| 强迫应变法在混凝土桥梁徐变分析中的应用 |
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| 引用本文： | 王银辉,陈山林.强迫应变法在混凝土桥梁徐变分析中的应用[J].桥梁建设,2007(1):74-77. |
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| 作者姓名： | 王银辉 陈山林 |
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| 作者单位： | 1. 重庆大学土木工程学院,重庆,400045;浙江大学宁波理工学院,浙江,宁波,315100
2. 重庆大学土木工程学院,重庆,400045 |
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| 基金项目： | 重庆市教育委员会重点项目 |
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| 摘 要： | 根据积分中值定理,利用时间段中点时间徐变系数推导了有效弹性模量计算公式,以替代传统的老化系数方法;并视徐变应变为强迫应变,推导了节段施工桥梁徐变分析的有限元方法。有限元列式直接用应力的方式给出,以适应桥梁的三维空间有限元的需要。最后通过一座逐跨施工的混凝土连续梁桥算例验证了方法的可行性。
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| 关 键 词： | 桥梁 徐变 强迫应变 有效弹性模量 有限元法 计算方法 |
| 文章编号： | 1003-4722(2007)01-0074-04 |
| 修稿时间： | 2006-10-09 |
Application of Compulsive Strain Method to Creep Analysis of Concrete Bridges |
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| WANG Yin-hui,CHEN Shan-lin.Application of Compulsive Strain Method to Creep Analysis of Concrete Bridges[J].Bridge Construction,2007(1):74-77. |
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| Authors: | WANG Yin-hui CHEN Shan-lin |
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| Institution: | 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China, 2. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China |
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| Abstract: | In accordance with the intermediate value theorem of integral,the creep coefficients of intermediate point time of incremental time segment are used to derive the formulas for effective elasticity modulus so as to substitute the formulas for the conventional creep aging co-efficient method.The creep strain is then treated as the compulsive strain and the finite element method for creep analysis of the segmental construction concrete bridges is derived.A group of the finite element formulas about creep effect analysis is expressed directly by stress in order to accommodate the need of three-dimensional finite element for the bridges.Eventually,the feasibility of the method recommended above is verified by a calculation example of a concrete continuous girder bridge constructed by span-by-span method. |
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| Keywords: | bridge creep compulsive strain effective elasticity modulus finite element method calculation method |
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