| Because reinforced concrete irregular slab with characteristic of upper carrying capacity good capability integer prominent economy benefit and fast construction is able to adapt irregular variety of engineering structure and size aspect of structure lay, it develops rapid in engineering build of our country. Being difficult to deal with borderline condition, its accurate design and calculate is not able to realize all along .The text aiming at the circulation discusses and analyses accurate computation method of reinforced concrete regular polygon slab and reinforced concrete isosceles trapezoid slab so that acquired arithmetic, at the same time , receive preferable effect.Presently, calculation method of reinforced concrete regular polygon slab is experiential arithmetic which calculates the stress of circular reinforced concrete slab abased on the mean of sum of the radius of circumscribed circle and inscribed circle of reinforced concrete regular polygon slab. It has been verified by analyzing that error of experiential arithmetic is major and does not conform to standard of engineering design. Amendatory arithmetic introduced in the article is abased on analysis of mechanics of reinforced concrete regular polygon slab and its inscribed circular slab. After amended error from Area, we simplified reinforced concrete regular polygon slab into circular reinforced concrete slab to calculate and acquired satisfactory result.Calculation method of reinforced concrete isosceles trapezoid slab is experiential arithmetic which simplified isosceles trapezoid into rectangle slab to calculate. It has been verified by analyzing that error of experiential arithmetic is major and does not conform to standard of engineering design. Abased on experiential arithmetic, we use simplified arithmetic of perimeter fixed strut rectangle slab to calculate isosceles trapezoid slab. Afteramended error, we acquired satisfactory result. The amendatory arithmetic has high accuracy and is convenient to use and calculate.It has been verified by analyzing that the arithmetic possess characteristic of high precision , great practicability and calculation convenience ,what is more , resolved difficult problem of precision theory calculation to reinforced concrete regular polygon slab and reinforced concrete isosceles trapezoid slab. The arithmetic possess definite reference action to improve maximum moment design of reinforced concrete regular polygon slab and reinforced concrete isosceles trapezoid slab and emends criterion. |