This is a more professional problem.
Reinforcing steel bar is put much, exceed muscle namely, cause concrete possibly to be destroyed at reinforcing steel bar first, generation structure brittleness is destroyed, it is a structure be out of shape attaint is to not have bodeful paroxysmal, be breakneck.
And there is sign before comfortable muscle component is destroyed, and overload is eliminated hind, component part is out of shape can spring back, return previously condition, we call this plasticity to be out of shape.
92 years of my labour civilian build finish school of university undergraduate course, be engaged in building an industry all the time, cite the case of a personal experience. Floor construction is over, after pattern plate is demolished, the preparative build by laying bricks or stones such as brick, sanded, cement is placed to build in floor, as a result of one-time caboodle overmuch, and relatively concentration, the worker of lower level construction sees bridge is out of shape bend, bridge bottom concrete returns occurrence break. Stop the material of superstratum floor to pile up instantly, reduce the construction load of floor, the spring back on Liang Ma goes back, break cannot see basically also.
If be bridge exceeding muscle, before bridge is destroyed, won't appear of bridge be out of shape, with respect to the sign that won't discover bridge is destroyed, the meeting is possible continueing to increase construction material to pile up all the time, rupture suddenly till bridge destroy, this is breakneck.
The concrete component part that exceeds muscle so is absolutely unallowed, standard of national structure design has mandatory requirement, little muscle also does not allow, undertake controlling through limitting rate matching veins that stand out under the skin commonly.
