预应力矮肋T梁受力性能研究

Study on Mechanical Behavior of Prestressed Short Rib T-Beam

摘要: 为了研究预应力矮肋T梁桥的整体抗弯性能及梁体对荷载的响应，为使其设计更加合理，本文通过梁长15.96 m，计算跨径14.96 m，梁高0.85 m，梁宽1.05 m的足尺试验，探讨普通受拉钢筋、混凝土沿截面高度的应变分布规律及梁体的破坏形态，试验结果表明：预应力矮肋T梁桥是一种整体性能较强的新型桥梁结构形式，能更好地替代空心板桥，从而广泛用于小跨径的公路桥梁中。为此类型梁桥结构的相关计算理论提供依据的同时，为今后此类桥梁的优化设计提供参考，从而保证此类桥梁在设计基准期内的安全性。

Abstract: In order to study the overall anti-flexure performance of the prestressed short-ribbed T-girder bridge and the response of the girder to loads, and to make its design more reasonable, the full-scale tests of 15.96 m long girder with 14.96 m span, 0.85 m height and 1.05 m width are car-ried out in this paper. The strain distribution law of common tension steel bar and concrete along the section height and the failure mode of the beam body will also be discussed. The test results show that the prestressed short ribbed T-beam bridge is a new type of bridge structure with strong overall performance, which can be better and replace the hollow slab bridge and is widely used in small span highway bridges. In order to ensure the safety of this kind of bridge in the design reference period, it provides a basis for the relevant calculation theory of this type of bridge structure and provides a reference for the optimization design of this kind of bridge in the future.