无粘结碳纤维筋预应力混凝土连续梁受力性能试验与分析  

EXPERIMENT AND ANALYSIS OF PLASTIC PERFORMANCE OF PARTIALLY PRESTRESSED CONCRETE CONTINUOUS BEAMS WITH CFRP TENDON

作　　者：程东辉[1] 贾莹[1] 刑剑兵[1] 

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《工业建筑》2010年第3期37-43,共7页Industrial Construction

基　　金：黑龙江省自然科学基金项目(E200732);哈尔滨市重点科技攻关项目(2005AACG009)

摘　　要：为解决CFRP筋张拉与锚固,探索一种CFRP筋的锚固方法,对9根无粘结CFRP筋部分预应力混凝土连续梁进行三分点的静载试验。试验证明这种锚固方法是可行的。基于试验数据,重点开展中支座负弯矩钢筋屈服后,这类梁的CFRP筋应力及塑性铰区域分布特征、内力重分布等方面的研究。在此基础上,提出无粘结CFRP筋部分预应力混凝土连续梁等效塑性铰长度的估算公式和弯矩调幅的计算公式。Nine continuous concrete beams reinforced with unbonded CFRP tendon were fabricated. Static load tests were carried out for these beams. A new method for CFRP tendon was presented before test to explore the anchorage method of CFRP tendon,whose feasibility was verified through test. Based on test data,it was studied stress of CFRP tendon,distribution of zone of plastic hinge,redistribution of internal force and so on. Then the calculation formula of length of equivalent plastic hinge and that of moment modification were presented respectively.

关 键 词：无粘结预应力CFRP筋 连续梁 塑性铰 内力重分布 

分 类 号：TU378.2[建筑科学—结构工程]