Self-centering concrete bridge piers (SCCP),which have been used to retrofit bridge piers to give better seismic response,effectively reduce residual displacements during severe earthquakes.This study gives a simplified theoretical model for self-centering concrete bridge piers including a stiffness deterioration analysis and lateral force-displacement analysis.The stiffness deterioration analysis introduces 3 damage factors for 7u,γc and 7,.These damage factors illustrate the damage caused by increasing lateral displacements.The theoretical model has been validated against existing experimental data with good agreement.

本文从业主的角度出发,探讨了火电厂施工期间(雷雨季节)的雷电安全措施。以最易遭受雷击的烟囱为例,计算分析了雷击烟囱时对施工人员和电气、电子设备的危害。最后从技术、经济、保障、气象、宣传等方面提出了21条雷电安全措施,供参考。