Development of Rational Design Method for Composite Structures with Steel Plates and Concrete

(1)通过对港工沉箱中扶壁的加载试验，阐明了组合式扶壁的极限承载力略大于钢筋混凝土扶壁的极限承载力，发生了混凝土的压缩破坏和钢板的剪切屈服破坏，实测承载力大于JSCE规范中深梁计算公式的预测值。(2)钢筋混凝土和复合材料支墩的纯扭试验结果表明，两种支墩的屈服扭矩相同，复合材料支墩屈服后扭矩增大，可采用Hsu提出的扩展分析方法进行预测。(3)对夹层结构受剪承载力的试验和分析表明，无论是桁架模型还是超静定桁架模型，都能较好地评价仅设置横隔梁和设置全腹板和横隔梁两种情况下的受剪承载力。的情况下 ...更多信息 在只设置全腹板的情况下，对受压区、斜裂缝区、受剪钢筋板和翼缘板在受压和受拉时所承担的剪力分量进行了深入的研究。(4)通过抗剪连接件变形试验和压花钢板粘结试验，建立了抗剪连接件变形的力学模型，提出了抗剪力传递强度的计算模型。(5)采用RBSM对混凝土中预埋钢锚板的破坏进行了分析，可以较好地预测其开裂。(6)通过空心夹层板的冲切试验，发现空心夹层板的冲切承载力比相同配筋率的钢筋混凝土板的冲切承载力低30%左右。(7)通过钢套加固钢筋混凝土柱的低周反复荷载试验，研究了钢套数量对柱延性和剪力分量随变形变化的影响。(8)针对自密实混凝土，提出了合理的砂浆配合比设计和总量现场试验，阐明了增粘剂对新拌混凝土水化性能的影响。少

(1) From loading tests of buttresses in caissons for harbor it was clarified that ultimate capacities of composite buttresses are slightly greater than those of reinforced concrete (RC) buttresses, that compression failure of concrete and shear failure with yielding of steel plates take place, and that the observed capacities are greater than those predicted by the equation for deep beams in JSCE specification.(2) It was indicated by pure torsion tests of RC and composite buttresses that the yielding torsional moments are the same for both types, that the torsional moment increases after yielding in the case of composite buttress, and that the expanded analytical method by Hsu can be applied for prediction.(3) The experiment and analysis for shear capacities of sandwich members indicate that either truss model or statically indeterministic truss model evaluate the shear capacity in both cases in which only diaphragm is placed and in which full web and diaphragm are placed. In the case … More in which only full web is located, the through investigation on shear force components carried by compression zone, diagonal cracking zone, shear reinforcing steel plate and flange plates in compression and tension was conducted.(4) Establishment of a mechanical model on deformation of shear connector and proposal for calculation model of shear force transfer strength were made by conducting experiments on deformation of shear connector and bond of embossed steel plate, respectively.(5) The analysis on failure of steel anchor plate embedded in concrete was done by RBSM,which could predict cracking properly.(6) It was disclosed in the punching shear test of open sandwich slabs that the punching shear capacities are less by 30% than those of RC slabs with the same reinforcement ratio.(7) Effects of amount of steel jacket on ductility and variation of shear force components with deformation were clarified by the reversed cyclic loading test of RC columns retrofitted with steel jacket.(8) For self-compacting a concrete rational mix design for mortar and a cite test for total amount were proposed and the role of viscosity agent on compactability of fresh concrete was clarified. Less