Unbonded Posttensioned Concrete Bridge Piers. I: Monotonic and Cyclic Analyses
Unbonded Posttensioned Concrete Bridge Piers. I: Monotonic and Cyclic Analyses
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DOI：
10.1061/(asce)1084-0702(2003)8:2(92
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发表时间：
2003-03-01
影响因子：
3.6
通讯作者：
Billington, Sarah L.
中科院分区：
文献类型：
--
作者：
Kwan, Wing-Pin;Billington, Sarah L.
采用有限元分析方法研究了一种无粘结预应力混凝土桥墩体系的单调和循环性能。基于单调和循环分析的结果来评估抗震能力的程序描述在一个两级的方法考虑功能和生存性能限制的框架。一套标准来定义系统的功能和生存水平的位移能力。建议的标准是对现有标准的改进，因为它们适用于传统的钢筋混凝土结构和无粘结后张结构。给出了原型单柱桥墩和双柱排架设计的单调和循环性能。单调分析，以表征这些系统的刚度，强度，延性和极限状态行为。进行循环分析，以估计能量耗散能力，残余位移，和一般滞回性能。研究了无粘结后张程度对桥墩受力性能的影响。使用有限元结果和建议的标准，原型桥墩系统的抗震能力。
The monotonic and cyclic behavior of a proposed unbonded, posttensioned concrete bridge pier system is studied using finite-element analyses. A procedure to evaluate seismic capacities based on results from the monotonic and cyclic analyses is described in the framework of a two-level approach considering functional-and survival-performance limits. A set of criteria to define functional- and survival-level displacement capacities for the system is developed. The proposed criteria represent improvements over existing criteria in that they are applicable to both conventional reinforced concrete structures and unbonded posttensioned structures. The monotonic and cyclic behavior of prototype single-column pier and two-column bent designs is presented. Monotonic analyses are performed to characterize the stiffness, strength, ductility, and limit-state behavior of these systems. Cyclic analyses are carried out to estimate energy dissipation capacity, residual displacements, and general hysteretic behavior. The influence of the degree of unbonded posttensioning on bridge pier behavior is examined. Using the finite-element results and the proposed criteria, seismic capacities of the prototype bridge pier systems are established.