不同上部刚度对木框架剪力墙受力性能影响的试验研究  

Effect of variable upper stiffness on the performance of wood shear walls

作　　者：刘雁[1,4] Ni Chun 卢文胜[3] 吕西林[3] 周定国[4] 

机构地区：[1]扬州大学,江苏扬州225009 [2]FP Innovations Wood Product Division, Vancouver V6T 1WS, B.C., Canada [3]同济大学,上海200092 [4]南京林业大学,江苏南京210037

出　　处：《土木工程学报》2008年第11期63-70,共8页China Civil Engineering Journal

基　　金：江苏省科技厅自然科学基金(BK2007083);江苏省教育厅自然科学基金(07KJB560129);上海市科委自然科学基金(05sn07115);FP Innovations Wood Product Division资助

摘　　要：木框架剪力墙试验研究时,荷载传递梁的刚度对木框架剪力墙的破坏模式以及侧向荷载承载力有直接的影响,当木框架剪力墙墙端以及墙中洞口边未采用墙端锚栓时,这种影响更甚。当墙顶连接铰接荷载传递梁时,在水平荷载作用下,木框架剪力墙的墙端易于被上拔而与墙基础分离,此时试验所得到的木框架剪力墙的侧向荷载承载力接近于下限值;反之,刚性荷载传递梁所得到的木框架剪力墙的侧向荷载承载力接近于上限值。主要通过22片墙体的试验研究来了解上层墙体、楼盖刚度对下层木框架剪力墙受力性能的影响。其中16片为6m长2.44m高的单层足尺木框架剪力墙,墙顶一半采用铰接荷载传递梁一半采用刚性荷载传递梁,4片为足尺典型二层墙体,另外2片为增加了墙端锚栓的单层足尺木框架剪力墙。对试验结果从初始刚度、极限荷载、极限位移、能量耗散以及锚栓内力等方面进行分析,最后形成了采用刚性荷载传递梁和二层墙体均能增加墙体侧向荷载承载力的结论。In shear wall tests, a flexible load spreader that permits the ends of the shear wall to easily lift off from the foundation when a lateral in-plane load is applied will result in roughly a lower bound of the lateral load capacity of the wall. Conversely, a rigid load spreader will largely result in an upper bound of the lateral load capacity. Results are presented from a testing program designed to study the restraining effect of upper story stiffness on the performance of shear walls. Sixteen full-size single-storey shear walls, 6.0 m in length and 2.44 m in height, half with a flexible and half with a rigid load spreader, and four full-size shear walls representing a typical two-storey configuration as well as two full-size single-storey shear walls with hold-downs at the both ends were tested. Comparisons of the initial stiffness, ultimate load and displacement, energy dissipation and axial force in anchor bolts of the test walls are presented. An increase of lateral load capacity due to rigid load spreader beam and from a second storey has been confirmed.

关 键 词：木框架剪力墙 受力性能 刚度 

分 类 号：TU366.2[建筑科学—结构工程]