(3 ) this thesis deduces the predigestion calculating method for calculating the section stress redistributed by the effects of concrete shrinkage, creep and difference temperature of pre-stressed lager cantilever composite beam with corrugated steel webs (3)推导了预应力波形钢腹板组合挑梁关于徐变、收缩及温度效应下的截面应力分布简化计算方法。
the bigger no . 5 6 high pressure heater's difference temperature is another factor . the paper detaily analysed the reasons that turbine's relative intra-efficiency and condenser's vacuum lowering and no . 5, 6 high pressure heater's difference temperature rising . it using the thermal system equal quantity analysis method, calculated the value that turbine unit thermal efficiency had been lowered 论文中对汽轮机相对内效率低、凝汽器真空低于设计值以及#5、6高压加热器上、下端差大于设计值的原因进行了详细的分析,并将各因素对整个热力系统效率降低的影响程度进行了定量的分析和计算。
the bigger no . 5 6 high pressure heater's difference temperature is another factor . the paper detaily analysed the reasons that turbine's relative intra-efficiency and condenser's vacuum lowering and no . 5, 6 high pressure heater's difference temperature rising . it using the thermal system equal quantity analysis method, calculated the value that turbine unit thermal efficiency had been lowered 论文中对汽轮机相对内效率低、凝汽器真空低于设计值以及#5、6高压加热器上、下端差大于设计值的原因进行了详细的分析,并将各因素对整个热力系统效率降低的影响程度进行了定量的分析和计算。
through the theoretical calculation and parameter analysis and compared the result with general composite beam, the results show that the section stress redistributed by the effects of concrete shrinkage and creep and tensile stress by difference temperature will be greatly reduced . the forcing characteristic of this 通过理论计算和有限元参数分析,与常规组合结构进行对比,验证了预应力波形腹板组合结构具有大大减小徐变引起的应力重分布及温差和收缩效应在混凝土板产生的拉应力值、对加载龄期和持荷龄期不敏感的特点,结构受力性能非常优越。