[1]张峰,陆小蕊,叶见曙,等.波形钢腹板组合梁体外预应力极限应力模型试验及建议公式[J].东南大学学报(自然科学版),2018,48(5):834-842.[doi:10.3969/j.issn.1001-0505.2018.05.009] 　Zhang Feng,Lu Xiaorui,Ye Jianshu,et al.Test and formula for ultimate stress of externally prestressed tendons in corrugated steel web composite beam[J].Journal of Southeast University (Natural Science Edition),2018,48(5):834-842.[doi:10.3969/j.issn.1001-0505.2018.05.009] 点击复制 波形钢腹板组合梁体外预应力极限应力模型试验及建议公式() 分享到： var jiathis_config = { data_track_clickback: true };

48

2018年第5期

834-842

2018-09-20

文章信息/Info

Title:
Test and formula for ultimate stress of externally prestressed tendons in corrugated steel web composite beam

1山东大学岩土与结构工程研究中心, 济南 250061; 2东南大学交通学院, 南京 210096
Author(s):
1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China
2School of Transportatiton, Southeast University, Nanjing 210096, China

Keywords:

U441.5
DOI:
10.3969/j.issn.1001-0505.2018.05.009

Abstract:
To study the influencing factors and calculatation methods of the ultimate stress increment of externally prestressed tendons in corrugated steel web composite beam, the flexural tests of external prestressed corrugated steel web composite beams were carried out, and a nonlinear numerical model was established to study the influence of various parameters on the ultimate stress increment of prestressed tendons. Based on the Pannell model and parameter fitting analysis, the formula for the ultimate stress of externally prestressed tendons in corrugated steel web composite beams was proposed and compared with existing test results. The results show that the corrugated steel web box girder has good ductility. The stress increment of prestressed tendons increases linearly with the increase of the concrete strength, while decreases with the increase of the area and the strength of normal steel reinforcement in the tension zone, the initial effective stress, and the ratio of the height to the span.The ratio of the ultimate stress increment at the mid-span loading to that at the three-point loading is 0.87. The average ratio of the length of the equivalent plastic hinge length to the height of the neutral axis is 17.74.

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