9度设防区某办公楼主体结构设计

Main structure design of an office building in the earthquake fortification region of 9 intensity

从概念设计出发,阐述了高烈度区建筑结构设计"两阶段,三水准"抗震设计思想。竖向构件是结构在大震作用下维系结构整体稳定的基石,须确保竖向构件在大震作用下内力重分布后仍具有足够的承载力。因此,"强剪弱弯"、"强柱弱梁"、"强墙肢弱连梁"是确保结构在大震作用下裂而不倒的延性措施。对弹塑性动力时程分析的结果"相对最佳"的合理性判别以及对柱端实际受弯承载力相适应的抗震受剪承载力的调整,是保障框架柱不出现柱铰机构的关键。"耗能元件"和梁端"屈服区"运用"抗"、"调"相结合的"强剪弱弯"的措施是确保结构耗能和传力途径通畅的技术保证。

Starting from the conceptual design of earthquake, the anti-seismic design thought of ＇two stages and three levels＇ for architectural structure design in high intensity region is elaborated. As vertical members are the foundation for structure to maintain integral stability of structure under strong seismic effect, it is important to ensure the vertical member to maintain enough bearing capacity after redistribution of internal force under strong seismic effect. Therefore, ＇ strong shear and weak bending＇, ＇ strong column and weak beam＇ and ＇strong wall bracing and weak connection beam＇ are the ductility measures to ensure no collapse of structure even if cracked under strong seismic effect. And it is the key for no occurrence of hinge mechanism at the frame column to perform rationality discrimination to the ＇relatively optimal＇ result in elastic-plastic dynamic time analysis, as well as adjustment to the anti-seismic shear capacity adapted to the actual flexural capacity at the column hinged end. With the measure of ＇strong shear and weak bending＇ combining ＇ anti＇ and ＇ adjustment＇ for ＇ the energy-consuming elements＇ and beam end ＇ yielding region＇ is the technical assurance to ensure structural energy consumption and smooth path for load transferring.