An innovative, uniaxial ductile fiber-reinforced polymer (FRP)
fabric has been researched, developed, and manufactured (in the
ductility of the developed fabric has been investigated by strengthening and testing
eight concrete beams under flexural load. Similar beams strengthened
with currently available uniaxial carbon fiber sheets, fabrics, and
plates were also tested to compare their behavior with those
strengthened with the developed fabric. The fabric has been
designed so that it has the potential to yield simultaneously with
the steel reinforcement of strengthened beams and hence, a ductile
plateau similar to that for the nonstrengthened beams can be
achieved. The beams strengthened with the developed fabric
exhibited higher yield loads and achieved higher ductility indexes
than those strengthened with the currently available carbon fiber
strengthening systems. The developed fabric shows a more effective
contribution to the strengthening mechanism.
该文介绍了上海浦东新区南汇地区郊区水厂的原水具有高耗氧量、高氨氮、季节性变化大的特点。通过在自来水制水工艺中增添加氨装置,控制沉淀池出水氨氮为0.5 mg / L 左右;采用化合氯消毒后,可有效保证管网余氯稳定性和控制消毒副产物,但该方法也存在菌落总数检出率和色度升高及制水成本提高约0.008 元/ t 的问题