人们通过研究发现，这种用高强螺栓连接的节点具有明显的非线性特征，介于刚接和铰接之间。
We discover through research that these joints connected by high strength bolts have obvious nonlinearity which intervene the rigid joints and the hinge joints.
设计顶部弦杆时，应在跨距中间有一临时螺栓铰接。
The top chords will be designed with a temporary bolted splice at mid-span.
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