Vertical pile can not only, also can be inclined to play.
不仅可以垂直打桩，也可以斜打。
The accuracy of calculation is checked by the reciprocal theorem of work, and the result of vertical pile is compared with other's.
计算的精度用功的互等定理来检查，并将直桩的结果与别人的直桩结果作比较。
On the basis of the dynamic analysis and a power-wasting theory of tenon-and-mortise work, a joint with power-wasting gap between the vertical pile and its cap is designed.
结合整体动力分析结果，根据榫卯连接减震耗能的原理，提出一种具有耗能缝隙的直桩节点设计。
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