| 钢筋混凝土箱型高墩双向拟静力试验研究 |
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| 引用本文： | 宗周红,陈树辉,夏樟华.钢筋混凝土箱型高墩双向拟静力试验研究[J].地震学刊,2010(4):369-374. |
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| 作者姓名： | 宗周红 陈树辉 夏樟华 |
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| 作者单位： | [1]东南大学土木工程学院,南京210096 [2]福州大学土木工程学院,福州350108 |
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| 基金项目： | 基金项目：福建省科技攻关重点项目（2009D054）资助 |
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| 摘 要： | 随着高墩大跨桥梁的广泛应用，其抗震问题也越来越突出。本文主要考虑轴压比、长细比的影响，进行了6个钢筋混凝土薄壁箱型高墩缩尺模型的双向拟静力试验，以及反复荷载作用下的非线性分析。研究表明：①钢筋混凝土薄壁箱型高墩柱在多维荷载共同作用下，主要发生典型的弯曲破坏，但剪切作用也不容忽视；②墩枉的破坏受到不同方向耦合作用的显著影响，尤其是抗弯刚度小的一侧受到的影响更大，较早就出现开裂，提前进入塑性发展阶段；③非线性有限元计算的滞回曲线、骨架曲线等与试验结果基本吻合；④建立了考虑轴压比、长细比影响的钢筋混凝土薄壁箱型高墩的双向荷载一位移恢复力模型，该模型基本能够反映钢筋混凝土薄壁箱型高墩的抗震性能，可供钢筋混凝土箱型高墩柱及高墩桥梁结构的抗震设计和动力计算参考。
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| 关 键 词： | 钢筋混凝土箱型高墩 双向拟静力试验 轴压比和长细比 非线性有限元分析 多维恢复力模型 |
Bi-axial Quasi-static Testing Research of High Hollow Reinforced Concrete Piers |
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| ZONG Zhou-hong,CHEN Shu-hui,XIA Zhang-hua.Bi-axial Quasi-static Testing Research of High Hollow Reinforced Concrete Piers[J].Journal of Seismology,2010(4):369-374. |
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| Authors: | ZONG Zhou-hong CHEN Shu-hui XIA Zhang-hua |
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| Institution: | 1. College of Civil Engineering, Southeast University, Nanjing 210096, China; 2. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China) |
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| Abstract: | While the high-pier bridges with large-span are widely used, the seismic problems of high-pier bridges become extremely prominent. In this study, bi-direetional quasi-static testing on 6 scaled models of high hollow piers was conducted, and the nonlinear finite element （FE） model was established to simulate the seismic behavior of high hollow reinforced concrete pier under bi-directional cycle loading, in which, two factors, namely axial compression ratio and slenderness ratio were considered. The main conclusions drawn from the testing and analysis are as follows： （1） The high-hollow reinforced concrete piers under the axial loading and bi-directional cycle loading mainly result in typical flexural failure and the plastic hinge occurs at the bottom of the pier. Meanwhile, the shear effect can＇t be neglected. （2） Mutual coupling occurs while the high hollow pier undertakes the bi-directional horizontal loading. The damage to the high piers may be caused under the mutual coupling effects. Especially, in the direction of to smaller rigid- ity the piers may be damaged seriously. The cracking may occur and the piers may step into the plastic stage in advance. （3） The proposed nonlinear FE model can predict the cracking and the failure of the high piers under bi-directional reversed low-cycle loading. The results from the FE model may accord well with those from the testing, such as the hysteresis characteristics and skeleton curves. （4） The proposed multi- dimensional model of load-displacement restoring force can reflect the seismic performance of reinforced concrete thin-walled high hollow piers and can be referenced in the seismic design and dynamic analysis of the high piers. |
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| Keywords: | high hollow reinforced concrete pier bi-directional pseudo-static testing axial compression ratio and slenderness ratio nonlinear finite element analysis multi-dimensional restoring forcemodel |
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