矩形RC桥墩变形能力概率模型

发布时间：2018-06-21 23:59

本文选题：RC桥墩 + 性能极限状态　；参考：《工程力学》2015年01期

【摘要】：桥墩是桥梁抗侧力体系中的关键构件。为实现基于概率和性能的桥梁抗震设计的多级性能目标,有必要给出桥墩在不同性能极限状态下的概率能力。基于已有研究工作,将RC桥墩的抗震性能水平划分为五个等级,并定义了相应的性能极限状态。采用等效集中塑性铰理论,推导并建立了各性能极限状态下RC墩柱变形能力的确定性计算公式;基于183个矩形RC墩柱试件的拟静力试验结果,通过多元回归分析,确定了各计算公式中与轴压比、长细比和配箍特征值等设计参数相关的待定系数。基于确定性计算模型和拟静力试验结果,考虑认知不确定性,建立了矩形RC墩柱变形能力的概率模型。通过实例分析,表明该模型可用于基于概率和性能的桥梁抗震设计和抗震评估。
[Abstract]:The pier is the key component in the lateral force resistance system of the bridge. In order to achieve the multi-level performance goal of seismic design based on probability and performance, it is necessary to give the probabilistic capability of pier under different performance limit states. Based on the existing research work, the seismic performance level of RC pier is divided into five grades, and the corresponding performance limit state is defined. Based on the equivalent concentrated plastic hinge theory, the deterministic formulas for calculating the deformation capacity of RC pier columns under various performance limit states are derived and established, and based on the quasi-static test results of 183 rectangular RC pier columns, the multivariate regression analysis is carried out. The undetermined coefficients related to the design parameters such as axial compression ratio, aspect ratio and hoop eigenvalue are determined. Based on the deterministic calculation model and quasi-static test results, the probability model of the deformation capacity of rectangular RC pier column is established considering the cognitive uncertainty. It is shown that the model can be used in seismic design and seismic evaluation of bridges based on probability and performance.
【作者单位】：福州大学土木工程学院;
【基金】：教育部高等学校博士学科点专项科研基金项目(20113514110003)
【分类号】：U443.22

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