设置角缝现浇钢筋混凝土框架节点楼板抗震性能研究  

Research on Anti-Seismic Performance for Reinforced Concrete Frame Joint with Slot Around

作　　者：张彦朴[1] 郝泽静[1] 单明岳[1] 葛楠[1] 

机构地区：[1]河北联合大学,河北省地震工程研究中心,河北唐山063009

出　　处：《建筑科学》2011年第9期7-11,6,共6页Building Science

基　　金：国家自然科学基金项目资助(51078124)

摘　　要：利用有限元软件ADINA对现浇钢筋混凝土框架节点做了拟静力分析。对普通梁柱节点及周围楼板设角缝节点的计算结果做了对比。结果表明,随着加载位移的增加,梁肋附近楼板钢筋应力有明显增加,说明楼板对梁的抗弯能力有增强的作用。在不影响节点承载力的条件下,楼板设角缝能局部削弱梁的抗弯能力,梁受力主筋屈服时间明显提前,梁筋屈服时柱身混凝土裂缝也有所减少,梁端与柱端塑性铰出现时间间隔加大,使节点在受到地震作用破坏时更接近梁铰机制的特点。A numerical pseudo-static model was established with ADINA software for beam-column interior joint on a reinforced concrete frame. The results for the traditional joint specified in design code and those for the joint with slot around were compared. It is shown that the stress in the reinforcement for the slab close to the beam will increase significantly with the applied top displacement in horizontal direction, but slightly for the slab far from the beam. It is also shown that for the joint with slot around, the yielding time of the beam reinforcement will shift to an earlier time, while number of cracks on column becomes less. The time interval between the occurrences of plastic hinge on beam and on the column becomes longer, which exhibits a failure type closer to the beam-hinge mode.

关 键 词：框架节点 拟静力 塑性铰 钢筋应力 柱端弯矩 

分 类 号：TU375.4[建筑科学—结构工程] TU312.1