| The assembled steel structure housing has become the object of vigorous development in China because of its advantages of energy saving and carbon reduction,convenient construction and flexible space layout.The floor system is the key to the development of assembled steel structure housing,and the commonly used one is the mold-free floor slab with a high degree of assembly.However,the commonly used assembled floor slabs still have problems such as partial assembly,wet work,self-importance,and imperfect design and construction specifications.In response to the above problems,this paper proposes a fully assembled steel composite floor slab system matched with assembled steel structure residential,which is studied to have good mechanical properties,but due to the light self-weight and low stiffness,people’s daily activities are more likely to cause vibration response of the floor slab,and its vibration comfort performance is not clear.Therefore,in this paper,the vibration comfort performance of TPSF floor slab is studied by ABAQUS finite element software to lay the foundation for the next test development and engineering application.The main work and research results are as follows:(1)The composition of the TPSF system is introduced in detail,and the box beam as well as the key connection nodes are briefly explained.The optimized design of the floor slab is based on the load carrying capacity,based on which four slab types are proposed to provide models for the next analysis of the dynamic performance.(2)Modal analysis of the four types of floor slabs is carried out using finite element software to study the dynamic response of the floor slabs under the excitation of pedestrian,running and jumping loads and to evaluate their comfort.The results show that the frequencies of the four floor slabs meet the code requirements,and the acceleration of the SCP70-320-670 floor slab does not meet the code limits under the excitation of pedestrian load,which should be damped during the design.(3)To study the effects of special corrugated slab thickness,floor span,restraint conditions,load conditions,damping ratio and other factors on the dynamic performance of floor slabs.The parameters of the four types of floor slabs are optimized based on frequency and acceleration.The results show that: the special corrugated plate thickness increases,the floor frequency increases and the acceleration decreases as a whole(except for the resonance of individual models);the span increases,the floor frequency decreases and the acceleration increases;the vibration comfort performance of the floor under solid support restraint is significantly better than that of simple support;the floor load increases,the floor frequency decreases and the acceleration decreases;the damping ratio increases to reduce the vibration response of the floor.(4)A steel residential building in Jinan is used as an example structure,and the frequency of TPSF system and acceleration response under pedestrian load are analyzed by using YJK,and the influence of different walking paths on the vibration response of the floor slab is explored by comparing two ways of fixed-point loading and mobile loading.The results show that: the maximum deformation of the standard floor occurs at the mid-span of the maximum span,and its first-order frequency satisfies the code;the vibration response is greatest when the pedestrian walks along the mid-span of the floor;due to the existence of overlap in the width direction of the floor,the acceleration along the width direction of the floor is greater than that along the length direction;the acceleration under fixed-point loading is slightly greater than that under mobile loading. |
