分3个阶段10种荷载工况进行模型的力学性能试验，研究简支下承式钢桁结合梁桥的受力性能。
The mechanical property test of the model covering 3 stages under 10 load conditions is carried out to study the loading property of through truss composite beam with simple support.
设计制作一个4节间下承式桁梁结合梁模型。
A through truss composite beam model with 4 panels is designed and made.
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