珠海航展中心主展馆工程预应力混凝土柱抗拉弯性能分析  

Analysis of tensile and bending behavior of prestressed concrete column of Zhuhai Airshow Center Main Exhibition Hall project

作　　者：魏路 刘翔 叶海登 WEI Lu;LIU Xiang;YE Haideng(Guangdong Shewei Engineering Consulting Co.,Ltd.,Guangzhou 510075,China;CAPOL International&Associates Group,Guangzhou 510640,China;Jiujiang Urban Planning&Municipal Design Institute,Jiujiang 332000,China)

机构地区：[1]广东舍卫工程技术咨询有限公司,广州510075 [2]华阳国际工程设计股份有限公司,广州510640 [3]九江市城市规划市政设计院,九江332000

出　　处：《建筑结构》2021年第4期65-70,共6页Building Structure

摘　　要：在台风作用下,大跨度屋盖会产生较大吸力,同时支承柱也承受着风荷载水平推力,出现拉弯受力状况。此时柱子会出现裂缝,刚度降低,水平位移增大,对于悬臂柱P-D效应更加明显,恢复性能变差。针对以上现象,以珠海航展中心主展馆为例,提出一种后张有粘结预应力混凝土柱,采用有限元软件分析其在拉弯荷载下的力学性能,考虑了轴拉比、混凝土强度、配筋率以及预应力钢绞线与普通钢筋比值等因素。分析结果表明,试件抗拉弯承载力随着轴拉比的增大而降低;混凝土强度越高,配筋率越大,承载力则越高;当预应力度不大于0.2时,有较好的耗能性能。Under the action of typhoon, the large-span roof will generate a large suction force, and at the same time, the supporting column will also bear the horizontal thrust of the wind load, and the tension and bending force will appear. At this time, the column will appear cracks, the rigidity will decrease, and the horizontal displacement will increase. The P-D effect for the cantilever column is more obvious, and the recovery performance becomes worse. Aiming at the above phenomena,taking the Zhuhai Airshow Center Main Exhibition Hall as an example, a post-tensioned bonded prestressed concrete column was proposed. The mechanical performance of the column under the tension and bending load were analyzed by finite element software, considering the axial-tension ratio, concrete strength, reinforcement ratio and the ratio of prestressed steel strand to ordinary steel and other factors. The analysis results show that the tension and bending capacity of the specimen decreases with the increase of the axial-tension ratio;the higher the concrete strength, the greater the reinforcement ratio, and the higher the bearing capacity. When the degree of the prestressing is not more than 0.2, it has better energy consumption performance.

关 键 词：珠海航展中心 预应力混凝土柱 抗拉弯性能 大跨屋盖 

分 类 号：TU395.9[建筑科学—结构工程]