内置碟簧自复位混凝土剪力墙基于性能的截面设计方法  

A PERFORMANCE-BASED SECTION DESIGN METHOD OF A SELF-CENTERING CONCRETE SHEAR WALL WITH DISC SPRING DEVICES

作　　者：徐龙河[1] 肖水晶[1] XU Long-he;XIAO Shui-jing(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《工程力学》2020年第4期70-77,86,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51578058);北京市自然科学基金项目(8172038)。

摘　　要：内置碟簧自复位混凝土剪力墙主要由墙体及墙脚两侧的碟簧装置组成,碟簧装置具有较高的抗压能力,卸载后能恢复到变形前的状态,为墙体提供恢复力,减小结构的震后残余变形。为了较好地设计内置碟簧自复位混凝土剪力墙,该文提出基于性能的截面设计方法。定义了四水准下结构的性能目标和损伤状态,直接基于第三水准下的位移目标设计剪力墙截面尺寸,碟簧装置几何尺寸、承载能力和变形能力。根据自复位剪力墙截面的受力分析,推导其承载力理论计算公式,并对设计的内置碟簧自复位混凝土剪力墙进行弹塑性分析。结果表明,按该方法设计的自复位剪力墙具有较好的复位能力,墙体的损伤也得到有效控制,在位移角分别为0.5%和1%时,残余位移角仅分别为0.012%和0.022%,损伤指标分别为0.12和0.21,符合基于性能的设计目标。推导的理论计算公式能很好地评估剪力墙的承载能力,计算结果与有限元模拟结果吻合较好。A self-centering reinforced concrete(RC)shear wall with disc spring devices is mainly composed of a wall system and disc spring devices at the foots of the wall.The disc spring devices are featured by high compression and can return to its initial form after the load is removed.The disc spring devices can provide restoring force and reduce the residual deformation for the wall system after earthquake.To better design the self-centering RC shear wall with disc spring devices,the performance-based section design method was proposed.The structural four-level performance objective and damage state were defined.The sectional dimensions of the shear wall,the geometric size,bearing capacity and deformation capability of the disc spring devices were determined so that the structure can be used normally after earthquakes.The theoretical calculation method of bearing capacity for the self-centering RC shear wall with disc spring devices was proposed based on sectional forces analysis.The elasto-plastic analysis of the designed self-centering RC shear wall with disc spring devices was finally carried out.Results indicate that the self-centering wall designed by using the proposed method showed good self-centering capability,and its damage was also effectively controlled.The residual displacement ratios were 0.012%and 0.022%and damage indices were 0.12 and 0.22,respectively,at 0.5%and 1%drift ratios,which met the performance-based design goal.The bearing capacity of the self-centering wall was well evaluated through the design method,and the values were in good agreement with the simulation results obtained from the finite element model.

关 键 词：自复位混凝土剪力墙 碟簧装置 残余变形 截面设计方法 承载能力 弹塑性分析 

分 类 号：TU352.11[建筑科学—结构工程]