论文部分内容阅读
以某大跨度钢-混凝土组合楼板模型为对象,采用蒙特卡洛法模拟随机人群荷载,人群荷载考虑随机步频和起步相位,分析了两类人群荷载作用结构响应特性。对人群随机行走,分析了不同人流量和随机步态参数(步频和起步相位)对结构动力响应的影响;对于人群节律性运动(跳舞和健身操等),分析了相位差、接触比和人群密度等因素对结构动力响应的影响。研究表明:对人群随机行走,N人随机行走下结构动力响应与单人响应满足N(1/2)倍关系,可以用来简化计算人群响应;人群简化为相同步频和相同起步相位将会过高估计结构响应。对人群节律性运动,简化为同相位运动会过高预测结构的响应;接触比越大,响应越小;节律性运动下结构响应与人群密度的关系同人群随机行走相同。
Taking a large-span steel-concrete composite floor model as an object, Monte-Carlo simulation of random population load, population load considering random steps and starting phase, the response characteristics of two types of crowd load structure are analyzed. The effects of different human flow and random gait parameters (pitch frequency and starting phase) on the dynamic response of the structure were analyzed. For the rhythmic movement of people (dancing and aerobics, etc.), the phase difference, contact ratio and Population density and other factors on the dynamic response of the structure. The results show that when the population is walking randomly, the N dynamic response and the single response of N people satisfy N (1/2) times relationship, which can be used to simplify the calculation of population response. The simplification of population to the same synchronization frequency and the same initial phase will Overestimate the structural response. The rhythmic movement of the population is reduced to a response that is too predictive of the same phase movement; the larger the contact ratio, the smaller the response; and the relationship between structural response and population density in rhythmic movements is the same as in a randomized population.