According to the comparative tests between serial kinds of flooring for protection against impact load,the calculation method of the equivalent static load on the floors and the constructional details of floor for protection against impact load are given in this paper.

In this paper,some problems that often appear in the structural design of the first category five and six grade air defence besement with slab-column structure,for example determining of equivalent dead load and dimension of structural members,calculating of internal forces and reinforcing bars,calculating of basement bottom slab,designing of piled foundation,are analysed and discussed.

Numerical calculation of evaluating equivalent static wind loads on long span roof structures;

The methods to obtain the background component of structural equivalent static wind loads systemically are discussed.

Comparing with conventional method,the recommended approach,not requiring getting equivalent static wind loads(ESWLs),is reasonable,simple and of value to be popularized.

Study in time domain on equivalent static wind load of large span steel structure;

Based on the modified SRSS method,an equation for equivalent static wind loads combining mean,background and resonant components,is derived.

It is important to determine the wind-induced response accurately and formulate the component of equivalent static wind loads of large span roofs reasonably.

The equivalent static wind loads (ESWL) provide an effective approach to deal with the spatiotemporally varying wind loads for structures with long span roofs.

The equivalent static wind loads (ESWL) which produce maximum peak responses of roof-structures are formulated based on the modal expansion of the resilience and the quasi-static equation for calculating responses.