考虑剪切变形的多梁式改进型波形钢腹板组合小箱梁桥荷载横向分布系数计算
U448.213; 目前有关钢-混组合箱梁桥的剪切变形对其荷载横向分布影响的研究较少.首先,在考虑自身剪切变形的基础上,采用正弦荷载得出刚度折减系数,并推导出了考虑剪切变形效应的偏心压力法、修正偏心压力法以及考虑剪切变形效应的刚接梁法等,用于计算多梁式波形钢腹板-钢底板-混凝土顶板(简称改进型波形钢腹板,即CSWSB)组合小箱梁桥横向荷载分布系数的方法的计算公式;然后,选取一多梁式改进型波形钢腹板组合小箱梁桥实桥进行了试验研究;最后将采用文中讨论的各计算方法计算得到的结果与有限元法结果、试验实测值进行了对比分析.结果表明:采用考虑剪切变形效应的刚接梁法得到的挠度值和Ansys模拟值更为接近,计...
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| Published in | 华南理工大学学报（自然科学版） Vol. 48; no. 7; pp. 104 - 114 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese |
| Published |
兰州交通大学 土木工程学院,甘肃 兰州,730070
01.07.2020
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-565X |
| DOI | 10.12141/j.issn.1000-565X.190885 |
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| Abstract | U448.213; 目前有关钢-混组合箱梁桥的剪切变形对其荷载横向分布影响的研究较少.首先,在考虑自身剪切变形的基础上,采用正弦荷载得出刚度折减系数,并推导出了考虑剪切变形效应的偏心压力法、修正偏心压力法以及考虑剪切变形效应的刚接梁法等,用于计算多梁式波形钢腹板-钢底板-混凝土顶板(简称改进型波形钢腹板,即CSWSB)组合小箱梁桥横向荷载分布系数的方法的计算公式;然后,选取一多梁式改进型波形钢腹板组合小箱梁桥实桥进行了试验研究;最后将采用文中讨论的各计算方法计算得到的结果与有限元法结果、试验实测值进行了对比分析.结果表明:采用考虑剪切变形效应的刚接梁法得到的挠度值和Ansys模拟值更为接近,计算跨中的荷载横向分布系数时应采用考虑剪切变形效应的刚接梁法;当桥梁结构不满足窄桥条件时,宜采用考虑剪切变形效应的刚接梁法计算跨中截面的荷载横向分布系数;当满足窄桥条件时,可以采用考虑剪切变形效应的修正偏心压力法计算横向分布系数. |
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| AbstractList | U448.213; 目前有关钢-混组合箱梁桥的剪切变形对其荷载横向分布影响的研究较少.首先,在考虑自身剪切变形的基础上,采用正弦荷载得出刚度折减系数,并推导出了考虑剪切变形效应的偏心压力法、修正偏心压力法以及考虑剪切变形效应的刚接梁法等,用于计算多梁式波形钢腹板-钢底板-混凝土顶板(简称改进型波形钢腹板,即CSWSB)组合小箱梁桥横向荷载分布系数的方法的计算公式;然后,选取一多梁式改进型波形钢腹板组合小箱梁桥实桥进行了试验研究;最后将采用文中讨论的各计算方法计算得到的结果与有限元法结果、试验实测值进行了对比分析.结果表明:采用考虑剪切变形效应的刚接梁法得到的挠度值和Ansys模拟值更为接近,计算跨中的荷载横向分布系数时应采用考虑剪切变形效应的刚接梁法;当桥梁结构不满足窄桥条件时,宜采用考虑剪切变形效应的刚接梁法计算跨中截面的荷载横向分布系数;当满足窄桥条件时,可以采用考虑剪切变形效应的修正偏心压力法计算横向分布系数. |
| Author | 刘世忠 马驰 |
| AuthorAffiliation | 兰州交通大学 土木工程学院,甘肃 兰州,730070 |
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| Author_FL | MA Chi LIU Shizhong |
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| DocumentTitle_FL | Calculation of Load Transverse Distribution Coefficient of Multi-Beam Improved Composite Small Box Girder Bridge with Corrugated Steel Webs Considering Shear Deformation |
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| Keywords | 剪切变形 刚接梁法 组合小箱梁 偏心压力法 波形钢腹板 荷载横向分布 |
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| Title | 考虑剪切变形的多梁式改进型波形钢腹板组合小箱梁桥荷载横向分布系数计算 |
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