新型型钢-混凝土组合柱恢复力模型研究  

Restoring force model of a novel steel-reinforced concrete composite column

作　　者：王朋[1,2,3] 于彬 史庆轩 王秋维[1,2,3] WANG Peng;YU Bin;SHI Qingxuan;WANG Qiuwei(State Key Laboratory of Green Building in Western China,Xi'an University of Architecture&Technology,Xi'an 710055,Shaanxi,China;School of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an 710055,Shaanxi,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi'an 710055,Shaanxi,China)

机构地区：[1]西部绿色建筑国家重点实验室/西安建筑科技大学,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《地震工程学报》2023年第3期661-672,共12页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(52178159,51878543,51878540);西部绿色建筑国家重点实验室自主研究课题(LSZZ202018);陕西省教育厅自然科学专项项目(21JK0733)。

摘　　要：提出一种新型型钢-混凝土组合柱,并对其进行数值模拟分析,研究翼缘厚度、钢管径厚比、轴压比、混凝土强度等参数对该组合柱抗震性能的影响。将新型型钢-混凝土组合柱截面进行合理简化,基于平截面假定建立组合柱正截面承载力计算公式,通过对比试验与模拟数据,发现公式计算结果具有较高精度。进一步提出组合柱截面屈服点、峰值点、破坏点、加载刚度、卸载刚度等特征参数的计算方法,确定恢复力模型的滞回规则,最终建立基于退化三线型模型的新型型钢-混凝土组合柱恢复力模型。将公式计算得到的滞回曲线与试验得到的滞回曲线进行对比,发现二者吻合较好。The seismic performance of a novel steel-reinforced concrete(SRC)column with various thicknesses,diameter-thickness ratios of steel pipe,axial compression ratios,and concrete strengths was investigated using numerical simulation.Given the reasonable simplification of the section of the new-type SRC column,the calculation formula for the bearing capacity of the normal section was proposed based on the plane section assumption.Notably,the calculation results are consistent with those obtained from test and numerical simulations.Furthermore,a method for calculating characteristic parameters such as yield point,peak point,failure point,loading stiffness,and unloading stiffness was proposed,and the hysteretic rule of the restoring force model was suggested.Finally,the restoration model of the novel SRC column was established on the basis of three degenerated linear models.The hysteretic curves calculated using the formula are consistent with those obtained from the test.

关 键 词：组合柱 抗震性能 正截面承载力 特征参数 恢复力模型 

分 类 号：TU398[建筑科学—结构工程]