基于转动刚体模型筋混凝土挡块抗震强度预测

徐略勤; 李建中

doi:10.6052/j.issn.1000-4750.2013.04.0381

基于转动刚体模型筋混凝土挡块抗震强度预测

徐略勤^{1, 2,},
李建中²

1.
重庆交通大学山区桥梁与隧道工程国家重点实验室培育基地,重庆 400074;
2.
同济大学土木工程防灾国家重点实验室,上海 200092

基金项目: 交通运输部西部交通建设科技项目(200831800098); 国家973计划研究专项课题项目(2012CB723305); 交通运输部应用基础研究项目; (2014319814210)

详细信息

作者简介:
李建中(1963-),男,湖北人,教授,博士,博导,副院长,长期从事桥梁抗震研究(E-mail:lijianzh@tongji.edu.cn).

通讯作者:
徐略勤(1983-),男,江西人,讲师,博士,主要从事桥梁抗震理论与设计研究(E-mail:xulueqin@163.com).

中图分类号: U442.5⁺5
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- 文章访问数: 298
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出版历程
- 收稿日期: 2013-04-27
- 修回日期: 2013-11-26
- 刊出日期: 2014-10-24

SEISMIC STRENGTH PREDICTION OF REINFORCED CONCRETE RETAINERS BASED ON RIGID BODY ROTATION MODEL

XU Lue-qin^{1, 2,},
LI Jian-zhong²

1.
State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
2.
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 在拟静力试验基础上,根据挡块的破坏现象、钢筋的应变分布规律、以及挡块的力-变形关系曲线识别了挡块的两种典型破坏形态,即斜截面剪切破坏和连接面剪切破坏。引入转动刚体的假设模拟挡块的破坏机制,提出混凝土和钢筋强度贡献的两个独立分项,分别建立了两种破坏形态下挡块的抗震强度预测模型。两个模型本质上一致,但受力模式有别。斜截面转动刚体模型中挡块的强度主要来自混凝土、剪切钢筋、水平拉筋和水平构造筋的贡献;而连接面转动刚体模型主要来自混凝土和剪切钢筋。两个模型不仅可体现挡块尺寸、材料特性、钢筋数量等基本参数的影响,也可反映加载位置、钢筋位置等因素的作用。误差分析表明两个模型计算结果精确、可靠,可为挡块的抗震设计计算提供参考。
- 桥梁 /
- 转动刚体模型 /
- 拟静力试验 /
- 钢筋混凝土挡块 /
- 抗震强度
Abstract: Based on the damage phenomena, steel strain distribution, and force-deformation relationships observed during quasi-static experiments on reinforced concrete retainers, two typical failure patterns are identified; diagonal shear failure and horizontal shear failure. The rigid body rotation hypothesis is introduced to model the failure mechanism of the retainers, and dual independent strength contribution terms are suggested to represent the contributions from concrete and reinforcements. Two strength analytical models are established corresponding to the aforementioned two failure patterns. The two models are essentially the same but with distinct force diagrams. In the diagonal rigid body rotation model, the retainer strength comes from concrete, shear steel, horizontal tension steel, and horizontal side steel, whereas in the horizontal rigid body rotation model, the retainer strength comes from concrete and shear steel. In both models, basic parameters such as retainer size, material properties, and reinforcement amount are formulated, and the effects of loading position and reinforcement location are also taken into consideration. Error analysis shows that the two models give accurate and reliable predictions, which can provide practical reference for seismic design of retainers.
- bridge /
- rigid body rotation model /
- quasi-static tests /
- reinforced concrete retainer /
- seismic strength

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参考文献(12)

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文章访问数: 298
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基于转动刚体模型筋混凝土挡块抗震强度预测

作者简介: 李建中(1963-),男,湖北人,教授,博士,博导,副院长,长期从事桥梁抗震研究(E-mail:lijianzh@tongji.edu.cn).

通讯作者: 徐略勤(1983-),男,江西人,讲师,博士,主要从事桥梁抗震理论与设计研究(E-mail:xulueqin@163.com).

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出版历程

SEISMIC STRENGTH PREDICTION OF REINFORCED CONCRETE RETAINERS BASED ON RIGID BODY ROTATION MODEL

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出版历程

目录

作者简介:
李建中(1963-),男,湖北人,教授,博士,博导,副院长,长期从事桥梁抗震研究(E-mail:lijianzh@tongji.edu.cn).

通讯作者:
徐略勤(1983-),男,江西人,讲师,博士,主要从事桥梁抗震理论与设计研究(E-mail:xulueqin@163.com).