The Stress Analysis And The Application To The Massive Concrete Of The Later Joint-Filled Slots

The later joint-filled slots are one of effective methods of the crack control of Massive Concrete Structure (MCS). By the means, the design of MCS without expansion joints can be realized.in this paper, three-dimension finite element solution of visco-elasticity field is deduced based on previous conclusions. Compared with the experiment data, the temperature field and the thermal stress field are discussed. The spacing, the time of sealing and the plane form of the later joint-filled slots are discussed especially, and it is found that the spacing, the time of sealing and the plane form of the later joint-filled slots are comprehensive indexes which are relevant to material, design and construction .The theory value of the spacing and the time sealing of the later joint-filled slots and some proposals on the plane form are presented on the basis of numerical calculation. Using software VTZ1CAD, the T shape model is established. The heat transfer and the restriction circumstance are simulated. The temperature-time curve and the stress-time curve are obtained. Because the later joint-filled slots are restrained strongly, in which the thermal stress is great, especially in the corner, in spite of a little temperature rise, some measures should be taken to prevent them from producing cracks. According to the latest definition of MCS, the later joint-filled slots belong to MCS. Some suggestions on construction are presented from the angle of bonding strength.The conclusions of this paper can guide the construction of the later joint-filled slots. On studying temperature and thermal stress of the later joint-filled slots, the new method is offered.