aeolian sand environment. In this paper, by numerical simulation of the sand load on the surface of bridge and simulation test of the sand load on the surface of the concrete in the sand environment, the variation law of the sand load under different sand parameters is studied. Through comparative analysis, it is concluded that the variation law of aeolian sand load in numerical simulation and test tends to be consistent with the variation of aeolian sand velocity and sand content ratio.
Highlights
The concrete structure located in a strong wind sand environment is often subjected to erosion wear of the wind sand flow, which causes the cement spallation on the surface of the concrete structure and the acceleration of the micro-crack expansion between the cement and the aggregate, reducing the durability of the concrete structure
In 2012, Li C M [3] et al studied the aeolian sand pressure of buildings in aeolian sand environment through numerical simulation software Fluent, and the results showed that the aeolian sand pressure had the greatest impact on the windward side of the building, while the aeolian sand pressure on the leeward side of the building was negative
The results showed that the influence of aeolian sand flow on building surface was much higher than that of pure wind, and the aeolian sand pressure had a positive relationship with the aeolian sand flow rate and sand content ratio
Summary
The concrete structure located in a strong wind sand environment is often subjected to erosion wear of the wind sand flow, which causes the cement spallation on the surface of the concrete structure and the acceleration of the micro-crack expansion between the cement and the aggregate, reducing the durability of the concrete structure. In 2015, Wang S Y [4] studied the influence of aeolian sand under different aeolian sand flow rates and sand content on the surface aeolian sand pressure of low buildings through wind tunnel test combined with numerical simulation. The sand flow field at different wind velocities and sand content is simulated with the Angle of attack of 90° to analyze the change of wind pressure on the windward side of the bridge. 2.1 Variation of the pressure on the windward side of the bridge at different wind sand flow rates.
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