The fixed end behaves as a plastic hinge, and the plastic region near the point where the concentrated load acts is developing, while that near the fixed end unloading.
固支端保持为塑性铰，集中荷载作用点附近塑性区扩展而固支端附近塑性区卸载阶段。
The fixed end behaves as a plastic hinge, and the plastic region near the point where the concentrated load acts is developing, while that near the fixed end unloading.
固支端保持为塑性铰，集中荷载作用点附近塑性区扩展而固支端附近塑性区卸载阶段。
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