关于荷载的相关计算题,国外工程专业,应该如何计算

如图所示简单的木材步行桥跨越7米，如图所示，是由两个工程级道格拉斯冷杉横梁。均匀分布的荷载由于脚踏桥的自重和横梁是96kg/m。桥梁需要进行一个活荷载为2.5kpa，1.4m宽的车道上。












a 计算上述结构的基础上每米固定载荷，kN / m的表示。

b 计算上述结构的基础上每米梁的活荷载，kN / m的表示

c 从计算中的负载（a）和（b）确定极限状态下的负载

d 假设B = 100毫米，K8= 0.75梁要求确定的最小深度达到的强度标准NZS3603

（梁是深度至最接近的50mm）

e 计算的长期偏转所选择的光束中的（d）

f 简评上面计算的偏转的可接受性






英文原题


The simply supported timber foot bridge shown in figure 5 spans 7 metres and, as shown, is carried by two Engineering grade Douglas Fir beams. The uniformly distributed load due to the self weight of the foot bridge and beams is 96 kg/m. The bridge is required to carry a live load of 2.5 kPa on the 1.4 m wide carriageway.

(a)
Calculate the dead load per metre of beam based on the above configuration and express your answer in kN/m.
(b)
Calculate the live load per metre of beam based on the above configuration and express your answer in kN/m
(c)
From the loads calculated in (a) and (b) determine the ultimate limit state load
(d)
Assuming b = 100 mm and k8 = 0.75 determine the minimum depth of beam required to met the strength criteria of NZS 3603
(Beam depth to be to the nearest 50mm)
(e)
Calculate the long term deflection of the beam chosen in (d)
(f)
Briefly comment on the acceptability of the deflection calculated above