中建八局浙江建设有限公司专栏 2025年 第卷 第02期

DOI: 10 7672 / sgjs2025020050

消能摇摆结构地震作用弹性计算方法

张文津¹’²,李国强²,张 昊¹,高邦正³,贾宝莹¹,王战士¹

作者简介:

张文津,工程师,E⁃mail: 1150744@ tongji. edu. cn

作者单位:

1. 中建八局浙江建设有限公司,浙江 杭州 311200; 2. 同济大学土木工程学院,上海 200092; 3. 浙江大学国际联合学院,浙江 海宁 314400

基金项目:

∗上海市 2024 年度“科技创新行动计划”启明星项目(24QB2707500)

摘要:

消能摇摆结构由主体框架结构、摇摆结构和耗能构件组成. 在地震作用下,摇摆结构能抑制薄弱层的影响,提高结构抗震性能. 耗能构件在设防地震作用下保持弹性,为整体结构提供抗侧刚度;而在罕遇地震作用下,其发生塑性变形以耗散能量. 提出脚部附加刚度的剪切层⁃弹性弯曲杆模型,采用连续连梁法推导均布荷载与倒三角荷载作用下结构弹性计算公式. 通过与有限元结果对比,验证了计算方法的准确性. 改进顶部附加地震作用系数计算方法,提出消能摇摆结构地震作用弹性计算方法,并验证该方法的有效性. 研究表明,地震作用弹性计算方法能相对准确地计算消能摇摆结构内力和变形. 相比于底部剪力法,提出的地震作用弹性计算方法精度更高,能更准确地反映了高阶振型的影响.

English:

The energy dissipation rocking structure is composed of main frame structure, rocking structureand energy dissipation components. Under the action of seismic, the rocking structure can suppress theinflunce of weak layers and improve the seismic performance of the structure. The energy dissipationcomponents remain elastic under the action of fortification earthquake, providing the lateral stiffness forthe overall structure. It undergoes plastic deformation to dissipate energy under rare earthquakes. Theshear layer⁃elastic bending rod model with additional foot stiffness is proposed, and the elastic calculationformula of the structure under uniform load and inverted triangle load is derived by using the continuouscoupling beam method. By comparing with the finite element results, the accuracy of the calculationmethod is verified. The calculation method of additional seismic action coefficient at the top is improved,and the elastic calculation method of seismic action for energy dissipation rocking structure is proposed,which verifies the effectiveness of the method. The research shows that the structural elastic calculationmethod can calculate the internal force and deformation of the energy dissipation rocking structurerelatively accurately. Compared with the bottom shear method, the proposed elastic calculation method ofseismic action for energy dissipation rocking structures is more accurate and reflects the influence of high⁃order modes more accurately.