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８０年代以来，预应力材料从冷拉Ⅱ、Ⅲ级钢筋、冷拔低碳钢丝发展到高强钢丝和钢绞线；预应力锚具相继开发了ＸＭ、ＱＭ、ＯＶＭ等体系；张拉设备逐步完善；预应力技术不断发展，形成了后张预应力成套技术、无粘结预应力成套技术等。现代预应力技术从单个构件发展到整体结...
Since the 1980s, prestressed materials have developed from cold-drawn II and III steel bars and cold drawn low-carbon steel wires to high-strength steel wires and steel strands; prestressed anchors have successively developed systems such as XM, QM, and OVM; and tensioning equipment has been gradually improved. The continuous development of prestressing technology has formed post-tensioned prestressed complete sets of technologies and unbonded prestressed complete sets of technologies. Modern prestress technology develops from individual components to overall...