（1.青岛理工大学土木学院，266033；2.首钢工学院，北京 100041）
［提要］  通过对四种常用的预应力钢丝在高温下，考虑不同的温度应力途径时的强度试验，分析了各种预应力钢丝在20℃～800℃范围内的屈服强度、极限强度，给出了相应的计算公式，同时分析了不同温度应力途径下各种预应力钢丝的强度差异。
［关键词］  预应力钢丝  高温  强度
Experimental Investigation of Strength of Prestressed Steel Wires Under Different Temperaturestress Paths/Chen Ligang1,Gao Litang1,Yuan Jiandong2（1 Civil Department of Qingdao Technological University， Qingdao 266033, China；2 Shougang Institue of Technology，Beijing 100041, China）
Abstract:The strength of four prestressed steel wires which are commonly used in prestressed structural engineering under elevated temperature is studied. The various mechanic performances of the steel wires such as yielding strength, ultimate stress caused by temperature of prestressed steel wires of every grade ranging from 20℃ to 800℃ are analyzed. The computation equations are listed, and strength of the wires under different temperaturestress paths are compared.
Keywords:fire hazards; prestressed steel wires； elevated temperature； strength; prestressed concrete
*国家重点基础研究专项经费资助项目（2001CB409603）；国家自然科学基金重大国际合作研究项目“热力耦合作用下重大建筑火灾安全基础研究"（50320120156）。