预应力混凝土框架边节点抗震性能试验
|
摘要
预应力混凝土框架结构在地震作用下的反应与普通钢筋混凝土结构相比存在着差异,且受力复杂,难以通过理论分析得到其抗震性能.结合实际工程,通过框架节点试验模型在低周反复加载作用下的拟静力试验,研究了后张有粘结预应力混凝土框架边节点的破坏形态、滞回特性、骨架曲线、刚度退化、破坏时应变等.研究结果表明:水平地震作用下有粘结预应力混凝土框架边节点模型的位移滞回曲线由梭形变化到反S形,存在捏拢现象;位移延性系数能达到4.0以上,耗能能力较强,结构具有较好的抗震性能;建议通过加大柱截面和增强柱端抗剪钢筋来实现强剪弱弯.
Compared to reinforced concrete structures,the seismic response of prestressed concrete structures is more complicated and the seismic performance could hardly be obtained by theoretical analysis.Based on a practical engineering,an experimental study is conducted on aseismic performance of post-tensioned bonded concrete exterior joint with strong beam-weak column subjected to reversed cyclic load.The failure pattern,hysteresis properties,skeleton curve,stiffness deterioration and failure strain etc.of the prestressed joint are studied.The results indicate that the displacement hysteretic loops of the bonded prestressed concrete frame exterior joint under the horizontal earthquake vary from shuttle to reversed-s shape with pinch;the ductility factor of this type of structures is larger than 4.0;and the dissipative capability is moderate.The aseismic performance of the prestressed exterior joint is satisfactory.It is advised that the column sectional area be enlarged and the shear reinforcement of column ends be augmented to realize the flexural failure instead of the shear failure.
Compared to reinforced concrete structures,the seismic response of prestressed concrete structures is more complicated and the seismic performance could hardly be obtained by theoretical analysis.Based on a practical engineering,an experimental study is conducted on aseismic performance of post-tensioned bonded concrete exterior joint with strong beam-weak column subjected to reversed cyclic load.The failure pattern,hysteresis properties,skeleton curve,stiffness deterioration and failure strain etc.of the prestressed joint are studied.The results indicate that the displacement hysteretic loops of the bonded prestressed concrete frame exterior joint under the horizontal earthquake vary from shuttle to reversed-s shape with pinch;the ductility factor of this type of structures is larger than 4.0;and the dissipative capability is moderate.The aseismic performance of the prestressed exterior joint is satisfactory.It is advised that the column sectional area be enlarged and the shear reinforcement of column ends be augmented to realize the flexural failure instead of the shear failure.
引文
[1]曹霞,金凌志,付强.某厂房预应力框架节点设计探讨[J].工业建筑,2007,37(4):96-98.
[2]陈明政,黄音,陈曦,等.非强柱弱梁钢筋混凝土框架试验及有限元分析[J].重庆大学学报,2007,30(6):109-113.
[3]傅剑平.钢筋混凝土框架节点抗震性能设计方法研究[D].重庆:重庆大学土木工程学院,2002.
[4]房贞政,李彬,郑则群.部分预应力混凝土扁梁框架节点的拟静力试验研究[J].地震工程与工程振动,2003,23(4):111-116.
[5]GB50152-92,混凝土结构试验方法标准[S].
[6]唐益群,叶为民.土木工程测试技术手册[M].上海:同济大学出版社,1995:332-334.
[7]汪明栋.钢筋混凝土异形柱框架抗震性能试验研究与弹塑性分析[D].天津:天津大学,2006:39-40.
[8]薛伟辰,姜东升,陈以一,等.预应力混凝土空间节点抗震性能试验研究[J].建筑结构学报,2007,28(1):43-51.
[2]陈明政,黄音,陈曦,等.非强柱弱梁钢筋混凝土框架试验及有限元分析[J].重庆大学学报,2007,30(6):109-113.
[3]傅剑平.钢筋混凝土框架节点抗震性能设计方法研究[D].重庆:重庆大学土木工程学院,2002.
[4]房贞政,李彬,郑则群.部分预应力混凝土扁梁框架节点的拟静力试验研究[J].地震工程与工程振动,2003,23(4):111-116.
[5]GB50152-92,混凝土结构试验方法标准[S].
[6]唐益群,叶为民.土木工程测试技术手册[M].上海:同济大学出版社,1995:332-334.
[7]汪明栋.钢筋混凝土异形柱框架抗震性能试验研究与弹塑性分析[D].天津:天津大学,2006:39-40.
[8]薛伟辰,姜东升,陈以一,等.预应力混凝土空间节点抗震性能试验研究[J].建筑结构学报,2007,28(1):43-51.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心