Research on longitudinal cracks of prestressed concrete box-beams

Journal of Chongqing Jiaotong University(Natural Science) ›› 2005, Vol. 24 ›› Issue (2): 8-11.

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Research on longitudinal cracks of prestressed concrete box-beams

ZHOU Zhi-xiang¹， RIEN Chao²， PENG xinguo³， FAN Liang¹

1. Chongqing Jiaotong University, Chongqing 400074, China; 2. Chongqing Expressway Development Limited Company, Chongqing 400042, China; 3. Chongqing Highway Engineering Quality Checking Centre, Chongqing 400060, China

Received:2004-06-02 Online:2005-04-15 Published:2015-05-18

预应力砼空心板桥纵向裂缝分析

周志祥¹，任超²，彭兴国³，范亮¹

1．重庆交通学院，重庆400074；2．重庆高速公路北方建设分公司，重庆400042； 3．重庆市公路工程质量检测中心，重庆4ooo6

作者简介:周志祥(1958一)，男，四川遂宁人，教授，从事桥梁及结构工程的教学及研究工作．

Abstract

Abstract: Based on the experiment of a 30m-span prestressed concrete box-beam, the longitudinal cracks along prestressed tendons are studied. It is suggested that the disadvantageous influences from both Poisson effect and opposite acting force resulting from the deformation of beams should be taken into consideration for thin-wall structures

Key words: prestressed concrete box-beams, longitudinal crack, poisson effect, opposite acting force

摘要： 依据30m跨径预应力砼足尺空心板梁的试验研究，分析了其沿预应力钢束纵向开裂的原因，提出在薄壁箱形预应力砼结构设计中，在考虑获得所需纵向预应力的同时，应计人泊松效应和预应力钢束对构件变形产生的反向作用力的不利影响

关键词: 空心板桥, 纵向裂缝, 泊松效应, 反向作用力

CLC Number:

ZHOU Zhi-xiang， RIEN Chao， PENG xinguo， FAN Liang. Research on longitudinal cracks of prestressed concrete box-beams[J]. Journal of Chongqing Jiaotong University(Natural Science), 2005, 24(2): 8-11.

周志祥，任超，彭兴国，范亮. 预应力砼空心板桥纵向裂缝分析[J]. 重庆交通大学学报（自然科学版）, 2005, 24(2): 8-11.

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Research on longitudinal cracks of prestressed concrete box-beams

预应力砼空心板桥纵向裂缝分析

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