基于响应面法的节段预制混凝土T型梁抗剪性能分析

Analysis of Shear Performance of Segmental PrecastConcrete T-beams Based on Response Surface Method

为研究节段预制混凝土T型梁接缝参数对其抗剪性能的影响,采用中心复合试验与有限元仿真相结合的方法,探究了节段预制拼装T型梁的键齿数量、键齿深度、梁体总长和混凝土强度这4个参数对抗剪性能的影响规律,并进行了相应的响应面回归分析。研究结果表明,运用响应面法得到了节段预制拼装T型梁各参数对其抗剪性能影响的回归方程,其预测结果与有限元仿真的实际结果吻合较好,误差在可以接受的范围内,为后续研究节省了计算成本。研究内容对同类结构桥梁的设计提供了可靠的理论依据。

In this paper,the central composite test and finite element simulation were combined to study the influence of joint parameters on the shear performance of segmental precast concrete T-beams.The influences of the number of shear keys,the depth of shear key,the total length of the beam and the strength of concrete on the shear performance of segment-precast T-beams were investigated,and the corresponding response surface regression analysis was carried out.The results show that the regression equation of the influence of the parameters on the shear performance of segmental precast T-beams are obtained by using the response surface method.The predicted results are in good agreement with the actual results of finite element simulation,and the error is within an acceptable range,which saves the computational cost for the subsequent research.The research content provides a reliable theoretical basis for the design of similar structural bridges.