| 双防线可恢复性能斜交网格结构耗能机制和抗震性能研究 |
| |
| 引用本文： | 李天翔,Yang T.Y.,童根树.双防线可恢复性能斜交网格结构耗能机制和抗震性能研究[J].世界地震工程,2019,35(3):037-44. |
| |
| 作者姓名： | 李天翔 Yang T.Y. 童根树 |
| |
| 作者单位： | 1. 浙江大学 建筑工程学院土木工程系, 杭州 310058;2. 同济大学 地震工程国际联合研究中心, 上海 200092 |
| |
| 摘 要： | 为提高斜交网格结构的抗震性能，提出一种双防线可恢复性能斜交网格结构。双防线可恢复性能斜交网格结构采用剪切耗能段和特定梁端塑形铰进行集中耗能，使主体结构构件保持弹性。剪切耗能段不承受和传递重力荷载，易在震后修复或更换，使建筑可迅速恢复功能。为实现目标耗能机制，对等效能量塑形设计法进行改进以适用于可恢复性能斜交网格结构，并进行结构设计举例。采用OpenSees软件对所设计结构建立详细的有限元计算模型，进行非线性动力时程分析，以验证双防线耗能机制并评估抗震性能。分析结果表明:（1）小震、中震和大震下的结构顶部位移角分别为0.28%、0.8%和1.7%，与性能设计目标基本相同；（2）中震时剪切耗能段屈服，特定梁端未出现塑性铰；（3）大震时，特定梁端出现塑性铰以增加结构耗能能力，剪切耗能段屈服且处于延性范围内。因此新型可恢复性能斜交网格结构具有有效的双防线耗能机制，在中震后可迅速修复，在大震中可保持延性，实现"中震可修，大震不倒"的性能目标。
|
| 关 键 词： | 斜交网格 可恢复性能 剪切耗能段 塑形设计 非线性动力分析 |
Energy dissipation mechanism and seismic performance of earthquake-resilient diagrid structure with dual resisting system |
| |
| LI Tianxiang,YANG T. Y.,TONG Genshu.Energy dissipation mechanism and seismic performance of earthquake-resilient diagrid structure with dual resisting system[J].World Information On Earthquake Engineering,2019,35(3):037-44. |
| |
| Authors: | LI Tianxiang YANG T Y TONG Genshu |
| |
| Affiliation: | 1. Department of Civil Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;2. International Joint Research Laboratory of Earthquake Engineering, Tongji University, Shanghai 200092, China |
| |
| Abstract: | In order to improve the seismic performance of the diagrid structural system, this paper proposed a new-type earthquake-resilient diagrid structure with a dual resisting system. The new-type diagrid system utilizes designated shear links and moment connections to dissipate earthquake energy and protects the main structure from entering plasticity. The shear links are separated from gravity system so that they can be easily repaired or replaced after earthquake shaking. Therefore, the building would stay functional in an earthquake. To achieve the energy dissipation mechanism, an equivalent-energy-based plastic design method was proposed for the new diagrid system and applied to the structural design of the prototype building. The nonlinear dynamic time history analyses of the prototype building were performed using OpenSees. Results showed that (1) the median roof drift ratios of the designed structure under SLE, DBE and MCE intensity were 0.28%, 0.8% and 1.7%, respectively, almost the same with the design value; (2) the shear links yielded under the DBE intensity while the designated moment connections remained elastic; (3) the moment connections yielded under the MCE intensity to help dissipate energy and the shear links remained ductile. Thus the new earthquake-resilient diagrid structure has a robust energy dissipation mechanism. It can be easily repaired within a short time under the designed earthquake, and can remain ductile under a major earthquake to prevent the structural collapse. |
| |
| Keywords: | diagrid structure earthquake resiliency shear links plastic design nonlinear dynamic analysis |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《世界地震工程》浏览原始摘要信息 |
|
点击此处可从《世界地震工程》下载全文 |
