[1]易汉斌,俞 博.装配式混凝土空心板铰缝横向弯矩计算[J].长安大学学报(自然科学版),2019,39(05):88-96.
　YI Han bin,YU Bo.Calculation of transverse bending moments of shear key of assembled concrete hollow slabs[J].Journal of Chang’an University (Natural Science Edition),2019,39(05):88-96.
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装配式混凝土空心板铰缝横向弯矩计算()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第39卷
期数:
2019年05期
页码:
88-96
栏目:
桥梁与隧道工程
出版日期:
2019-09-15

文章信息/Info

Title:
Calculation of transverse bending moments of shear key of assembled concrete hollow slabs
作者:
易汉斌; 俞 博
1. 长沙理工大学 土木工程学院，湖南 长沙 410076； 2. 江西省长大桥隧研究设计院有限公司，江西 南昌 330025)
Author(s):
YI Hanbin; YU Bo
(1. School of Civil Engineering, Changsha University of Science and Technology, Changsha 410076, Hunan, China; 2. Jiangxi Longspan Bridge & Tunnel Research and Design Institute Co. Ltd., Nanchang 330025, Jiangxi, China)
关键词:
桥梁工程; 空心板; 铰缝; 正交异性板法; 横向弯矩
Keywords:
bridge engineering;  hollow slab;  shear key;  orthotropic plate method;  transverse bending moment
文献标志码:
A
摘要:
针对传统铰接板法将铰缝构造视为一个无横向抗弯刚度的铰时，无法求解铰缝的横向弯矩值，且现行规范中也无关于铰缝横向弯矩的计算方法问题，将装配式混凝土空心板结构比拟成正交异性板，利用正交异性板挠曲面微分方程，推导出对边简支矩形板横向弯矩的解析解公式，并利用MATLAB编制了相应的计算程序。以跨径10、13、16、20 m的预应力混凝土空心板为例，通过对不同跨径L和桥宽B的参数分析，探讨了空心板铰缝弯矩的分布规律。由于按照理论推导的铰缝横向弯矩求解复杂，因此根据参数分析结果，提出了铰缝横向抗弯的双折线设计计算方法。该方法在计算出跨中截面弯矩设计值的基础上，可根据建议设计曲线得到其他截面铰缝横向弯矩最大值。研究结果表明：在车辆荷载作用下，铰缝最大横向弯矩分为正弯矩和负弯矩，理论计算的方法证明，铰缝横向正弯矩效应与负弯矩效应相差不大；随着荷载从中心位置向一侧横向变化时，铰缝产生横向负弯矩且最大值出现在桥宽中心位置，同一跨径不同桥宽空心板跨中截面的横向弯矩值与其他各截面横向弯矩的比值基本一致；横向弯矩沿纵向分布的曲线与传统铰接板假设的正弦半波相差较大。提出的方法可为铰缝的抗弯设计提供理论参考。
Abstract:
Amid at the traditional articulated plate method regarded the hinge joint structure as a hinge without transverse bending stiffness, the transverse bending moment of the hinge joint cannot be solved，and there was no calculation method for the transverse bending moment of the hinge joints in existing codes. Therefore, based on the orthotropic plate method, the precast concrete hollow slab structure was compared to the orthotropic plate. The orthotropic plate deflection differential equation and an analysis of transverse bending of the rectangular plate simply supported edges of the solution formula were derived. MATLAB was used as the corresponding calculation program. Taking spans of 10, 13, 16, and 20 m of prestressed concrete hollow slabs as examples, through parametric analysis of different span L and bridge width B, the distribution regularity of the hinge moment of the hollow slab were discussed. Because the theoretical calculation of the horizontal bending moment of the joint was complicated, so according to the results of the parametric analysis, the calculation method of the doublefold design of the transverse bending of the joint was proposed. Based on the calculation of the midsection bending moment design value, the design calculation method obtains the maximum transverse bending moment of the other section joints according to the recommended design curve. The results show that the maximum lateral bending of the joint is under the vehicular load. The moment is divided into a positive and negative bending moment. The theoretical calculation method proves that the lateral positive bending moment effect of the joint seam is not much different from the negative bending moment effect. When the load laterally changes from one center position to the other side, the transverse negative bending moment of joint seam forms, and the maximum value appear at the center of the bridge width. The ratio of the transverse bending moment of the midspan section of the hollow span in the same span is the same as that of the other sections. The curve of the transverse bending moment along the longitudinal direction is difference with the sinusoidal halfwaves assumed by the traditional hinge plates. The proposed method can provide a theoretical reference for joint bending design. 4 tabs, 15 figs, 25 refs.

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更新日期/Last Update: 2019-10-16