摘要
通过对6个钢筋混凝土框架梁柱角节点在低周反复荷载作用下的试验,调查了高强度节点箍筋、双向加载等对节点强度的影响。试验结果证明,节点强度试验值为规范设计值的85%左右,设计式应导入强度降低系数。高强度箍筋对节点强度提高影响很小,在节点强度设计时可忽略不计。双向加载的节点强度只有单向加载时的80%,节点抗震设计时角节点应作为所有边节点中最不利情况考虑。楼板虽然可以提高梁的强度及刚度,但对角节点强度及最大荷载后的节点延性有不利影响。
Based on the experiment study on six reinforced concrete frame beam-column corner joints under statically cyclic loading, effects of joint high-strength lateral reinforcement and two-way loading on joint shear strength were investigated. The test results prove that the experimental value of corner joint is only about 85% of the calculated value based on concrete code, so the reduction coefficient will be inducted into the design formula. The effect of high-strength joint lateral bar on enhancing the capacity of joint strength is so small, that the effect may be neglected in the design. The joint shear strength under the two-way loading is only 80% of the strength under the one-way loading, hence corner joints in earthquake resistant design should be dealt with as the most disadvantageous parts in all exterior joints. Although the floor slab has the effects of the strength and the stiffness of beam, it has a disadvantageous influence on the joint strength and joint ductility after maximum load.
出处
《地震工程与工程振动》
CSCD
北大核心
2008年第5期115-121,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家建设部科研基金资助项目(06-K1-35)
国民委国际交流合作项目(20070308104)
关键词
框架角节点
双向加载
高强度节点箍筋
节点强度
破坏方式
frame corner joint
two-way loading
high-strength lateral reinforcement of joint
joint capacity
failure pattern
