11. 仅受预紧力Q0作用的紧螺栓联接，其螺栓的计算应力σca，将拉应力增大30％的原因是考虑 ( ) A、安装时可能产生的偏心载荷 B、载荷可能有波动 C、拉伸和扭转的复合作用 D、螺栓材料的机械性能不稳定 - 查题网

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11. 仅受预紧力Q0作用的紧螺栓联接，其螺栓的计算应力σca，将拉应力增大30％的原因是考虑 ( )
   A、安装时可能产生的偏心载荷
   B、载荷可能有波动
   C、拉伸和扭转的复合作用
   D、螺栓材料的机械性能不稳定

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