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Development a Model to Estimate the Deformation of RC Members Considering the Interaction of Combined Forces

开发一个模型来估计考虑到联合力相互作用的钢筋混凝土构件的变形

基本信息

批准号：
13650647
负责人：
UEHARA Shuichi
金额：
$ 1.54万
依托单位：
Ariake National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

项目摘要

The presenting research work shows the mechanical behavior estimation of two members, reinforced concrete column and reinforced concrete beam-column connection. The method for the estimation is based on a consistent idea of plastic analysis theory considering interaction of combined forces. Though a method to predict the ductility of members with better accuracy was not proposed, some important behaviors of those members were discovered.Conclusions of RC column are as follows:1. A method to estimate shear cracking strength of column is developed considering shear span ratio, longitudinal reinforcement ratio and axial load.2. It is shown that the lateral shear capacity and the gradient of failure line can be predicted by the yield line theory considering interaction of combined forces which has been proposed by the authors.3. It is shown that the accuracy of ductility prediction by the equations of yield line theory proposed by the authors, where the effectiveness factor is reduced according to rotation angle, is as same as the one of exiting method.4. The interaction between accuracy of ductility prediction and shear span ratio is observed.Conclusions of RC interior beam-column connection are as follows:1. Sinking mechanism of failure of beam-column connection has proposed.2. It is shown by comparison with 84 specimens in literature that standard deviation of strength estimation by the sinking mechanism method is smaller than an existing method. However overestimation of strength by a little is also observed.3. Sinking of connecting beam into connection is observed when beam-column connection failed in the test. The amount of sinking is as much as the crack width of connecting beam at critical section when hoop ratio p_w, of connection is about 0.32%

本文研究了钢筋混凝土柱和钢筋混凝土梁柱连接两种构件的受力性能估计。该方法是基于塑性分析理论的一致思想，考虑了合力的相互作用。虽然没有提出一种准确预测构件延性的方法，但发现了构件的一些重要行为。钢筋混凝土柱的研究结论如下：提出了一种考虑剪跨比、纵配筋比和轴向荷载的柱抗剪开裂强度估算方法。结果表明，考虑联合作用力作用的屈服线理论可以预测边坡的侧向剪切能力和破坏线的梯度。结果表明，采用屈服线理论方程进行延性预测的精度与现有方法相同，其中有效因子随旋转角度的减小而减小。观察了延性预测精度与剪跨比之间的相互作用。钢筋混凝土内部梁柱连接的结论如下：提出了梁柱连接破坏的下沉机理。与文献中84个试件的对比表明，下沉机理法强度估计的标准差小于现有方法。然而，也有对强度估计过高的现象。试验中梁柱连接失效时，观察到连接梁向连接处下沉。当连接箍箍比p_w约为0.32%时，临界截面上的下沉量与连接梁裂缝宽度相当