活载作用下结构挠度、应力与荷载呈线性关系，叠加原理能够适用。
The deflection and stress of the structure are linear with load under effect of live load. The superposition principle can be used.
并就弹性阶段，得到了试验梁跨中作用集中荷载时，弯曲挠度与剪切挠度之间的相对增长关系。
Furthermore, at the elastic stage, relationship between the bending deformation and shear deformation of test model under the inter-concentrated load was showed.
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