TALL BUILDING STRUCTURES TONGI UNIVERSITY 2)The door-shaped building structure has bad earthquake resistant ability.Because aw conjunction block is on thetop of the building,and the dynamic of ncreas odium is sienificant which will cause the damaee .building near the transfer flo tower works separately if cracks appear after higher intensity earthquake. 4)The flexible connections between towers can significantly reduce the drift of multi- tower high-rise buildings,and they will be destroyed and act as energy dissipation members du 5)For irregular shape multi-tower buildings,such as Shanghai Reception Center with shape the and constructed. Furthermore,suggestions on design,construction and maintenance of multi-tower buildings are put forward 1)It is very opriate conceptions and detailed eartha e resistant measures s according to the 2)Simplify the force route of lateral action and vertical weight.It is necessary to avoid applying different axis system to the podium and towers individually. 3)The stiffness and mass from the bottom to the top of the whole building shall distribute near one straight line,and the stiffness ratio of the superstructure to the adjusted within 0.5 2.0 nea n and the po dium roof must be strength ened,e.g.the pe ed Th of the shear-walls. columns and beams at the critical zone must be designed carefully 5)It is essential to analyze earthquake resistance of the whole structure during and after serious earthquake,and to analyze the dynamic behavior of the separated towers with partial podiums after the podium roof and floors are severely damaged,and to evaluate the 6)The seismic tion sha ing ta st is of importance fo th eanakeaety nd figurative pr hof those kinds of complex structures 7)It is essential and helpful for both architects and engineers to keep well cooperation between each other to solve the problem among beauty scene,function and safety. 8)Site tests and sensors embedded in the prototype structures will be helpful to mprove the analysis methods and the knowledge in this field. Rodrigo Martinez Arribas TALL BUILDING STRUCTURES TONGI UNIVERSITY Rodrigo Martínez Arribas 2) The door-shaped building structure has bad earthquake resistant ability. Because the rigid and heavy conjunction block is on the top of the building, and the dynamic response of the towers under earthquake action will increase. 3) The couple action between transfer floors of multi-tower building with large podium is significant, which will cause the damages near the transfer floors, and each tower works separately if cracks appear after higher intensity earthquake. 4) The flexible connections between towers can significantly reduce the drift of multi￾tower high-rise buildings, and they will be destroyed and act as energy dissipation members during a moderate earthquake. 5) For irregular shape multi-tower buildings, such as Shanghai Reception Center with U-shape, the responses are very complex. Not only the couple actions between towers but also the internal forces in the narrow shape slab are affective to the safety of the building. 6) Multi-tower building may be severely damaged when it is subjected to strong earthquakes. However the building will keep in safety if it is appropriately designed and constructed. Furthermore, suggestions on design, construction and maintenance of multi-tower buildings are put forward: 1) It is very important to design and construct multi-tower buildings according to the appropriate conceptions and detailed earthquake resistant measures. 2) Simplify the force route of lateral action and vertical weight. It is necessary to avoid applying different axis system to the podium and towers individually. 3) The stiffness and mass from the bottom to the top of the whole building shall distribute near one straight line, and the stiffness ratio of the superstructure to the podium shall be adjusted within 0.5~2.0. 4) Members near tower bottom and the podium roof must be strengthened, e.g. the reinforcement ratio shall be increased and the performance of concrete beams, slabs, columns and shear walls shall be enhanced. The ductility property of the shear-walls, columns and beams at the critical zone must be designed carefully. 5) It is essential to analyze earthquake resistance of the whole structure during and after serious earthquake, and to analyze the dynamic behavior of the separated towers with partial podiums after the podium roof and floors are severely damaged, and to evaluate their earthquake resistance. 6) The seismic simulation shaking table test is of importance for the earthquake safety research on multi-tower high-rise buildings. Shaking table test is proved to be a relative effective, economic and figuratively measure for the seismic research of those kinds of complex structures. 7) It is essential and helpful for both architects and engineers to keep well cooperation between each other to solve the problem among beauty scene, function and safety. 8) Site tests and sensors embedded in the prototype structures will be helpful to improve the analysis methods and the knowledge in this field