钢管高强灌浆料翼缘-波纹腹板曲梁抗剪性能分析

为研究新型钢管高强灌浆料翼缘-波纹腹板曲梁的受剪性能，设计制作了4个缩尺试件开展新型梁的受剪性能试验。4个试件包括1个直梁和3个曲梁。试验得到了试件的失效模式、极限载荷、荷载-应变曲线和荷载-位移曲线。结果表明：在剪切荷载作用下，曲率较小的曲梁和直梁的波纹腹板失效模式基本相同；波纹腹板的稠密程度影响曲梁的失效模式。为了进一步研究新型曲梁的受剪性能，建立了有限元分析模型。基于试验测试结果，校验了有限元模型在分析试件失效过程的有效性。利用校验后的有限元模型，研究了波纹腹板厚度、曲率、波纹子平板宽度、波纹倾角、波纹深度及腹板约束条件对新型曲梁抗剪性能的影响。结果表明：曲率对新型曲梁波纹腹板抗剪屈曲性能影响较小，腹板高厚比对新型曲梁腹板的屈曲模式和受剪承载力影响较大。新型曲梁钢管高强灌浆料翼缘对腹板有较强约束并承担部分剪力。

Analysis of shear behavior for curved girders with rectangular grouted tubular flange and corrugated web

To investigate the shear behavior of a new curved girder with a rectangular grouted tubular flange and corrugated web (CG-RGTF-CW), four reduced-scale specimens, including one straight girder and three curved girders, were designed and fabricated for shear bearing capacity tests. Through these tests, data on buckling modes, ultimate loads, load-strain curves and load-displacement curves of all specimens were obtained. The test results show that the corrugated webs of both the curved girder with small curvature and the straight girder exhibited similar failure modes. Interestingly, the density of the corrugated web influenced the buckling mode of the curved girder. To further investigate the shear behavior of these new girders, a finite element (FE) model was constructed. The reliability of the FE model was verified using experimental results. Using the presented FE model, the effects of several parameters on shear behavior were examined. These parameters included corrugated web thickness, girder curvature, folded sub-plate width, corrugation angle, depth of inclined fold and web constraints. The results show that girder curvature has minimal effect on the shear buckling performance of the corrugated web, while the web height-to-thickness ratio has remarkable influence on the buckling modes of the corrugated web and the shear bearing capacity of the new girder. Additionally, the rectangular grouted tubular flange exhibited robust web restraint capabilities, contributing to shared shear force absorption with the web.