Study on the Failure Mechanism of Steel - Concrete Composite Plates under a Wheel Load and Their Applicability to Bridge Deck Slabs.

(1)钢板-混凝土组合板在静、动力(脉冲)荷载作用下的破坏机理及其设计方法[K.Sonoda，H.Kitoh，H.MASUYA]：进行了12块钢板-混凝土组合板(Robinson‘s板)在两种不同加载区域的静力加载试验，研究了螺栓布置对板的承载能力和破坏模式的影响。其次，作为一种数值方法，提出了用粗剖分来表示上述试验中观察到的破坏模式的三维刚体弹簧模型，并对其适用性进行了检验。同时还进行了钢筋混凝土梁的冲击加载试验，为研究组合结构的动力破坏机理奠定了基础。揭示了冲击荷载强度与钢筋混凝土梁破坏模式之间的关系。(2)T-…作用下组合板的破坏机理车轮跟踪的更多重复[H.Okamura，T.Horikawa和A.Kurita]：在大阪工业大学使用自动驾驶大型车轮跟踪设备测试了2个桁架型连接件的原型组合板。因此，车轮跟踪的重复次数可能与钢板的残余挠度、裂缝宽度和滑移有关。(3)钢筋混凝土加筋板的疲劳破坏机理[S.MATSUI]：在大阪大学的车轮跟踪仪上进行了7个所谓的Robinson板试件的疲劳试验。揭示了组合梁柱底部疲劳断裂的破坏机理，为制定组合板的设计方法提供了基础数据。(4)轮轨作用下连续组合梁的残余变形特性[T.TANIHIRA]：对两跨连续组合梁进行了数值模拟和试验研究。此外，对翼缘板上有一些凸起的H型钢框架与螺柱连接件的粘结性能进行了明确，以减少主梁的残余变形。较少

(1) Failure Mechanism of Steel Plate - Concrete Composite Slabs Under Static or Dynamic (Impulsive) Loading and Their Desigin Method [ K. SONODA, H. KITOH and H. MASUYA ]: The static loading tests up to failure of 12 steel plate - concrete composite slabs (Robinson's slabs) under 2 kinds of patch load having different loading areas were carried out, and it could make clear how the stud arrangement affects the load carrying capacity and the failure modes of the slabs. Next, as a numerical approach, 3 dimensional Rigid Body Spring Model employing the coarse subdivision to express the failure modes observed in the above test was proposed and examined its applicability. While the impulsive loading tests of reinforced concrete (RC) beams were also carried out as a fundamental study on the dynamic failure mechanism of the composite structures. It could reveal the relation between impulsive load intensities and the failure modes of the RC beams.(2) Failure Mechanism of Composite Slabs Under T … More he Repetition of Wheel Tracking [ H. OKAMURA, T. HORIKAWA and A. KURITA ]: 2 prototype composite slabs with truss-type connectors were tested using a self-driving large scaled wheel tracking apparatus at Osaka Institute of Technology. As a result, the repetition number of wheel tracking could be related to the residual deflection, crack widths and slip of steel plate.(3) Fatigue Failure Mechanism of RC Slabs with Stiffened Steel Plate [ S.MATSUI ]: Fatigue tests of 7 specimen of so-called Robinson's slab were carried out using a wheel tracking apparatus at Osaka University. It could reveal the failure mechanism due to fatigue breaking at the base of studs, which is worth to be fundamental data to establish the design method for the composite slabs.(4) Residual Deformation Characteristics of Continuous Composite Girder Under Wheel Tracking [ T. TANIHIRA ]: The numerical simulation and the experiment of 2-span continuous composite girders were carried out. Additionally, bond behavior of H shaped steel frame with some projections on its flange plate in cooperation with stud connector was cleared up, which was expected to decrease residual def Lection of the girders. Less