[1]张天航,张建勋,万二帅.大节段装配式波形钢腹板组合T梁横向分布系数研究[J].郑州大学学报(工学版),2021,42(06):107-112.
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大节段装配式波形钢腹板组合T梁横向分布系数研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42
期数:
2021年06期
页码:
107-112
栏目:
出版日期:
2021-11-10

文章信息/Info

Title:
Analysis and Research of the Lateral Distribution Factors of Large-segment Prefabricated T-Girder with Corrugated Steel Webs
作者:
张天航张建勋万二帅
文献标志码:
A
摘要:
为探索新型结构波形钢腹板组合T梁桥的荷载横向分布情况,针对跨径60米的大节段装配式波形钢腹板组合T梁桥进行工程设计,基于ANSYS建立有限元模型,研究了横隔板构造形式及间隔变化对荷载横向分布的影响,确定了横隔板最优布置方式,并将有限元法与传统横向分布计算方法进行了对比。结果表明,X型钢桁架横隔板与V型钢桁架横隔板刚度相差很小,且前者略高于后者,钢板式横隔板改善荷载横向分布最明显;对于边梁,三种构造形式下荷载横向分布系数相比无横隔板时下降都不足1%,中梁的荷载横向分布系数相比无横隔板时最大降低了3.2%。X型钢桁架作用下的边梁荷载横向分布系数略优于V型钢桁架作用下的荷载横向分布系数,而中梁与之相反。相同构造形式下横隔板的间隔变化对荷载横向分布影响线的影响很小。传统横向分布计算方法与有限元法作比较可得刚接梁法最接近于有限元法,对于边梁横向分布系数与有限元法相差约为6.92%,对于中梁与有限元法相差约为1.22%。
Abstract:
In order to explore the load lateral distribution of the new structure composite T-girder bridge with corrugated steel web, a 60-meter-span large-segment prefabricated composite T-girder bridge with corrugated steel web was used for engineering design. A finite element model was established ba<x>sed on ANSYS. The influence of the structural forms and interval of the diaphragm on the lateral load distribution was studied, the optimal layout of the diaphragm was determined, and compared the finite element method with the traditional lateral distribution calculation methods. The results show that, the stiffness difference between the X-shaped steel truss diaphragm and the V-shaped steel truss diaphragm is small, and the former is slightly higher than the latter. The steel plate type diaphragm improves the load lateral distribution most obviously for the side beam, the load lateral distribution coefficient under the three structural forms is less than 1% lower than that without the diaphragm, and the load lateral distribution coefficient of the center beam is reduced by 3.2% at the maximum compared with the case without the diaphragm. The lateral load distribution factor of the side beam under the action of the X-shaped steel truss is slightly better than the lateral load distribution factor under the action of the V-shaped steel truss, while the center beam is the opposite. The change of the interval of the diaphragm under the same structure has little effect on the influence line of the load lateral distribution. The changes in the number of steel truss and steel plate diaphragms have little effect on the load lateral distribution influence line. Comparing the traditional lateral distribution calculation methods with the finite element method, the rigid connected beam method is closest to the finite element method. The difference between the lateral distribution factor of the side girder and the finite element method is about 6.92%, and the difference between the middle girder and the finite element method is about 1.22%.
更新日期/Last Update: 2021-12-17