球墨铸铁预应力传递装置受压性能试验研究
Experimental Study on Compression Performance of Ductile Iron Prestressing Transfer Device

针对一种新型的全长压力型后张预应力抗浮锚杆，设计制作了4种不同型号的球墨铸铁预应力传递装置。为了研究该装置在预应力钢绞线张拉过程中的受压性能，对各型号的铸铁装置开展了受压性能试验，并采用ABAQUS有限元软件对铸铁装置的受压性能试验做了数值模拟研究。结果表明：在预应力张拉条件下，各型号铸铁装置的受压破坏形式相同，均表现为局部失稳破坏，且失稳破坏发生位于肢件1/2H₀处；各型号铸铁装置的极限承载力超过其设计承载力，能满足钢绞线张拉需求；增大铸铁装置截面尺寸能够显著提高其极限承载力，其中肢件未加腋的铸铁装置HM27相较于HM18提高了约18%，而肢件加腋的铸铁装置HM45比HM36提升了约27%。
For a new type of full-length pressure-type post-tensioned prestressing anti-floating anchor, four different types of ductile iron prestressing transfer devices were designed and fabricated. In order to study the pressure performance of the device in the process of prestressing strand tensioning, the pressure performance test was carried out on each type of cast iron device, and numerical simulation was done on the pressure performance test of the cast iron device using ABAQUS finite element software. The results show that: under the condition of prestressing tension, the compression damage of each type of cast iron device is in the same form, all of them show local instability damage, and the instability damage occurs in the limb 1/2H₀; the ultimate bearing capacity of each type of cast iron device exceeds its design bearing capacity, and it can meet the demand of strand tensioning; increasing the cross-section size of the cast iron device can significantly improve its ultimate bearing capacity, in which the limb without axil cast iron device HM27 can significantly improve its ultimate bearing capacity compared with the HM27, and the limb without axil cast iron device can significantly improve its ultimate bearing capacity, and the limb without axil cast iron device HM27 can significantly improve the ultimate bearing capacity. HM27 increased by about 18% compared to HM18, while the cast iron device with armpit limbs HM45 increased by about 27% compared to HM36.