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为研究铝合金板式节点弯剪作用下的受力特性,对足尺试件进行静力加载试验.试验测得了板式节点的荷载-位移曲线、荷载-滑移曲线以及关键位置的应变.同时对节点试件进行了有限元分析,并将试验结果与数值计算结果进行了对比.研究结果表明:加载结束后,杆件承受的最大弯矩约为其纯弯状态下强度设计值的0.88倍;试件上盖板存在明显的传递路径和高应力区,而下盖板高应力区域主要集中在与主受力杆件顶端对应的位置;各工字铝构件总体上处于弹性工作状态,且杆端剪力通过腹板分别传递至上、下翼缘后经盖板传递至其他杆件;盖板和工字铝翼缘板间产生明显的相对滑移;垂直于主受力方向的环槽铆钉受力最为不利,呈剪切受力状态,但由于不锈钢的强度较高,并未出现铆钉破坏;板式节点的有限元分析结果与试验结果吻合较好,反映了本文有限元模拟方法的可靠性.
In order to study the mechanical behavior of aluminum alloy plate joints under bending shear, the full-scale specimens were subjected to static loading test, and the load-displacement curve, load-slip curve and the key position strain of the plate joints were measured. The finite element analysis of the specimen is carried out and the experimental results are compared with the numerical results.The results show that the maximum bending moment of the bar after loading is about 0.88 times the design value of the strength under pure bending condition, The upper cover of the test piece has obvious transmission path and high stress area, while the high stress area of the lower cover mainly concentrates on the position corresponding to the top of the main force; the work piece aluminum parts are in a flexible working state as a whole, The end shear forces are respectively transmitted to the upper and lower flanges through the webs and then transmitted to the other rods through the cover plates; a clear relative slip occurs between the cover plate and the flange aluminum flange plate; ring groove rivets perpendicular to the main force direction The stress is the most unfavorable and the shear stress state, but due to the higher strength of stainless steel, there is no rivet damage; the finite element analysis results of the plate node are in good agreement with the experimental results, which reflects that the finite element method Sex.