某岩溶强发育场地多项不规则部分框支剪力墙结构设计研究

Structural design research on a frame-supported shear wall with multiple irregular parts in a karst rock strongly developed region

某岩溶强发育场地9#楼为部分框支剪力墙结构,地上30层,结构高度为97.7m,在二层设置转换层(梁式)。基础设计时遇到勘探精度不足等不确定因素导致超前钻见岩标高与桩基全断面见岩标高相差较大,溶洞判断不准,导致基础方案不合理。主体设计时遇到楼板局部不连续、薄弱层、相邻层质量比超限、商业连廊引起的平面不规则、扭转不规则、框支柱周围楼板错层布置、竖向不规则等情况。结合工程特点及超限情况,给出了不同的超限处理情况和地基处理措施。同时结合多遇地震下反应谱分析、弹性时程分析及罕遇地震下静力弹塑性等指标结果分析,结果表明,结构各项指标满足规范要求,采取的各项超限处理措施有效,能够满足设计要求。

The 9 th building in a karst strong development site is a partial frame-supported shear wall structure with 30 floors above ground and a structural height of 97.7 meters.A transfer floor(beam type)is set on the second floor.In the foundation design,the lack of exploration precision and other uncertain factors lead to the large difference between the rock elevation in advance drilling and the rock elevation in full section of pile foundation,and the inaccurate judgment of karst cave leads to the unreasonable foundation plan.In the design of the main body,the floor is partially discontinuous,the weak floor,the quality ratio of adjacent floors exceeds the limit,the plane irregularity and torsion irregularity caused by the commercial corridor,the floor around the frame pillar is arranged in different floors and the vertical irregularity,etc.Based on the characteristics of the project and the over-limit condition,different over-limit treatment conditions and ground treatment measures are given.At the same time,the results of response spectrum analysis,elastic time history analysis and static elastic-plastic analysis under rare earthquakes are combined.The results show that all the indexes of the structure meet the requirements of the code,and the measures taken for the over-limit treatment are effective and can meet the design requirements.