What does "positive" and "negative" surface mean?
回答
The "+" and "-" for the design internal forces and stresses indicate the side of the surface.
The positive side "+" is the one with the local z-axis pointing outwards.
The design internal force m-y,D+ is, for example, the governing bending moment for the reinforcement on the positive surface side.
The positive side "+" is the one with the local z-axis pointing outwards.
The design internal force m-y,D+ is, for example, the governing bending moment for the reinforcement on the positive surface side.
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结构设计与有限元分析软件（FEA）可以用于建立平面与空间结构模型，适用于由杆件、面、板、墙、折板、膜、壳、实体以及接触单元等的建模与分析计算。
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