（启迪设计集团股份有限公司， 苏州 215021）

［摘要］某工程为特别不规则结构，针对大底盘弱连接多塔偏置情况进行整体模型、分塔模型、并层模型分析。通过多种软件进行弹性时程、静力弹塑性、楼板应力对比分析对结构的抗震性能进行了较全面的研究。通过设置多方向框架梁提高大底盘整体性，针对关键薄弱构件设置防倒塌抗震措施。结果表明，结构的各项计算指标均符合规范要求，有效的抗震措施提高了结构抗震性能，结构安全可靠。

［关键词］特别不规则； 大底盘； 多塔偏置； 弹性时程分析； 静力弹塑性分析

中图分类号：TU318文献标识码：A文章编号：1002-848X(2017)20-0061-05

Structural design of bias multi towers with weak connections on an enlarged base

Xu Fan, Zhang Min, Wu Tao, Xu Yongjia, Wu Haibin

(Tus-Design Group Co., Ltd., Suzhou 215021, China)

Abstract:The project is a particularly irregular structure which is a bias multi tower with weak connection on an enlarged base situation, and analysis was conducted on the overall model, the tower model, and layer model. Elastic time-history analysis, static elastic-plastic analysis and floor stress contrast analysis were conducted to carry out a comprehensive study on the seismic performance of the structure through a variety of software. By setting the multi-directional frame beams, the integrity of the large base was improved, and anti-collapse seismic measures was set targeting at the key weak components. The results show that the calculated parameters of the structure meet the requirements of the code, and the effective seismic measures improve the seismic performance of the structure, and the structure is safe and reliable.

Keywords:particularly irregular; enlarged base;  bias multi tower; elastic time-history analysis; static elastic-plastic analysis

作者简介：徐凡，高级工程师，Email：fan.xu@tusdesign.com。