无粘结碳纤维筋预应力连续梁板弯矩调幅研究  

Research on Moment Modification for Continuous Beams and Slabs Prestressed with Unbonded CFRP Tendons

作　　者：白崇喜[1] 张博一[2] 侯晓萌[2] 

机构地区：[1]东北农业大学水利与建筑学院,哈尔滨150030 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《科学技术与工程》2013年第8期2270-2276,共7页Science Technology and Engineering

基　　金：黑龙江省教育厅科学技术研究项目(12521007)资助

摘　　要：无粘结CFRP筋部分预应力混凝土连续梁板因配有一定数量的非预应力有粘结钢筋,其在整个加荷过程中存在一定的塑性内力重分布现象。利用无粘结CFRP筋部分预应力混凝土连续梁板全过程分析程序,考察中支座控制截面综合配筋指标、跨中控制截面综合配筋指标、预应力度、加载方式、跨高比及CFRP筋弹性模量等参数对该类连续梁板弯矩调幅的影响规律。基于仿真分析结果,建立了该类连续梁板弯矩调幅系数计算公式,可以此为依据进行连续梁板的塑性设计。Concrete continuous beams and slabs partially prestressed with unbonded CFRP tendons still have the plastic redistribution process of internal force because of non-prestressing bonded reinforcements for all loading stage. Based on the results of full-range analysis programs of concrete continuous beams and slabs partially prestressed with unbonded CFRP tendons, the basic factors such as combined reinforcement index of intermediate support section, combined reinforcement index of mid-span section, prestressing degree, loading type, ratio of span to depth and modulus of elasticity for CFRP tendon affecting moment modification of this kind of continuous beams and slabs. Based on the results of simulations analysis, the calculation formulas of moment modification coefficient in continuous beams and continuous slabs are proposed, and they can provide references for plastic design of this kind of continuous beams and slabs.

关 键 词：预应力混凝土 连续梁板 无粘结CFRP筋 弯矩调幅 

分 类 号：TU377.9[建筑科学—结构工程]