浅谈我国多层混凝土框架结构设计(6)

should be satisfied: simply supported plate, continuous sheet. Two-way plate method in accordance with the design theory of elasticity, the calculated number of cross-Chung Cheng moment is reinforced plate number of the central office, close to the board on both sides, their number can be decreased. Considering the construction, the board of both the direction of the edge strip into three. Edge of board in both directions are short for the width of the military side of length 1 / 4, the rest are middle strip. Plate in the middle belt, according to the maximum positive moment across the width obtained within the unit volume with homogeneous steel; in the edge of plate belt, press the middle plate with flat steel plate number within the half width of uniform layout.

2.5 beam and column computing results of manual adjustments to manually adjust

The frame beam reinforcement, which aims to solve the beam crack width gauge and the "strong shear weak bending" problem. mentioned that when the crack width gauge, the first consideration should be given to use large diameter steel reinforced checking of small diameter, such as the crack width is still overloaded, it should increase the beam reinforcement and concrete strength grade, or increase the beam section size, adjusted to meet the code requirements. In order to ensure "strong shear weak bending" can be the following adjustments: First, increase the appropriate end of the beam cross section; second is the appropriate end of the beam stirrups increase the diameter of the spacing encryption; third end of the beam negative moment reinforcement does not enlarge tensile steel beam under the appropriate 1.1 to 1.2 times magnification; Fourth, according to construction requirements of the span> 7m increase in the framework of bent steel beams.

Earthquake Forces, especially the prism columns and large bay, large depth of the side columns, generally in a two-way eccentric compression, while the computer program is under way in two different orientations for the calculation of eccentric compression of plane frame reinforcement. Therefore, in that the reinforcement columns should be adjusted as follows: First, choose the most unfavorable direction of the framework of the calculation can also be calculated in two directions are the direction of the reinforcement value whichever is greater, and symmetrical reinforcement; Second, unilateral control of the direction of reinforcement of at least column number of roots. Fourth, select the well shaped or diamond-shaped stirrup form columns to enhance the stirrups on the concrete constraints; 5 is due to multi-frame Computer generally not considered the basis of thermal stress and differential settlement of the problem, when the level of multi-frame size than the large and the foundation soil for the soft soil or uneven ground, it can then slightly enlarge the framework of the appropriate column reinforcement.

2.6 cycle reduction factor for access