关于高规0.2V_0剪力调整的探讨

Discussion on the 0.2V_0 shear force adjustment of technical specification for concrete structures of tall building

针对国家高规和广州高规关于框剪结构0.2V0剪力调整中对框架梁调整规定的不同进行了多角度分析;采用PKPM-SAUSAGE软件对一些普通工程算例进行有针对性的弹塑性动力时程分析。结果表明,若对框架梁不进行0.2V0剪力调整,罕遇地震作用下,在柱、墙及柱、柱之间协同工作性能较好的情形下可减小框架柱和剪力墙的地震剪力,并减小结构层间位移角;在其他情况下,对框架柱和剪力墙的地震剪力及结构层间位移角的影响很小;在目前规范条文限制下,建议采用广州高规的做法或者采用经验做法对框架梁的剪力调整系数进行控制。

Analysis was made from different perspectives aiming at the difference between the technical specification for concrete structures of tall building for both national and Guangzhou,regarding the 0.2V0 adjustment for shear force of frame beam in frame-shear wall structure. PKPM-SAUSAGE software was used to make dynamic elastic-plastic analysis specifically on some examples of common engineering. Results show that,if the 0. 2V0 adjustment is not made on the frame beam,when the collaborative performances between walls and columns and between columns and columns are relatively effective,the seismic shear force and inter-story displacement angle for both frame column and shear wall are reduced under rare earthquake. Under other circumstances,the effect on the seismic shear force and inter-story displacement angle is very small. Under limitations of current regulation rules,the suggestion here is to use the method described in the specification of Guangzhou or the experience in practice,to limit the adjustment coefficient of shear force.