Based on the demands of two limitstates, the design control equations of cross section for prestressed concrete beam are derived and the direct design method is presented.
根据两类极限状态的基本要求，建立了预应力混凝土梁截面设计的控制方程，提出了直接设计方法。
2
It is also proved theoretically that the deduced method for fillet weld connections meets the requirements of the probabilistic limitstates design procedures.
从理论上证明角焊缝连接的折算方法满足概率极限状态设计的要求。
3
For the consideration of the fuzziness of limitstates, the method of probabilistic integral is used for the calculation of fuzzy failure probability and fuzzy random reliability index.