正交胶合木预应力剪力墙体系优化

Optimization for prestressed cross-laminated timber shear wall system

正交胶合木预应力剪力墙体系主要由正交胶合木墙板、预应力筋和软钢阻尼器组成，相比于传统体系，其自复位性能好，耗能性能稳定。预应力体系由软钢阻尼器提供耗能能力，软钢阻尼器存在最优化问题，尺寸参数、钢号、数量和位置优化方案各有区别。此外，预张力大小也影响体系的耗能效率和自复位性能。故基于ABAQUS软件，采用数值模拟方法分析阻尼器参数对剪力墙体系耗能的影响，以及预张力对体系耗能和自复位的双重作用。结果表明，软钢阻尼器尺寸、钢号和数量存在最优组合，位置不影响。预张力分别存在耗能最优值和复位最优值。

The prestressed cross-laminated timber （CLT） shear wall system is mainly composed ol CLT wall panels, prestressed tendons and mild steel dampers. It has good self-resetting performance and stable energy dissipation performance in contrast to the typical CLT wall system. Mild steel dampers provide energy dissipation for prestressed system. The size parameters, steel grades, quantity and location of dampers are different for different optimization schemes for mild steel dampers. In addition, the size of pretension also affects the energy dissipation efficiency and self-resetting performance of the system. Based on the ABAQUS software, the influence of damper parameters on the energy dissipation of shear wall system was analyzed by numerical simulation, and the dual function of pretension on energy dissipation and self-resetting was also discussed. The results show that there is an optimal combination of size, steel grade and quantity of mild steel damper while location has no effect. The analysis shows that the pretension has the optimal value of energy consumption and the optimal reset value respectively.