采用消能减震结构进行降度设计的方法探讨

Discussion on the degree reduction design method of energy dissipation building

在加固工程中采用消能减震结构降度设计,降低主体结构抗震等级从而降低主体结构的抗震构造措施的方法高效且经济。对比了五个相关标准中关于采用消能减震结构的降度设计条件,提出了采用消能减震结构进行降度设计的应用建议:多层结构时,主体结构在反应谱下底部剪力降低程度超过50%;高层结构时,主体结构底部或控制楼层(相对薄弱的楼层)在反应谱下承担层间剪力降低程度超过50%;消能减震结构在反应谱下的最大层间位移降低程度超过50%。以上海某中学加固工程为例,对采用消能减震结构的加固方案进行了深入分析,结合各项计算结果及相关规范、规程的要求,表明结构减震效果明显,主体结构抗震构造措施可以按降低1度执行。

Using the degree reduction design of energy dissipation building to reduce the details of seismic structural measures of the main structure is an efficient and economic method in the reinforcement projects.The degree reduction design conditions of energy dissipation building in five relevant standards were compared,and the application suggestions of degree reduction design of energy dissipation building were put forward.For multi-storey structures,the bottom shear force of the main structure under the response spectrum is reduced by more than 50%;for high-rise structures,the bottom of the main structure or the control floor(relatively weak floor)bears the interlayer shear force under the response spectrum is reduced by more than 50%;the mixmum interlayer displacement of the energy dissipation building under the response spectrum is reduced by more than 50%.Taking the reinforcement of a middle school as an example,the in-depth analysis for the reinforcement scheme on energy dissipation building were carried out.Combined with the calculation results and the requirements of relevant codes and regulations,it shows that the shock absorption effect of the structure is obvious,and the seismic structural measures of the main structure can be reduced by 1 degree.