摘要
通过4个1/2比例装配式钢筋混凝土柱-钢梁框架节点低周往复荷载作用下的试验研究,分析了节点区加劲腹板厚度及开孔的影响,研究该新型节点连接构造的受力性能及装配式钢筋混凝土柱-钢梁框架单元的抗震性能。基于试验结果对试件的破坏特征、滞回性能及变形组成进行分析。研究结果表明:装配式钢筋混凝土柱-钢梁框架节点滞回曲线呈纺锤形,梁端塑性铰区充分耗散能量,具有良好的抗震性能;装配式螺栓连接钢筋混凝土柱-钢梁混合节点具有良好的连接质量;加劲腹板厚度的增加一定程度上减小了节点的剪切变形,加劲腹板开孔对节点受力性能影响不大;梁弯曲变形引起的层间侧移在强柱弱梁型钢筋混凝土柱-钢梁框架节点总侧移中所占比例最大,节点剪切变形所占比例较小。
A new type of RC columns-steel beams （RCS） connection was proposed, and four half scale RCS frame subassemblies were tested under low cyclic reversed loading to study the seismic behavior of prefabricated RCS subassemblies and mechanical behavior of the new type of connection. The test parameters were stiffened web thickness and openings. Based on the test results, the failure modes, load-displacement hysteretic response and deformation components were analyzed. The experimental results indicate that all specimens show good seismic behavior with spindle-shaped load versus story drift response. The formation of plastic hinges leads to good energy dissipation capacity of specimens. It is indicated that such bolted connection between steel beam and RC column has reliable connecting quality. Shear deformation of the joint region decreases with the increasing of stiffening web thickness. No adverse effects are observed due to the existence of holes at the stiffening web. Analytical results show that deformation component due to beam plastic hinging is dominant in the total story drift components of RCS subassemblies, while shear deformation component in the joint region is small.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2012年第7期98-105,共8页
Journal of Building Structures
基金
国家自然科学基金项目(51178197
50978107)
福建省自然科学基金项目(2010J05117)
厦门市科技计划项目(3502Z20103030)
