新型叠合板拼缝构造静载试验
Static Load Experiment of New Type of Laminated Plate Joint Structure

采用蛇形钢筋研究叠合板拼缝的受力性能，并且与钢筋网片进行对比分析，综合评价蛇形钢筋的抗裂性能并判断是否能取代传统的钢筋网片；进行了叠合板带两点静力加载试验研究，通过此次试验形成了新型叠合板带拼缝抗裂系列试验；通过对比荷载？材佣惹？线，分析了构件刚度变化过程和挠度发展过程，记录了裂缝出现和开展过程；分析了蛇形钢筋的受弯变形图，得出了蛇形钢筋在受弯变形后对混凝土产生的挤压力，并给出了构造措施的设计建议。结果表明：在配筋率降低的条件下，PK？？S叠合板带整体刚度较强，荷载？材佣惹？线屈服段较长，延性没有发生退化；裂缝发展缓慢，蛇形钢筋对裂缝开展有明显抑制作用，裂缝和对比组叠合板相差不多，甚至裂缝数量多于对比组叠合板，蛇形钢筋的抗裂效果优于钢筋网片；折角范围取为40°～60°，经过加工时最好在60°左右，可得出姿态良好的蛇形钢筋。
The serpentine reinforcement was used to study the mechanical properties of laminated plate joint, and was compared with the steel mesh. The crack resistance of serpentine reinforcement was determined and comprehensively evaluated whether it could replace the traditional form of steel mesh. A two-point static loading test was carried out on the laminated plate. Through the test, a series of experiments of new type of laminated plate joint crack resistance were formed. By comparing the load-deflection curves, the stiffness change process and the deflection development process were analyzed, and the occurrence and development of cracks were recorded. The bending deformation diagram of serpentine reinforcement was analyzed. The extrusion pressure of serpentine reinforcement on the concrete after bending deformation was obtained, and the design suggestion of the construction measures was given. The results show that under the condition of lower reinforcement ratio, the overall stiffness of laminated slab PK-S is strong, the yield segment of load？？deflection curve is longer, and the ductility does not degenerate. The development of cracks is slow, and the serpentine reinforcement has obvious inhibition on the development of cracks. There is not much difference between the cracks in the serpentine reinforced laminated slab and the contrast group, even the number of cracks is larger than that in the contrast group. The anti cracking effect of serpentine reinforcement is better than that of steel mesh. The angle range is 40° to 60°. After processing, it is best to reach about 60°, so that the serpentine reinforcement with good posture can be obtained