建筑的抗震设防烈度是怎么定的，是不是越硬越抗震？
How is seismic fortification level set, is stiffer always better?
按场地可能遭遇的地震动概率划分设防等级；太刚易放大某些频率、太柔会晃坏，靠延性和耗能而非单纯硬来抗倒塌。
Seismic intensity reflects expected ground motion; neither too stiff nor too flexible is best, ductility and energy dissipation prevent collapse.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#抗震 #设防 #延性
桥梁和大坝上贴的那些传感器是在防什么？
What are the sensors on bridges and dams watching for?
结构健康监测用应变、位移、加速度等传感器实时盯挠度、裂缝和振动，预警超载、疲劳或损伤，避免突发垮塌。
Structural health monitoring tracks strain, displacement, and vibration to warn of overload, fatigue, or cracks before failure.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#健康监测 #传感器 #结构
防火墙和防火卷帘能挡火几小时，靠的是什么？
How can fire walls and shutters hold back fire for hours?
用防火板、混凝土或膨胀型涂料，遇火膨胀成隔热炭层；按耐火极限设计，给疏散和救援争取时间。
Fire-rated boards, concrete, or intumescent coatings that swell into insulation meet ratings like two hours, buying evacuation time.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#防火墙 #耐火 #隔热
地震预警为什么能比地震波跑得快，抢出几十秒？
How can an earthquake early warning beat the quake by tens of seconds?
预警利用先到的纵波比破坏大的横波快的特点，台网测到纵波后用近光速的电磁波抢先发警报。
It uses the faster P-wave detected by stations to send near-light-speed alerts before the damaging S-wave arrives.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#地震预警 #纵波 #横波
抗震的隔震支座是怎么让高楼在地震里少晃的？
How do seismic isolation bearings make a building shake less?
在楼体和地基间垫橡胶隔震层，拉长结构周期、避开地震主频，像给楼装软鞋，大幅减小传到上部的晃动。
Rubber bearings between building and ground lengthen its period to dodge the quake's frequency, like soft shoes damping motion.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#隔震 #支座 #抗震
楼房里的防火门为什么平时敞着、着火却会自己关上？
Why are fire doors open normally but close by themselves in a fire?
平时用电磁门吸敞开方便通行；火灾时断电或易熔件动作释放，闭门器把门合上，隔烟阻火形成疏散通道。
Magnetic holders keep them open for passage; on fire, power loss or a fusible link releases the closer to seal smoke and fire.
难度 专业 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#防火门 #闭门器 #隔烟
逃生楼梯为什么叫防烟楼梯间，多一堵墙有什么用？
Why is an escape stair called smoke-proof, what does the extra wall do?
前室和加压送风把楼梯间保持正压，烟气进不来，疏散时呼吸道不被呛；普通楼梯井会像烟囱灌烟。
A pressurized anteroom keeps the stairwell positive-pressure so smoke can't enter, protecting evacuees' breathing.
难度 专业 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#防烟楼梯 #正压 #疏散
威布尔寿命分析中，形状参数β小于1、等于1和大于1分别对应什么失效机理？各自指向何种维修策略？
In Weibull life analysis, what failure mechanisms correspond to shape parameters β below 1, equal to 1, and above 1, and what maintenance strategy does each suggest?
β<1表示失效率随时间递减，属早期失效，多源于制造缺陷或磨合不良，宜用筛选与老炼试验剔除薄弱个体；β=1退化为指数分布，故障随机出现，定时更换不能降低风险，应以状态监测为主；β>1表示失效率随时间上升，属耗损型失效，存在明确的特征寿命，此时按役龄定期更换或翻修才能真正控制风险。β值还能外推不同可靠度下的安全寿命。
When β < 1 the failure rate falls with time: these are early-life failures driven by manufacturing defects, so screening and burn-in remove weak units. β = 1 reduces the model to the exponential distribution, where failures occur randomly; scheduled replacement cannot reduce risk, and condition monitoring is the rational choice. When β > 1 the failure rate rises, marking wear-out with a characteristic life, so age-based replacement or overhaul genuinely controls risk. The fitted β also supports extrapolation of safe lives at required reliability levels.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Rausand, M.与Høyland, A.《系统可靠性理论：模型、统计方法与应用》第2版，Wiley，2004年
Rausand, M. & Hoyland, A., System Reliability Theory: Models, Statistical Methods, and Applications, 2nd ed., Wiley, 2004
独立核验依据 · Independent verification: 核验依据 1 ARCHIVE 标识 systemreliabilit0000raus：System reliability t
#威布尔分布 #失效率 #维修策略 #可靠性分析
高楼为什么要有避难层，躲在普通楼层不行吗？
Why do tall buildings need refuge floors, can't you wait on a normal floor?
超高层按规范间隔设避难层，防火防烟、有独立通风和救生口，是火灾时暂时避险等待救援的安全岛。
Very tall buildings place refuge floors at intervals, fire and smoke proof with independent air and access, as safe havens.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#避难层 #消防 #超高层
家里烟雾报警器响，它怎么分得清是做饭油烟还是真着火？
How does a smoke alarm tell cooking fumes from a real fire?
光电式靠烟雾散射光、离子式靠烟颗粒改变电离电流；单纯油烟颗粒大易触发，所以有厨房专用或带静音抑制。
Photoelectric and ionization detectors sense smoke particles; greasy fumes can false-trigger, so kitchen-rated or hush features help.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#烟感 #探测器 #误报
自动喷淋头为什么只喷着火那一片，而不是整层一起喷？
Why do sprinklers spray only the fire area, not the whole floor?
每个喷头玻璃球内有感温液体，达到温度就胀破出水，只有起火点附近升温的喷头动作，既灭火又减少水损。
Each head's glass bulb bursts only when locally heated, so only near-fire heads spray, fighting fire while limiting water damage.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#喷淋 #玻璃球 #感温
灭火器上写ABC，是指三种火还是三种用法？
On extinguishers, does ABC mean three fires or three uses?
指可灭的火灾类别：A固体如木纸、B液体如油、C气体如燃气；干粉ABC通用，油锅火要用水基或灭火毯。
A, B, C mark fuel classes, solid, liquid, gas; ABC powder is multipurpose, while cooking-oil fires need wet or blanket types.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#灭火器 #分类 #灭火
设备故障率的浴盆曲线为什么两头高、中间低？这条规律怎样指导维修策略？
Why does an equipment failure-rate bathtub curve rise at both ends and dip in the middle, and how does it shape maintenance policy?
寿命初期，材料缺陷与装配误差陆续暴露，故障率高但随磨合迅速下降；随后进入偶然故障期，故障仅由随机过载等因素引发，故障率近似恒定，体现设计固有的可靠水平；进入耗损期后，磨损、腐蚀与老化不断累积，故障率再次攀升。维修上宜分段应对：早期靠筛选与磨合剔除缺陷，平稳期用状态监测代替频繁解体检修，临近耗损期则按寿命定期更换。
Early in life, material flaws and assembly errors surface quickly, so failure rate starts high and falls as units burn in. Failures then become random events at a nearly constant rate—a useful-life plateau reflecting the design's inherent reliability. Finally wear, corrosion and ageing accumulate and the rate climbs again. Policy should follow the phases: screen and run in new units, use condition monitoring instead of intrusive overhauls on the plateau, and move to age-based replacement as wear-out nears.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
P.D.T.奥康纳与A.克利纳《实用可靠性工程》第5版，Wiley出版社，2012年。
P. D. T. O'Connor & A. Kleyner, Practical Reliability Engineering, 5th edition, Wiley, 2012.
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL3744715W：Practical reliability e
#浴盆曲线 #故障率 #视情维修
厨房油锅起火，为什么不能用水泼？
Why mustn't you throw water on a burning oil pan?
水比油重会沉底并瞬间沸腾把燃着的油溅开，火更大；应盖锅盖断氧或用灭火毯、干粉。
Water sinks under hot oil and flashes to steam, splashing burning oil; smother with a lid or blanket instead.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
NFPA 72/13/101；ASCE 7-16《最小设计荷载》；FEMA 抗震设计指南
NFPA 72/13/101; ASCE 7-16, Minimum Design Loads and Associated Criteria; FEMA seismic guidance
#油锅起火 #断氧 #灭火