摘要
本文将变形与能量双重破坏指标应用到混凝土桥墩结构中,从中探讨用双重破坏指标评定桥墩在地震力作用下损坏程度的可行性。并推导了考虑轴力作用时,结构的力学模型用Clough模型的塑性杆单元刚度矩阵,同时应用直接积分法编制了相应的电算程序,以计算双重破坏指标值及结构的一系列地震反应量。通过计算结果与实验结果的比较分析,证明将该破坏指标应用到桥墩结构中是适宜的。这对旧桥加固及桥梁震后修复有重要意义。
In the theme, the deformation and energy double damage index is used on concrete pier structures and the potentiality of evaluation pier structures damage degree have been discussed. When considered the axis force effect, the elastic-plastic bar element stiffness matrix is deduced. A computer program is develeped with direct integration, so as to calculate the value of the double damage index and a number of seismic respondences of the structure. The calculation result proves it is reasonable that this damage index is utilized on pier structures by comparing with practice result. It is significant for strengthening old bridges and repairing bridges damaged.
关键词
地震荷载
钢筋混凝土
梁式桥
seismic load
reinforced concret
beam bridge
pier
damage analysis
